At this time, I am stuck on finding a suitable gearbox for my model. Two types were used with one from a Honda motorcycle and one purchased from a local distributer. I haven't had much success in determining the "gear box drag" and it's effect on the autorotation of the blades. The blades won't spin-up in front of my floor fans when rotors are coupled to each other's gearbox. They spin-up OK when not coupled.I understand that mate, Just wondering how it all worked out?
bull shit. Tandems like to fly sideways , 200 kts been there - Fort Rucker test unit. Fritzy field - SAS not needed. only node weights.Andre;
I believe many have said that the early tandem helicopters, which were not equipped with Stability Augmentation Systems, were not the pinnacle of stability or controllability. Having read the patent, I suspect that his tandem gyrocopter will be no better and perhaps worse.
By God or by Darwin ~ Your choice
cog belts with a twist ? will workI have decided to change the gear boxes for drive belts. I am hoping to reduce the "drag" generated through gear boxes in the coupling of the rotors.
The drive belts were use on several homebuilt helicopters. The system has been proven for use on tail rotors, hopefully, it'll work on coupling rotor on my models.
There is one paten that I am aware of. I used the same configuration on one of my models with mixed results. I am not saying that it wouldn't work as in the paten because my model building is very sloppy at times. I did add several changes like blade overlap and different heights of the front rotor mast to get smooth airflow into the aft rotor. My only problems at this point is the coupling between the rotors and engines of appropriate horse power.Joe, your research regarding this setup looks promising, and after doing a quick google it looks like someone has put a patent on it?