Does anyone remeber: an owner of a big successful machine shop(?) out in California made a dual rotor helicopter that he said anyone could learn ro fly in less than an hour. he referred to it as a commuter helicopter for traveling the airways between cars & airplanes. it was featured on Discovery TV probably over 5 years ago?
This contra rotating configuration is for a reason you won't get any simpler than this, the gearbox inbetween the rotors is a reversing unit for the lower rotor only, the top rotor is direct from the drive.
Where did you get your coaxial gear box from?? I need a few of those making my own is taking up way to much time when i'lm not sick in bed. Anyway help will be great. May the Gods bless us all some more then others.
Had a nice talk with the Brothers, It's safe because of the twin engines, I said not if you gas up with contaminated fuel.. That got their brains thinking... Interestng machine
This, is a great little machine , notably roter is a very attractive idea , however , no cyclic ? Collective ? I would like to know more ( I am a commercial pilot, aircraft ,multi - engine , complicated single engine , acrobatic endorsed )
I love it..I want to know if there’s a foot pedal.. if there is, then can you make a video on what’s its function in coaxial helicopter.. or just show pressing it and which part moves or explain what happens..
The foot pedals control hard left and right turns via the rudders at the rear of the rotor wash and also the left and right tilt of the rotor head 'swash plate' equivalent device just underneath the rotors.
Quite possibly the most well flown home-made aircraft that I have ever seen, great job, however, the cyclic of the blades puts them too close to eachother for me to deem this safe to fly. I bet larger rudders would be more responsive and placing the rotors further apart would make this safer to fly. Love it!
@Eddie Hitler I assumed they're fixed in collective pitch but is there no cyclic? He seems to steer using a stick for a reason so there's clearly some control scheme involved that makes the rotors tilt with their tips nearing one another
I wonder if using concentric drive shaft and belt drive such as the way the very first paraplanes counter rotated its 2 pusher props would be simpler than this really sophisticated transmission?
The heart of this machine is the planetary coaxial gearbox between the rotors. an expensive complicated unit to make. beyond the realms of the home constructer. thats what this machine is all about....Curtis
Yes,expensive and complicated, but very nice,we need someone like the designer of the Mosquito,he is one of those people that has the ability to simplify complex assembly's,in both cost and manufacturing.
What about autorotation? How do you dump collective and forward cyclic if the engine quits? Should you make out your will before you go up? How do you spell hairball aviation?
Just what we all need. A helicopter anybody can fly. The caveat is, a helicopter that anybody can fly, but a helicopter that Isn't capable of Autorotations. I don't want to hear about two engines. Not taking that chance with one, two cycle engine LMAOoooo. Thanks for posting it was good entertainment anyway.
I read it was supposed to have a ballistic parachute installed in a production variant, also how many times do you see a helicopter successfully auto rotate to a safe landing, virtually never, that's because the only time its possibly is due to a perfect engine out scenario with a perfect altitude and no other mechanical complications effecting the incident - which hardly ever happens. It's mostly wishful thinking and a coping strategy.
As i have siad before the eccence of that machine is the planetary reversing gear box between the rotors it is difficult to make. theres no mystery about it .. . Peter
It basically is a gyro rotor head. Gyros don't need counter rotating blades since they are unpowered. But build a model and find out how well it works.
WITH A FIXED PITCH ROTOR SYSTEM YOU are betting on an absolutely 100%reliable engine running, never ever ever fail, there will always be something, out of fuel, a bad spark plug, any hiccup absolutely guarantees a sad day for your family and anyone watching, any machine you build should be capable of auto rotation,
