Project Ladybug

btd1982

Gold Supporter
Joined
Jan 28, 2021
Messages
182
Location
Devon
Aircraft
Home built helicopter
Total Flight Time
0.5h
Hello folks,

I am preparing for an investor presentation but I have not been able to find details of a good coaxial gearbox design for my coaxial type helicopter. I am looking at Nolan, AirScooter and Gen4 and similar designs. There are some others too but I don't see very legible visuals of them. I need to know which one is robust and reliable and to see details which can be copied, please.

Fixed pitch blade, counter (contra) rotating, coaxial.

Nolan-51HJ-Coaxial-Pendulum-Multi-Engine-Helicopter.jpg

Japan.jpg
airscooter.webp



My own webpage showing links to similar designs

Similar Designs
Can I ask why you want the gearbox ?
Sch2a and micron helicopters for example.
 

Asker

Active Member
Joined
Dec 10, 2021
Messages
146
Location
İstanbul
Can I ask why you want the gearbox ?
Sch2a and micron helicopters for example.

I mean the top gearbox not the one for RPM reduction. In my design the engine sits at the bottom and turns a shaft going up through a mast to the rotor. So, very similar to Nolan design. the box between or just under the rotors is what I mean.
 

Asker

Active Member
Joined
Dec 10, 2021
Messages
146
Location
İstanbul
Nolan patent is not very legible to me. It is different from basic designs but I don't understand how the gear works. Just trying to see if they have something better there. They have paid the last maintenance fee in 2015 so it is free to copy now.
 
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