Exp asked in Cars & TransportationAircraft · 9 months ago

Why cant you copy an airplanes wing geometry for your own miniature plane?

8 Answers

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  • 7 months ago

    Some wing geometry only works due to speed. Where a jet fighter can go 1000 mph your little miniature plane can not come even close. You need to scale the wing shape for the speed the model can actually fly so that it remains stable for the speed that it is going.

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  • 8 months ago

    I am pretty sure this has been done tens of thousands of times in the RC airplane hobby world

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  • 9 months ago

    Because the reynolds number is different onsmalller scales....different airfoils for different speeds and size....

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  • JetDoc
    Lv 7
    9 months ago

    Who says you can't?

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  • 9 months ago

    Aerodynamics is different. Reynolds number vary so much with scale that we have to adjust for it in wind tunnel models, as the results would not readily transpose.

    Then there is the size factor.

    Make your model plane 10 times smaller than the full size aircraft, and the mass (if proportional) is dropped by a factor of 1000 and the wing area by a factor of 100, so proportionally, you have an excess of lift for a given speed.

    So you would fly slower, but that ALSO changes the Reynolds number, in the same direction that the smaller scale did.

    Source(s): Aerospace engineer
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  • Bill
    Lv 6
    9 months ago

    you can

    there is no patent laws on wing profiles

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  • Lv 7
    9 months ago
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  • 9 months ago

    Made from different materials. Planes would have different weights, even if adjusted for scale. Different power source.

    Operates at vastly different wind speed.

    Reynolds number would be so different, your plane might not fly at all. Even if, the efficiency might be quite low.

    Source(s): Some work in high school with low speed wind tunnel, then hypersonic one at Cal Tech. My friend and mentor got the first aeronautical engineering degree ever from Cal Tech, worked for many aerospace companies, then the Rand Corporation as researcher and consultant for secret military projects.
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