I did build and fly for 1100 hours a fiberglass homebuilt aircraft (Cosy=20
Classic) (3 people, 200 mph, 1000 mile range). As part of that I built=20
several wooden propellers plus tested propellers for one of the major=20
manufacturers of props for certified aircraft, and I can say that slight=20
changes in the shape of the blade can make big changes in performance.=20
The design of a helio.. blade is very complicated, in the structural=20
strength area there are tensile and torsional stresses (and others),=20
resistance to deformation (need to maintain shape), and not come apart.=20
Then there is the issue of flutter, when the blade deforms in a=20
direction to then force itself in the wrong direction, oscillates, and=20
tears itself apart. Not saying impossible to build your own blades, but=20
very difficult.  One would need to make a mold first, and that in itself=20
would be a major undertaking. :)
On 10/8/13 7:58 PM, Isaac Marino Bavaresco wrote:
> I think it is feasible (although hard) to build your own main rotor blade=
s.
> All it takes is a mold, some carbon fiber (or glass fiber) cloth and resi=
n.
>
> A friend of mine builds model jet plane bodies and wings. I guess he can
> build large-ish blades, given enough motivation.
>
>
> Em 08/10/2013 20:36, Carl Denk escreveu:
>> Could be just the tail rotor blades with the cyclic functions be a
>> result of the swash plate assembly that has been discussed, but these
>> blades are very long, and I doubt they are from a production chopper.
>> Can someone supply a heli... model that would have tail rotor blades
>> that long. :)
>>
>> On 10/8/13 7:13 PM, Isaac Marino Bavaresco wrote:
>>> That seems unlikely, because the tail rotor lacks a cyclic control, it
>>> has just pitch control.
>>>

--=20
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