Re: [indoor construction] VP or VD

From: Slobodan Midic <slomi_at_EUnet.yu>
Date: Mon, 23 Oct 2006 21:13:51 +0200

Thank you Bill and Nick,

You have right, at known constructions of VD prop, that means at folding VD
system and at sliding VD system, you have only translation movement the
prop blades near to prop axis, and "the P value isn't constant", nor P/D
value also. But if the progressive movement of blade is combined with some
blade rotation in the same time for some angle round the blade spars, at
some predetermined low, maybe can you achieve, P/D=Const., during changing
the prop diameter. I don't have the solution for that VD prop, that is
something imaginary, but it can be solve, only the question is, have this
some sense or not. My impression was that VD prop have better potential for
flying with optimal prop efficiency at different working regimes than at VP
props, and maybe is that criterion P/D=Const.

I excuse to the group with my hypothetical questions, maybe it is not
interesting ....

 Thank you,
With compliments,
Slobodan Midich, dipl.ing.
Received on Mon Oct 23 2006 - 12:25:00 CEST