http://www.rcgroups.com/forums For Vertical Take Off and Landing aircraft. en Mon, 23 Nov 2009 16:53:50 GMT vBulletin 60 http://www.rcgroups.com/forums/images/misc/rss.jpg http://www.rcgroups.com/forums http://www.rcgroups.com/forums/showthread.php?t=1145903&goto=newpost Sat, 21 Nov 2009 14:41:33 GMT I came across an article in AviationWeek magazine about some models produced by Aurora Flight Sciences called 'Skate' and 'Mamba'. Below is a description and a picture of the Mamba from the aviationweek article. I was wondering if anyone had tried to replicate it and with what success.

"Aurora Flight Sciences... Some of the company's "skunk works" engineers, not long out of MIT, present a backpack UAV concept that pushes the envelope of what flying machines look like."

"Mamba has been designed to provide a simpler, more compact design for a ducted-fan UAV. With twin counter-rotating two-blade rotors and a four-segment folding duct, Mamba collapses into a small volume. Its most unusual feature, though, is a "suck and stare" mode: it can fly into a ceiling and wall and use the fan to stay in place, using less power than hovering."

]]> VTOLs MikeinMiss http://www.rcgroups.com/forums/showthread.php?t=1145903 http://www.rcgroups.com/forums/showthread.php?t=1143832&goto=newpost Tue, 17 Nov 2009 14:38:08 GMT http://velkovelkov.blogspot.com/2009/09/entoid.html http://velkovelkov.blogspot.com/2009/09/entoid.html ]]> VTOLs Velko Velkov http://www.rcgroups.com/forums/showthread.php?t=1143832 http://www.rcgroups.com/forums/showthread.php?t=1141444&goto=newpost Fri, 13 Nov 2009 01:26:22 GMT I just ordered the plans for this bird and will start the build once they arrive https://secure.rcstore.com/pcd/eServCart?iServ=MDY3QUo0NjYzMSZpUGFnZUlkPTc4NjgyJmlJbnZJZD0yNzU0MiZpU2t1TGlzdD0maVN1YlRlcm09MA== Anyone here build one before? I just ordered the plans for this bird and will start the build once they arrive https://secure.rcstore.com/pcd/eServ...N1YlRlcm09MA== Anyone here build one before? ]]> VTOLs jwhitacre http://www.rcgroups.com/forums/showthread.php?t=1141444 http://www.rcgroups.com/forums/showthread.php?t=1141219&goto=newpost Thu, 12 Nov 2009 17:54:13 GMT Hello everyone, I would like to discuss the advantages and disadvantages of the two different types of anti torque. These are: -First one that is found in most vtols: simple anti torque airfoil vanes., they are simple to build and can be made light. -Second one is the tail prop/rotor. not... Hello everyone, I would like to discuss the advantages and disadvantages of the two different types of anti torque.

These are:

-First one that is found in most vtols: simple anti torque airfoil vanes., they are simple to build and can be made light.

-Second one is the tail prop/rotor. not many vtols are using them but they still are used once in a while. they will produce enough torque! but may be a bit more complicated and draw more power?

The question here is, which way is the most efficient, which way is the one simply put draws less current? Vanes seems to be Power Eaters compared to tail devices but the tail rotors are heavy. or wait.. do the tail rotor pulls more amps?

(this thread should be removed from where I originally posted by mistake in Electrical combat forum but still it isnt moved so I posted it here)

Kalle ]]> VTOLs Sky-walker http://www.rcgroups.com/forums/showthread.php?t=1141219 http://www.rcgroups.com/forums/showthread.php?t=1139462&goto=newpost Mon, 09 Nov 2009 09:11:48 GMT More like a quad tilt motor or propeller project.

It's a little early to show but knowing how these projects don't always make it to completion, here is my current VTOL attempt.
It's just a quad copter at the moment but this was a short motor tilt test to see if the quad was still stable.
Now to put some wings on it.

The motors are directly bolted onto the servos, yes I know this is a bad idea:)
So far I'm surprised with how well the servos are holding up. How well they perform during flight is another story.

Next version will have the motors supported by a shaft before the servo like VTOLman and maxvtol have done to name a couple, both of whom have amazing projects!

Parts list...
2- W-150 Power servos on the back.
2- Hextronik MG-14 14g/2.2kg/0.11sec servos on the front. (I didn't have any more Waypoint servos:()
1- Firmtronics (Retract180 180-Degree Servo Driver). This thing works great! ]]> VTOLs RCvertt http://www.rcgroups.com/forums/showthread.php?t=1139462 http://www.rcgroups.com/forums/showthread.php?t=1136621&goto=newpost Tue, 03 Nov 2009 21:28:20 GMT Hi,

I'm new here and to building VTOL models. I was wondering if anyone has any ideas on the best way I could tilt the wings on a tilt wing aircraft I'm currently working on. The wing span is about four feet and there will be a spar running most of the way through it. I need something with a lot of holding power for the vertical and horizontal modes, but fast enough to get through the transition mode without any trouble. Right now I am thinking of trying something with worm gears, but I don't really have any experience on this matter.

Thanks in advance! ]]> VTOLs blackbird87 http://www.rcgroups.com/forums/showthread.php?t=1136621 http://www.rcgroups.com/forums/showthread.php?t=1136524&goto=newpost Tue, 03 Nov 2009 17:36:07 GMT No idea if they are already available. http://www.art-tech.com/english/ArticleShow.asp?ArticleID=259 http://www.art-tech.com/english/ArticleShow.asp?ArticleID=252 No idea if they are already available.

http://www.art-tech.com/english/Arti...?ArticleID=259
http://www.art-tech.com/english/Arti...?ArticleID=252 ]]> VTOLs elossam http://www.rcgroups.com/forums/showthread.php?t=1136524 http://www.rcgroups.com/forums/showthread.php?t=1133615&goto=newpost Thu, 29 Oct 2009 05:53:53 GMT I was thinking of an easier way to control a STOVL EDF jet than useing ducted fans on the wingtips for roll control and useing differential throttle on numerous fans for pitch roll etc. Ive tried this a few times and just seems to be too many issues to be simple. What if you put a large single... I was thinking of an easier way to control a STOVL EDF jet than useing ducted fans on the wingtips for roll control and useing differential throttle on numerous fans for pitch roll etc. Ive tried this a few times and just seems to be too many issues to be simple.

What if you put a large single EDF centered on the CG for vertical lift only, and use a second EDF in the conventional location at the rear of the jet but use thrust vector paddles at the exhaust exit to control pitch roll and yaw? Why couldnt a single thrust vectoring setup work to control all three axis while the main lift fan simply prvides vertical lift? I cant think of a reason why this wouldnt work. Granted the rear fan will be pushing the model forward continuously while the center fan lifts it, which is why i think it would only work for STOVL and not VTOL. But you could theoreticaly hold it in a high alpha with both fans provideing some vertical lift for a vertical landing.

Unless someone here tells me im crazy and explains why this cant work i think i will use this as my next experiment in the search for a successfull STOVL / VTOL. ]]> VTOLs cray2602 http://www.rcgroups.com/forums/showthread.php?t=1133615 http://www.rcgroups.com/forums/showthread.php?t=1132087&goto=newpost Mon, 26 Oct 2009 14:34:21 GMT Hello guys,

I've only been posting on the RC boat forum before, where I have done two builds, Billing boats "Banckert", and Robbe "Happy Hunter".

I just bought this:


From what I have understood this is a remake of a model available in the 70-ties...? Currently available as a limited edition.

This is the bigger 1:96 scale model. There is also a similar 1:144 scale model.

I hope I can post the build here, or is there a better forum for this?

Thanks
Andreas ]]> VTOLs bayerische http://www.rcgroups.com/forums/showthread.php?t=1132087