PPRuNe Forums - View Single Post - So you really truly want to build a better helicopter?
Old 12th May 2005, 04:12
  #15 (permalink)  
Graviman
 
Join Date: Nov 2004
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"Here is one idea for a 2/rev blade root control"

Way way too complicated! Prove out the basic concept of blade twist first. Twin swash plates will be hard enough to package, especially in 2D. I think servo trimming, with 1P mechanical, makes more sense anyway - what if the aircraft suffers total electrical failure, from say a solonoid jamming? Anyhow would you subcontract the control system to DARPA or NASA, to get the blade cyclic AOA to match CFD streamline predictions?

You were a powertrains man, and must have seen a few modes of failure in your time - something about keeping it simple. Bladetwist could, as an example, introduce unwanted flutter due to the need to keep stiffness down. The reverse flow region could cause divergence. The circular root may prove to be unbeliebably draggy. The dreaded coriolis monster is always lurking. I understand where you are going, but just suggest a very methodological approach.

Still, good luck getting the IRAT blade to work.

Mart
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