main rotor blade construction

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D Hillberg

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Annasten Texas home of Airbus

Airbus - A fiberglass D spar and plastic skins.

Bell - Aluminum D spar and aluminum skins B-206 & B-212 - B-407 Aluminum D spar and Plastic skins old Bell 47 steel strap and wood / Aluminum D spar aluminum skins

Hughes - C spar and aluminum

Sikorsky S-58 Aluminum D spar and Aluminum skin

GyroDyne - QH 50 Wood - Plastic

Robinson - Steel pipe formed into a D spar and Aluminum or steel skins ( aluminum's best)


What do you want to build???
 
Joined
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sittingbourne,kent england
thanks for your reply guys,need to make the blades for a pair of contro rotating rotor heads,this is to prove a new design of blade control,ianm just finishing a 50 inch rotor dia model prototype to prove the concept for my patent application on this design,i would like to turn my microlight chassis into a larger version as an experimental aircraft.i am 73 years old and have a couple of different projects going ,not aircraft but more on these later.my budget is limited so need help to produce blades a cost effective way,ask was an engineer aluminium may be best,although composite a possibility.
 

D Hillberg

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now comes the issue, do you need a flexible or stiff blade to handle the control input... Kaman? Hiller. Bell, Revolution... Standard swash plate. gimbled head, cross headed mast, imbedded star, ram air pressure servo ,servo flap. pezio electric servo or wobble plate. oh the choices of control. bet it has been done before :eek:
 
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flexible although stiff could do.what i have done does not seem to have been done before(patent searches)but unfortunately cannot share the design concept as this would put it in the public domain and would invalidate my patent claim,have to keep it under lock and key for about a year.,until patent applied for granted,but would like to start building an experimental single seater whilst waiting.
 

D Hillberg

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patent search? I'll bet that idea you have was done before... privet message me with a brief description as you have no data worth any advice - and your asking for blade construction is a clue of no tech
 
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have lots of technical and engineering and machining ability in a lot of light and heavy engineering(50years worth )and some knowledge of how blades constructed but never tried too make any,had patent agent making searches to see if any one has tried to or patented what i have come up with,no one has so far but cannot give out details to any one unless they sign a confidentiality agreement not to mention or give imformation to a third party or use the information themselves,this is on instruction from patent agents.
 

D Hillberg

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Lots of patents expire and manufactures close. History is full of devices from other countries and persons never associated with the patent office. and just because a patent is issued it doesn't guarantee it was ever built or used.


I have several pieces of R-44 blade pieces in Oxnard Ca. you can have...just pick them up.
 
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