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Old Dec 24, 2011, 01:59 PM
multi-rotor man
arrio's Avatar
USA, VA, Newport News
Joined Jan 2002
150 Posts
Quote:
Originally Posted by taghipour View Post
let me to tell you how it can fly!
any changing of lift can produce by velocity of rotating of blades just like quad copter.
forward & backward motion is due to rotating of axis of propeller about pitch. and lateral motion is due to tilting of axis to side.
and finally for turning about yaw, it will happen by reaction of the rotation of each rotor
now i just wanna know which gyro is better in my condition?!?
If yaw is by torque reaction between the two rotors, won't that induce a severe roll input? Increasing the torque (rpm?) on one rotor will also increase the lift. How will you correct the roll reaction?
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Old Jul 27, 2012, 10:19 AM
Registered User
Joined Jun 2012
6 Posts
Quote:
Originally Posted by topgun21 View Post
I was curious if anyone has started working on designing a model of the Aerospatiale SA-2 Samson VTOL as seen in the new movie Avatar?
Do you think it would be easy to do? The rotating rotor clusters would need to be controlled by the Elevon mixing function in a computer radio. Any ideas on motors, rotors, etc? Anyone?

Yes I did, and it takes me 3 months of planning and building, but actually it is not a BiCopter anymore, it is a TriCopter now with a small fan in the tail to stabilize nick. So it can hover much more better and I can control it better than before (as it had the two rotors only). It had its maiden flight yesterday, but I have a lot of work now to get a better setup of the flight control board. The Samson is 880 mm long and 800 mm wide and have a weight of 1400 gramm. Board is KKmulticopter, 2 brushless park 470 with 9"x5" 3blade GWS, a 45mm EDF, 2 pcs 3Sx2200 Lipo, a lot of Depron and Vivak and UHU-Por :-)







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Old Jul 29, 2012, 02:06 PM
Registered User
Utah
Joined Sep 2009
499 Posts
AWESOME!!!

Love it!
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Old Jul 29, 2012, 10:37 PM
I even seen a house fly!
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Montreal!
Joined Oct 2003
2,680 Posts
I wanna see vids!
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Old Nov 30, 2012, 07:56 PM
Registered User
Spain
Joined Nov 2009
36 Posts
A questions....

is necessary the three blade propeller for a vtol flight stable ????
(for the gyroscopic effect work)

thannks
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Old Dec 01, 2012, 04:13 AM
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Joined Oct 2004
2,726 Posts
A three bladed prop is not more stable than a two bladed prop, but seems to cause fewer vibrations, especially during pitch and roll changes. I think this is because its mass, and therefore its inertia, is distributed more evenly.
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Old Jan 03, 2013, 06:09 PM
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1967250s's Avatar
United States, VA, Alexandria
Joined Sep 2008
987 Posts
COOL! What did you use to make the fuse? Vac form? Any build pics?
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Old Jan 07, 2013, 03:09 AM
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SONICX's Avatar
South Africa, GP, Krugersdorp
Joined Jul 2012
168 Posts
Now that looks awesome.
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Old Jan 11, 2013, 02:14 AM
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Mr Krinkle's Avatar
Australia, SA, Adelaide
Joined Sep 2008
392 Posts
Flite test posted this video a little while ago.

Flite Test - RC Avatar Gunship - PROJECT (8 min 46 sec)


Doesn't look like its terribly stable though and they don't appear to have any continuous footage of it...
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Old Jan 11, 2013, 06:59 PM
Will fly for food
ilektron's Avatar
United States, CA, Carlsbad
Joined May 2011
532 Posts
I never realized how chopped up the footage was of that thing. I need to get mine back in action and actually make it look pretty. Function before form, though, right?

Final Flight of the Fixed Pitch Scratch Built Tiltrotor (1 min 36 sec)
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Old Mar 15, 2013, 02:30 PM
Registered User
Joined Jun 2012
6 Posts
Quote:
Originally Posted by 1967250s View Post
COOL! What did you use to make the fuse? Vac form? Any build pics?
Yes I build a VAC-Form for the parts like this, the master-form is made from wood, the fuselage is made with Vivak 0,5mm:



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Old Mar 18, 2013, 01:50 AM
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South Africa, GP, Krugersdorp
Joined Jul 2012
168 Posts
Nice plugs and molds.
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Old Jun 02, 2014, 04:47 AM
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Arkhangelsk, Russia
Joined Apr 2009
38 Posts
I'm building a SA-2 Samson from the movie Avatar. Link to the forum, though in Russian, but a lot of photos.
http://forum.rcdesign.ru/f124/thread364136.html







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Old Jun 03, 2014, 04:20 PM
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Joined Aug 2007
4,075 Posts
Nice details. Will this be a tricopter or DualCopter?
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Latest blog entry: Chupacabra sighting !!!
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Old Jun 03, 2014, 05:14 PM
Registered User
Arkhangelsk, Russia
Joined Apr 2009
38 Posts
This will tricopter, in the tail is a small propeller.





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