Anybody has more info about this Chinese helicopter? seems very interesting, wonder what gear box and rotor head is this?
Regards
Regards
I have some pics of it from when it was at Anthony's place. not sure what he ended up doing with it. I just sent him an E-mail with the Video link.I remember the Nolan brothers coaxial story received a warm welcome at Oshkosh once they went public, and then...nothing! It seems like yesterday, but clearly I am getting old because this video now looks very dated. Does anyone know what happened to this project? Helo's that cannot autorotate are doomed to failure it seems, nobody takes them seriously, but I do remember a BRS chute was later incorporated into this design!
https://www.youtube.com/watch?v=B21Xk6tNcBw
And according to this video they won an award at the 32nd Annual PRA Convention! - long before I was a member!
https://youtu.be/0QHfBucsL0Q
Helo's that cannot autorotate are doomed to failure it seems, nobody takes them seriously]
I can't see why it would be, the ch7 with the 912uls work fine nd they have the power gobbling TR also.The Rotax must be working hard no wonder the plethora of coolers
Ok I have what is obviously a stupid question, but , why can these not auto?
Ok there you go, I didn't know that, so they are a set pitch, nd to go up rev the motor faster, go down idle the motor back?The Nolan has no collective control. The rotors stay in engine-driven flight pitch all the time, and that's way too much pitch for autorotative flight.
Ok there you go, I didn't know that, so they are a set pitch, nd to go up rev the motor faster, go down idle the motor back?
I bet many of you are regular helicopter pilot; does anybody flown a Coaxial?
I mean if what the western is saying is true; how come in Russia still fly this things since 1947? heck, you can buy one for very little money with a payload of 1400Kg...
how does Coax deal with.
1.- YAW (I mean, I know changed the pitch of one set of blades to produce torque in each direction, but I meant, is it as important now that there is no TORQUE to deal with)
Answer, yaw reversal in Autorotation, more maintenance and rigging, More complex system.
2.- DYNAMIC ROLLOVER. ( does it even exists??)
Answer,: Yes like any other helicopter it WILL and does roll over ,China lost one not too long ago.
3.- PAYLOAD.
Answer: :der:not as much as a conventional helicopter (main gearbox issues) 1400 kg? for the installed horse power? get me a Super Huey
4.- Dissymmetry of lift.
Answer: rotor tip clearance limits blade flapping, and mast bending forces are more
5.- Gyroscopic momentum.
What? :twitch:
6.- Hovering. ( is it as complicated as the TR helo?)
Answer :weathervane effect and mixing rotor wash a wallowing whale
7.- Autorotation.
Answer :like any other but yaw reversal issues even with special linkages.
8. -Flying backward.
Answer :Any helicopter can fly backwards 133 lift work they do it all the time and with those bag tail fins on a Kamov PITA ! better with a tail rotor even the Russians don't use a coxael in heavy lift work:rant: