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Permalink Reply by David Gitz on April 13, 2011 at 12:55pm

I don't know if this is still an active project.  My company is developing something along these lines.  You can check it out here:  www.icarusuav.com

If you would like to get involved email me at david.gitz@fastrobotics.com

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Permalink Reply by Gian Carlo M. on April 13, 2011 at 9:14pm

This is the biggest step towards the project I've seen: http://vimeo.com/22367120 :D
I haven't built my quadcopter yet, I plan on returning to this project this month.
It's been some time since I came here to DIyDrones, and it amazed me that they joined with AeroQuad to build quads (when I posted this there weren't multicopters at DIYDrones).

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Permalink Reply by Scott Howes on June 20, 2011 at 4:37pm

Greetings Gian

I am working on a multicopter that has a spar arm; no wing, that tilts 30 degrees forward, with inverted v tail. I'm basing the tail on the excellant work of reverendrichie. The COG will be way forward. Already have motors, ESCs. Batteries, charger, connector, and banana cables next. Flight controller will be Ardu/Wii. LOL! The hardest component to come up with right now is bearing mount for spar arm. Trying to decrease the non-horizontial profile of body during forward flight is the reason for the spar arm. Two gear surfaces, turned by step motor would be nice, but am trying servo and linkage. Will keep posting progress, and good luck with your project.

Scott.

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Permalink Reply by Jason Dorie on September 16, 2011 at 2:52pm

I talked to the MaxVTOL guy a bunch while he was working on it.  The biggest issue I believe he encountered was getting the CG right in each flight mode.  A quad ideally has a centered CG, but a plane's CG is typically at about 1/3 the chord of the wing.  Max's approach was to put the motor weight high so as they rotated forward they also pulled the CG forward.  He had it working in a simulator, and was building physical shells for the body, but I don't know how far he got.  The Osprey configuration will have the same issue with CG, but there you have more flexibility - the CG in hover is ideally between the two lift motors, so you could put them right at the forward flight CG if you designed carefully.

 

Here's MaxVTOL's build log:  http://www.rcgroups.com/forums/showthread.php?t=782929

 

And yeah, I'm interested in this.  :-)

 

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Permalink Reply by Scott Howes on September 25, 2011 at 12:44am

Greetings Jason. Glad to hear I won't be the only one crashing this type of bird. I will check out the MaxVTOL link, The name sounds familiar. I believe this can be done but, by the lack of others that have gone before us...this must be a difficult design. I agree that the COG must be under the main lift motors. That would be right under the spar arm bearing rings; which are being difficult to find, lol. Having the COG as described, would reduce action on body as the spar turns 30 degrees forward. As I understand, having COG close to the lift, reduces overall effect. A lever with a very short handle. The back rotors will have to be finely programmed to respond quickly, or the aim of stablizing body/fuselage will not be reached.

Good to hear from you.

Okay. Just checked out the thread you mentioned. Thought I had seen that name. I have this project posted there too. His is more ambious than mine. The only moving part not a prop will be the arm the two front motors are mounted to. My tail design is borrowed from Copterrichie on You Tube.

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