Builder Resources · Stevens Aeromodel
Builder Tools
Calculators and references for builders who like to understand the numbers, not just guess at them.
A growing collection of online tools that pair with the Learn It! Build It! Fly It! article library. Unit converters, loading calculators, and motor references — the math behind the framework, available at your workbench.
English ↔ Metric Conversion Calculator
Convert between English and metric units for length, weight, wing area, speed, servo torque, and temperature — live conversion in either direction.
Open the converter →
Wing Cube Loading Calculator
Enter your model’s weight and wing area to calculate WCL — and see which performance category your airframe falls into, from indoor slow-flyer to hotliner.
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Electric Motor Calculator
Motor constants, performance estimates, and propeller pitch speeds — the math that links your motor spec sheet to real-world results at the flying field.
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Covering Film Weight Calculator
Calculate the weight of iron-on covering film for wings, fuselage, and tail surfaces — and see how it affects your total airframe weight.
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Balsa Wood Density Calculator
Weigh a strip, sheet, or block of balsa and get an instant density reading with a grade classification — so you always know what you’re building with.
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Stevens Aeromodel · Builder Resources
Learn It! Build It! Fly It!
Laser-cut balsa kits made in Colorado — for builders who want to understand every part of what they’re flying.
