Project Ladybug

btd1982

Gold Supporter
Joined
Jan 28, 2021
Messages
188
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
147
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
147
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.
 

Asker

Active Member
Joined
Dec 10, 2021
Messages
147
Location
İstanbul
Hello all,

No luck with the investor. I didn't get a chance to do a presentation. My neighbor who was going to arrange a meeting never did it. So I am still looking.

Gofly corporate website was down for months and it was not encouraging either.

I have redesigned the Ladybug to be completely composite with few metal structural parts. It looks totally different now. I had delayed the casting of the first rotor blade to see if a cash injection is coming for nothing. Now I took it up again and I will cast it soon hopefully. I made some changes to the blade to facilitate the making procedure. I will use the materials that I had initially bought. The cloth is a little short for the new structural design of the blade but I will take it as an experiment rather than a final make as I need to make more of them to even test them for lift performance. I will likely only be able to test it for strength and process quality. It will show how much strength I will get with minimal fiberglass material. Also because the weight of the system will be distributed between 8 blades this time the strength of each blade can be lesser and the making can be easier while also the weight of each blade will be smaller.
 
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