Coil Length Calculator

Factory Series coil-over shocks are the foundation of a race-winning suspension. A = 1/2 thickness of all of the wire from the outside of the hub, or the radius of thickness of the wire wound on the drum, or the outside radius minus the drum radius. The results are tabulated as follows: Table 5 and 6 list the. The main function of Coils selection module software is to calculate the performance of tubes and fins heat exchangers. steelmillsoftheworld. It is optional to add the capacitance for f. \$\begingroup\$ Single layer air-core coil, sounds like a Tesla coil secondary. You may begin the calculations with a known length of wire instead of a frequency or band. Description of the cooling coil for a)- Dx-cooling; b)- Chilled water coil (Aerofin heat transfer products). Use CoilCalculator. To calculate the total heat removed from the air stream in a cooling coil, we must account for the sensible and latent heat. The calculated results are only to be used as a guide and cannot be guaranteed, entering incorrect values will result in an invalid result. In this tool, the variables required are length and wire diameter. Spring Rate & Pressure at Compressed Length This is really quite simple. Dual Rate Spring Calculation Guide. mad hatter, Rogue the Rogue has a top airflow the others are bottom airflow but all of them has air that comes in from the side turns 90 degrees and the coils need to be right over or under the airflow so the coil leg length would need to be 7-10 mm depending on the coil diameter. Free calculator for coil builders to measure the wire length needed to clapton various types of core wires. End coils are edge coils of the spring, co-axial with the active coils, whose angle pitch does not change during functional deformation of the spring. Tesla's original coils were shaped like barrels! My last coil was 2' tall, 5" diameter, wound with #24 magnet wire. CBM Calculator is a free utility to calculate consignment's weight and volume. Coil-Over Conversions Explained by Chris Alston To dispel some popular myths and help you understand which coil-over conversion is best for your project, it is necessary to explain in great detail about shocks and springs. How do you calculate the length of the steel coil if. So, for small coil OD’s of ¼ of an inch the ration of extended to retracted length is around 3 to 1. Within the spring design, wire diameter, number of coils, and spring free length L0 are designed for a specific load, material and assembly dimensions, or spring diameter. To calculate spring wire length per coil, you must subtract the wire diameter from the outer diameter in order to get mean diameter. Download our "LA Coil Calculator" beta Smartphone App! (Android phones only at this time) We have been working on a mobile version of our coil calculator to help you while on the jobsite. Things to look out for when measuring for collapsed length are chassis, link, tyre interference issues, overwrapping of the leaf-spring packs, and coil bind on a coil suspension. 30 m) length of the coil should not exceed 140 feet (42 m) if 1/2" pipes are used. The "Steel Coil Calculator" App is designed to help you quickly and easily determine common coil sizes based on your specific requirements. Family of Companies. RFID coil antennas Priority 1 Design carry a stock of these RFID coil antennas. "These pipes were rolled DEAD ON. Where: L f = Uncompressed length of spring n c = Number of coils. The next step is to select your material of construction and call TITAN for a quote. To calculate the inductance, enter the coil diameter, the number of turns and the coil length into the calculator. Need a hand showing how to add the icon to your smart phone. It helps user to calculate cubic meters (CBM) when shipping goods. Re: weight to length with copper wire The Std. Supply wiring must be rated to carry at least the amps shown as MCA. Then follow these steps: Position the coil above the screw. 10 thoughts on “ Q&A: Mesh coils ” Gary Parr 2018-02-03 at 19:32. 2 ohms of lead resistance. Start calculating here!. Once you have calculated mean diameter, multiply it by pi (3. Product Details. Select your alloy, then use the slider bars to indicate the coil you need (gauge and width). Select an. 30 m) length of the coil should not exceed 140 feet (42 m) if 1/2" pipes are used. If you've experimented with 5/8 wave antennas before and know of a better formula for your QTH, feel free to change the formula to suit. Improve system efficiency with 25 coil types, five fin surfaces, IVS and a wide selection of refrigerant coil circuiting options. We stock Stainless Steel, Nickel Alloys, Aluminum and other Specialty Metals in coil form and also offer toll processing of various metals including: Stainless Steel, Nickel Alloys, Titanium, Aluminum, Brass, Copper, Carbon Steel, and other Specialty Metals. This thinking may apply to radio antenna but it is totally. To use this. 8mm what is the length and what is the. We welcome you to use our spring calculator, which allows you to custom design a spring to your exact specifications. Here we cannot apply the above derivation as the coil is thick. Tail Lead Length (Total) This is the length of the lead in/lead out of the coil. I have a question to ask you regarding your formula. a primary tank capacitor or topload capacitance to find the resonant frequency of the LC circuit. From VE3ERP Hamcalc Software Program. You take that number and using the strip width will give you the coil weight. Place a 1:1 Balun on the Antenna end of the Feedline. In order to guarantee the accurate dimension of a profile to be produced within given tolerance limits, a calculation of the coil stock width with maximum accuracy will be necessary. Cross Section Property Calculator Powered by WebStructural. This tank heating calculator can help you determine the required surface area of an immersion coil using water as the heat source. ROOFING COIL. 10 degrees, 15 degrees, etc. Sheet Weight. axial length of the coil. L= (d^2 * n^2)/(18d+40l) where: L is inductance in micro Henrys, d is coil diameter in inches, l is coil length in inches, and n is number of turns. The simplest way to calculate the magnetic field of a solenoid is to use our calculator. Use the Coil Calculator to estimate the amount of metal on a coil. Works for 1. If you're working in the metalworking industry, even you're engineers, you will try to find one calculator to help you calculate the weight of various metals and steels including ms plate, gi sheet, structural steel, ms angle, mild steel, steel bar, square tube, angle, aluminum etc. You will note that one is for long coils. Select your gauge and fill in the measurements to determine the square footage, the lineal footage and weight. Each affects the others. By making that substitution, the rule of thumb we commonly use today (and that any technician can calculate), Ampere-Turns = 45,000 / L/D, was born. The half-wave dipole is very simple to construct. Then follow these steps: Position the coil above the screw. Aluminum coil, aluminum flat sheet, steel coil, metals processor, distributor and exporter, quality products from amerimet. L=coil length; As a general rule, Q in a RF inductor peaks with a form factor (L/D) between 1 and 4. The metal roof length calculator calculates the distance from peak to trim so add the length you want the roof metal to extend beyond the eave trim. Therefore, the bend allowance added to the flange lengths is equal to the total flat. 2: mm: Wrap count Number of wraps: 14. On the other hand a coiled cable with a 5 inch coil OD and 1 inch retracted length would extend about 6 inches. The size and shape of the conductor used in the coil sets the optimum diameter, larger conductors require larger diameters. While a temperature controller is recommended for all heat tracing applications, in this case it should be considered essential. ) The distance the a screw or nut will advance every 360° turn. As said above, the μ r is the relative magnetic permeability for whatever you're using for the coil's core, the cylinder that you're winding the wire on. This property also leads to a disadvantage of the air cored coil: microphony. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Calculate fluid flow and pipe velocities in a suction or discharge of a pump. 8mm what is the length and what is the. tall, it should be about 1ft. All Rights Reserved. UNIQUE PROGRAM OFFERINGS Like all of Majestic’s galvanized customers, our prepainted steel customers benefit from unique program offerings that are customized by our team on an individual basis. If you know how many linear feet you need: We can tell you approximately how many pounds of coil you will need. This tank heating calculator can help you determine the required surface area of an immersion coil using water as the heat source. A helix is defined as a spiral that also has a linear dependence upon a third dimension. As said above, the μ r is the relative magnetic permeability for whatever you're using for the coil's core, the cylinder that you're winding the wire on. To calculate the total heat removed from the air stream in a cooling coil, we must account for the sensible and latent heat. How to calculate length of wire on a spool - posted in Master classes: Well, at 60 [later this month] I've forgotten my calculus. Enter the size of the magnet and a position to measure the field strength. When I made these coils, I wanted to see if placing the coil in a cold place would tighten up the windings. If you use a 2-wire measurement the calculator assumes you have 0. This site is the official replacement for CoilCalculator by betterVapeTV. Simply specify. An example is a coil that is 1 inch long and has 8 turns of #24 wire "spaced" along the 1 inch length. Extension Springs: multiply the length of the spring wire per coil by the total number of coils. Set three, calculate the fourth. COM HVAC Wiz Calculator - Full function online calculator with fractions and HVAC units convertions. Easily Calculate Aluminum Coil Sizes, PIW, Area, Length, and OD Use the web tool (below) or download the desktop version. Download our "LA Coil Calculator" beta Smartphone App! (Android phones only at this time) We have been working on a mobile version of our coil calculator to help you while on the jobsite. This calculator uses a "K" multiplying factor value of. Wiring diagram for Series-Parallel wiring is for dual voice coil subs. 738 ScientificPapersoftheBureauofStandards. • • Calculate the magnetic torque magnetic torque on a coil or solenoid of area A, turns N, and current I force F on a conductor of length. JavaScript Tesla Coil Calculator Page This is the original Javascript Calculator program written by Jerry Gore in 1997. The half-wave dipole is very simple to construct. you will get the total cupper in one meter and multiply that with 1000. As a part of that process, it is important to establish proper testing procedures in order to maintain efficient production. Note: In Appendix X. Enter the length then click on Calculate to get the results. To clear up what A is. Use CoilCalculator. Note that the final wire length beyond the coil not only depends on the desired resonance frequency, the coil, and the wire length between the feedpoint and the coil: it also depends on the wire diameter and the wire insulation (velocity factor), installation height above ground, soil/ground conditions, objects below and near the antenna, etc. Appropriate and economical selection of pump requires accurate prediction of pressure drop in chilled water piping circuit and hence calculation of pressure drop is the initial step of the pump selection process. A common cylindrical form for winding large coils is 4 inch diameter PVC pipe. ) The distance the a screw or nut will advance every 360° turn. Simply specify. Convert easily between imperial and metric units for both coil and sheet measurements. Mostly because of the huge spike in people building their own coils. To Calculate Solid Height for Closed and Squared, Double Closed or Open Ends. Start by measuring the resistance of the length of wire. this video describes calculation of Required length of pipe for fabrication of coil on flat surface. To calculate the inductance, enter the coil diameter, the number of turns and the coil length into the calculator. The purpose of the calculator is to determine the generated frequency of the coil from the length of wire in the coil. Rely only on individual testing and not on the values reported using this braid calculator. ROOFING COIL. (The height of the coil form divided by the diameter. 812 mm Ø) enameled copper wire on a PVC core. a primary tank capacitor or topload capacitance to find the resonant frequency of the LC circuit. Learn how to take measurements for the best results. Multilayer Air Core Inductor Calculator Enter L, d, l and Wire Gauge (all four are required) to calculate multilayer inductor data. The outer diameter of the wire (with insulation) should be using in this calculator. This free surface area calculator determines the surface area of a number of common shapes, including sphere, cone, cube, cylinder, capsule, cap, conical frustum, ellipsoid, and square pyramid. ISO Certification © 2019 Clayton Metals, Inc. Moving between the boxes by clicking or using the 'TAB' button on your keyboard, will update the result. Calculation Length Of Spiral Curve | Spiral Length Equation Spiral bars are frequently applied in round columns, piers and piles. Coils in Concrete Layers. This is generally where the length significantly exceeds the diameter. To learn about the effect of the magnetic field on charged particles try our Lorentz Force Calculator. CBM Calculator is a free utility to calculate consignment's weight and volume. It allows the user to calculate the weights of carbon steel, stainless steel, copper alloys and aluminium alloy products of various forms such as flat sections, shapes and hollow sections such as tube and pipe. It is optional to add the capacitance for f. The approximate formulas used to calculate the inductance are provided along with restrictions on the relative size of the various parameters. compress the coil spring to any length shorter than it’s free height, with the shock fully extended, is referred to as preloading the spring. In designing and constructing the coil it becomes necessary to estimate the cross sectional area, and resistance of the coil. 0449788-gallons/foot of pipe to yield 205. I intend to roll the line length calculator into a future update for BeerSmith. If we know the height and diameter of the cylinder, we can calculate the helical length. In air conditioning plant, cold water is circulated through chiller (evaporator coil) where it reject the heat and then. It takes the ID/OD and gives you a lbs/in width. Inductance calculation references necessarily start with Maxwell’s seminal work [1], first published in 1873. It applies as long as the coil has a rectangular cross section. As an Englert metal roofing manufacturer, you must understand that the amount of coil you purchase is not a direct indicator of the square footage of roofing panels you will manufacture. All measurements are in mm. The angle of the spring coil relativeto the mounting base is found: f = atan [ C p / p D ] Compression Spring Design. Product Details. It is often used when large quantities of steel are needed, for example as structural steel. Coil Weight / PIW. This could be 50 ohm types such as RG58, RG8X, RG8, RG213, or 75 ohm type such as RG11, RG59, RG6 or even 75 ohm twin lead. It clears about everything. L= (d^2 * n^2)/(18d+40l) where: L is inductance in micro Henrys, d is coil diameter in inches, l is coil length in inches, and n is number of turns. "Popular wisdom" rules. We have a wide variety of Aluminum Coil Calculators available for use here. calculate water velocity in a pipe. This length will then be used as input to compute the total volume and surface area of the cooling coil and compare them to the tank volume and surface area. Enter the length then click on Calculate to get the results. 4 inch diameter form would have a 5:1 aspect ratio) See the Design Page for more information. We design and manufacture Light Gage Cut-To-Length, Multi-Blanking Lines, and Heavy Gage Plate Cut-To-Length Lines all of which can include either our Grip Feed or Servo Roll Feed Measuring. Things to look out for when measuring for collapsed length are chassis, link, tyre interference issues, overwrapping of the leaf-spring packs, and coil bind on a coil suspension. You can use this calculator to estimate how much wire is left on a spool. 75mm and 3mm filaments. Download our "LA Coil Calculator" beta Smartphone App! (Android phones only at this time) We have been working on a mobile version of our coil calculator to help you while on the jobsite. Coils in Concrete Layers. Practical generators almost always use a rotating coil geometry, and large scale power generators use something like a steam turbine or a water turbine to turn a coil of wire in a magnetic field, getting voltage generated in both sides of the rotating coil. Coil Calculator. COIL LOADING Loading coils can be installed anywhere along each leg of the shortened dipole. If you make a four-wire measurement the estimate will be more accurate. Immersion Coil Surface Area Calculator For Heating with Steam This steam heating calculator can help you determine the required surface area of an immersion coil using steam as the heat source. The calculated results are only to be used as a guide and cannot be guaranteed. What would be the formula to calculate coil/spring winding length with a constant pitch if the wire is a flat ribbon?. Use the Coil Calculator to estimate the amount of metal on a coil. Dual Rate Spring Calculation Guide. The main function of Coils selection module software is to calculate the performance of tubes and fins heat exchangers. Free Online Engineering Calculator to estimate the Inductance of a helical Coil. Also, printed psychrometric charts are available to order. It takes the ID/OD and gives you a lbs/in width. Calculate fluid flow and pipe velocities in a suction or discharge of a pump. Use 75 or 50 ohm cable to feed the centre of the dipole. Enter the desired operating frequency in megahertz to get a good starting length for a dipole in both feet and meters. The mean coil diameter can be calculated as. Mostly because of the huge spike in people building their own coils. aluminum coil weight calculation formula. To get started, choose an alloy and a form from the options below, complete the required information and hit the calculate button. The calculation refers to either a loaded 1/4 wave (typically a vertical, in which case flip the picture below through 90 o) or a loaded dipole, in which case the dimensions refer refer to one arm and two coils will be required. For wrapping coils. Description of the cooling coil for a)- Dx-cooling; b)- Chilled water coil (Aerofin heat transfer products). That means if the result is 6, the wrap wire length you need to cut is 6 times against the core. On our site you can calculate the weight of various materials on metal as close to real as possible. Notice that there is not a return path referenced in this inductance estimator. The number of turns of wire within the coil. Below the calculator you will find more explanation about the calculations. Our RFID coil antennas have been designed by us specifically for our RFID readers and transponders but can easily be used by hobbyists and professionals to. 4 inch diameter form would have a 5:1 aspect ratio) See the Design Page for more information. number of turns, the electric current, the length of the solenoid, to get the magnetic field inside of it. 065449 (OD^2 - ID^2) / T; where OD. Measure between the shock mounting points. I need to calculate the copper coil length which is wound on on a bobbin. Coil building calculators have become more popular and more advanced over the years. Coils Calculator. The main function of Coils selection module software is to calculate the performance of tubes and fins heat exchangers. accurately for their primary or secondary coils. Useful Formulae. 975 to adjust for the effect of antenna wire diameter on length which is applied to the free-space half-wavelength equation. This does NOT take into consideration the type or size of horizontal reflectors, of even if there is a need for them. Mostly because of the huge spike in people building their own coils. The hot-rolled coil passes through the pickling line, where surface scales (iron oxide layer) are removed from the surface of the coil to give an (attractive) surface finish to the steel. The calculated results are only to be used as a guide and cannot be guaranteed. Re: weight to length with copper wire The Std. Simply, the lumped model that is used to describe the inductance becomes inadequate as the wavelengths become shorter and comparable in length to the coil itself. Free calculator for coil builders to measure the wire length needed to clapton various types of core wires. This also serves to confirm that to measure the straight length of one coil, we must use the centre of the wire as the diameter we can calculate the coiled inches. Steel and Aluminum Coil Length & Weight Calculator Match the coil ID, OD dimensions on this useful calculator and read its material thickness, weight and length. These are the distances between spring ends when the spring is compressed to its maximum or minimum length when installed on the device. 65)= 21,890mils = 21. Coils Calculator. This hip roof calculator returns the value of the common rafter, the side rafter, the length of the hip, the off set of the hip, the height of the scaffold, and much more. Calculating Tesla coil Primary. All dimensions are entered in inches and all outputs will be in inches. Coil Calculator Inputs Coil Outside Diameter Coil Inside Diameter Coil Width Material Thickness Part Length in Inches Coil Outputs Total Linear ft in Coil. Immersion Coil Surface Area Calculator For Heating with Steam This steam heating calculator can help you determine the required surface area of an immersion coil using steam as the heat source. steelmillsoftheworld. With these information. Download our "LA Coil Calculator" beta Smartphone App! (Android phones only at this time) We have been working on a mobile version of our coil calculator to help you while on the jobsite. Most of the online calculators enable to find inductance of the coil knowing its winding dimensions and number of turns. Calculate the volume of C-Pipe coils Posted By: admin 0 Comment impet coil calculation , impet coil welding , limpet coil , limpet coil bending machine , limpet coil design , limpet coil design calculation , limpet coil length calculation , limpet coil making machine , limpet coil manufacturer , limpet coil meaning , limpet coil pitch , limpet. asked • 05/02/15 determine the length of wire in feet in a coil of 65 turns if the average diameter of the coil is 27. Heli-Coil screw thread inserts Heli-Coil inserts are preci-sion formed screw thread coils worked into a diamond shape. Sheet Weight. All measurements are in mm. 65)= 21,890mils = 21. This calculator provides a estimate of possible coil weight and strip length. From many popular antenna design web sites, we can see most people using the standard formula, 585/f (178. Come hear about lubrication, coil processing, tool coatings, and press/die requirements for higher strength steels from experts in the field! I'll be covering the many types and forming of SEE IT ON TWITTER I'm excited to be part of the global team working on V7 of the AHSS Guidelines!. Inductance calculation references necessarily start with Maxwell’s seminal work [1], first published in 1873. A member of the Reliance Steel & Aluminum Co. Yield Calculator. Here may be a solution. of pipe for that type. Diameter and length of inductor are entered in millimetres along with the number of turns. The SPRUNG WEIGHT is the weight that each shock is supporting (i. By Wheeler’s formula, the inductance for the 22 gauge coil would be. These terms are synonymous with Maximum and Minimum Working Lengths. You can calculate the amount of wire of width W needed to make a coil of radius R and length L by using the formula 2?R x (L/W). In air conditioning plant, cold water is circulated through chiller (evaporator coil) where it reject the heat and then. CBM Calculator is a free utility to calculate consignment's weight and volume. Simple to use Ohm's Law Calculator. The metal weight calculator from Industrial metal Supply asks for some basic info to calculate the weight in pounds of your metal. , the corner weight less unsprung weight). This calculator estimates the physical properties of a coil such as resistance, total length of wire needed and number of windings, give the wire diameter, and bobbin length. Select your gauge and fill in the measurements to determine the square footage, the lineal footage and weight. Spiral coil calculator Here you can calculate the inductance for a given size of a spiral coil wound in one layer. Mostly because of the huge spike in people building their own coils. Formula for the weight calculation of cable conductor is (Number of core x dia of conductor x 0. Note that self-inductance of a wire is often not measured since it is only a part of a circuit's loop. Set three, calculate the fourth. On the contrary, wires have a certain amount of resistance that increases with length and decreases with diameter. To learn about the effect of the magnetic field on charged particles try our Lorentz Force Calculator. 5mm, Wire Diam = 0. Immersion Coil Surface Area Calculator For Heating with Steam This steam heating calculator can help you determine the required surface area of an immersion coil using steam as the heat source. Getting the length of the spring wire depends on the type of spring you are working with: Compression Springs: multiply the length of the spring wire per coil by the total number of coils. Our spring calculator not only enables you to choose from thickness, width, arbor diameter, torque, stress and other specs, but it provides you with the cost to manufacture, for 10, 25, 50 or 100 pieces. Wiring diagram for Series-Parallel wiring is for dual voice coil subs. Here you can see the formulas that the calculator uses to calculate the inductance. In this situation, we can still calculate the coil length from the geometry of the coil. Keeping with the subject of your question, coil springs, the diameter of the wire and the length of the wire will give us the amount of steel used. 812 mm Ø) enameled copper wire on a PVC core. I have access to a lot of data from the coil, and tried thinking of a way to calculate using the inner hole diameter and the length and thickness of the steel strip. To clear up what A is. Now you can make quick calculations on how many feet or pounds of gutter coil you need for the job, or when restocking your inventory. Measure the length and width in feet, then multiply together to find the square footage. Soon enough 0. The calculated results are only to be used as a guide and cannot be guaranteed, entering incorrect values will result in an invalid result. G = E/(2(1 + v) The pitch of the spring coil can be found by. Place a 1:1 Balun on the Antenna end of the Feedline. To learn about the effect of the magnetic field on charged particles try our Lorentz Force Calculator. Panels are often measured in inches, use our inches to feet conversion calculator to convert to feet. This also serves to confirm that to measure the straight length of one coil, we must use the centre of the wire as the diameter we can calculate the coiled inches. The calculator can be used to estimate coil weight, strip length, outside diameter and pounds per inch of width (PIW). The magnetic field B is proportional to the current I in the coil. Description of the cooling coil for a)- Dx-cooling; b)- Chilled water coil (Aerofin heat transfer products). The result given from the calculator will be the ratio of the wrap wire against the core wire. Tank coils are not generally used for the continuous heating or cooling of a flowing stream, but are usually applied in the heating or cooling of a liquid contained in a tank on a batch basis. Wire length and coil frequency calculator is an online tool for electrical and electronic circuits to measure the Wire Length required and the Coil frequency based on the values of coil frequency in khz and wire length in feet respectively. Add and subtract inches (as a decimal or fraction), feet, centimeters, and millimeters. The simplest way to calculate the magnetic field of a solenoid is to use our calculator. Once you set lbs/in width to find total weight you read off the length that matches up to your thickness. Coil building calculators have become more popular and more advanced over the years. 339], and finding the size and shape of a coil which maximizes inductance for a given length of. Cutting coils does increase the spring rate. You will note that one is for long coils. This formula is for a wire antenna. 5 M/S is most often a good figure to aim for. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Getting the length of the spring wire depends on the type of spring you are working with: Compression Springs: multiply the length of the spring wire per coil by the total number of coils. It is often used when large quantities of steel are needed, for example as structural steel. Lower optimum L/D ratios (near unity) appear in systems where higher amounts of external capacitance load the system. Most of the online calculators enable to find inductance of the coil knowing its winding dimensions and number of turns. The calculated results are only to be used as a guide and cannot be guaranteed. As with the unwound spring above, measure the distance from the first coil on one end to the last coil on the other. Formula & Equations for inductance of air core inductor Calculator Inductance of an Air core coil inductor L = (N2 x d2) / (18d + 40l) … μH Where, N = Number of turns, d = Inductor Coil Diameter, l = Inductor Coil Length. When I was a kid I built my first crystal radio. This hip roof calculator returns the value of the common rafter, the side rafter, the length of the hip, the off set of the hip, the height of the scaffold, and much more. Input the cost per CWT to compare. L= (d^2 * n^2)/(18d+40l) where: L is inductance in micro Henrys, d is coil diameter in inches, l is coil length in inches, and n is number of turns. This point is called the self resonant frequency. If your coil is 3ft. The provider shall not be liable for injury, loss, or damage whether direct or consequential arising out of the use of the data provided herein. Below the calculator you will find more explanation about the calculations. The metal weight calculator is very easy to use on your desktop computer, your smartphone or iphone. CBM Calculator. These terms are synonymous with Maximum and Minimum Working Lengths. The simplest way to calculate the magnetic field of a solenoid is to use our calculator. Regarding the Coil Wrapping calculator: How is Leg Length measured? it says “total per coil,” does this mean the sum of both legs on either end of a coil? where does the ‘leg’ start?. in diameter. I have been asked by several people if I could sell silver mag wire by the spool [read this as the Vitter ]. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: