Hi everybody,I am starting this thread not because I am building this contraption...my friend Gilbert on rotary wing forum is building one..I admit that this kind of helicopter was first built and flown by Austrian man Franz Schoeffman...
But since Gilbert is the only one whom I know as one of the builders,I thought it would be interesting to share his project on our forum...I have received some images via email from him and uploaded with my thread...the man in these images is Mr. Gilbert ( aka; Cita)...I hope to update with more images as he advances with his project..
-- Edited by tsheten8 on Saturday 2nd of June 2012 06:20:53 PM
These images are of the original Franz Schoeffmann backpack helicopter...the project I'm currently sharing on this forum will someday turn into something similar to those in these images!!.....
I hope to keep you all updated on this project..
This thing looks scary. Good luck, Tsheten, and do please be careful.
And tsheten, remember what I said elsewhere about linking to sources of your pics... this is important as it prevents accusation of infringing copyright.
Yippie Kai Yay, Mr. Falcon.
tsheten8 wrote:Stingray,I have finished fabricating the airframe of this chopper..I hope to post its images in a few days...
Stingray,I have finished fabricating the airframe of this chopper..I hope to post its images in a few days...
*spits out drink*
What?! Wow, Tsheten, that was quick!!
Where is the cyclic? How in the world do you stabilise it?
It has electronic controls. If you look at the grips along the tripod, you can see wires projecting from them to the engine area.
Well it doesn't have any cyclic or collective..its rotor blades are fixed pitch...and I believe that since this design incorporates co-axial rotors there will be no precession in the system..so it'll be easy to stabilize and control the contraption.....moreover,the axis of the rotor shaft passes through the CG of the pilot...he hangs from a gimbal joint and is free to move in all directions about that joint..that way he controls the helicopter...And there are no electronics on this chopper...the wires retroistic mentioned are actually rudder and throttle control cables...I hope to send pics of my heli soon...I have the images but they are of large size..having some problems uploading..regards,Tsheten8
-- Edited by tsheten8 on Monday 25th of June 2012 08:20:04 PM
My goodness!!!.just got the problem solved after doing some cropping and compressing..
Wow! Tsheten, I'm impressed. Very close to the original, and very well-put together. Good luck obtaining the rest of the requiterd parts! I can't wait to see when it's finished.
Thses images are of how far I'm into my project...
Just started work on the tail section...
Here is a temporary assembly of how the rudder control system will function..
Sorry I haven't gotten to that email yet, I had to deal with some serious life problems this week. Is it too late?
Hi Stingray,sorry for the late reply..it's okay regarding that email....making no progress these days on my backpack helicopter..regards
Από κάθε γενιά μεταξύ κάθε έθνος ανθρώπων, να θυμάστε νεκρών στρατιωτών μας.”
This thread has been dormant for quite a long time since i last posted..well,in this time,i had been making some progress,though not on the propulsion unit...i had been modifying my air frame..it's much lighter than it used to be..and i have also drawn some propulsion system..they are attached in my post..
my friend Gilbert has decided that he would need another engine for his schoeffmann helo..so he kinda started building a replica of the hafner rotachute but with an engine..he has finished making the body and also installed a little engine in a pusher configuration with a prop..only the main rotor remains to be completed..
Attached here with are some of the images I received from him via email..