![]() “Volume is a measure of the amount of space that a substance or an object takes up. If the strength of gravity is held constant (as it is all over Earth), then an object with a greater mass also has a greater weight.” The force of gravity on an object depends on its mass but also on the strength of gravity. Whereas mass measures the amount of matter in an object, weight measures the force of gravity acting on an object. The two are closely related, but they measure different things. ![]() Reynolds points out, the term weight, as we commonly use it, is really a cubic function based on the volume of a mass. The WCL comparative value, or even WAL, has little to do with the aerodynamics needed to get the model to fly at various sizes/scales in real, un-scaleable air.Īs Mr. Reynolds notes in his article, some people feel that it is a better “flyability” indicator than wing area loading (WAL) expressed in oz./sq.ft. Wing Cube Loading (WCL) provides a comparative value which can be used as an indicator, or a rule of thumb, for grouping radio controlled, miniature, aircraft by similar flight characteristics and “flyability”. We should be, and many modelers are, comparing planes by their wing cube loading, which is independent of size because both the numerator and the denominator are cubic.”įrancis Reynolds, Model Builder, September 1989 The problem is that we are dividing weight, a cubic-like function (weight is proportional to volume which we measure in cubic feet) by area, a squared function measured in square feet. ![]() “ Wing loading is a lousy way to compare models with each other and with full-scale airplanes, because wing loading varies with the size of the plane. This is revised, updated and added information from the CWL section “Wing Cube Loading (WCL)” in the article “One Way of Selecting a Brushless Outrunner Electric Motor for a Radio Controlled (RC or R/C) Sport Plane or Sport Scale Plane Using ANR26650M1 (A123 Systems NanophospateTM lithium ion) 2300mAh Cells”, by Ken Myers, December 2007 Ecalc.ch – Performance Calculators for all RC Aircraftīy Ken Meyers (Reprinted from the June 2018 Ampeer). ![]()
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