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Old Nov 05, 2013, 02:59 AM
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Why I need all that? Because I want flight my 2,2 m fighter at small green area my backyard.
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Old Nov 06, 2013, 07:43 AM
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Originally Posted by MrJan View Post
Thanks aero1960, but I already have transmitter mixer. I have it as you said, but instead of 2 step modes I have 3 step modes. (I would like to have stepless modes, but let's see if 3 steps modes is good enough).

I also have servo speed controller. I think slower tilt servo speed is better when takeoff. Because it take time to accelerate aircraft to foward flight. So I can set the appropriate servo speed for that. After vertical takeoff I can push nacelles tilt button full foward and thats it. Aircraft accelerate and hold altitude until it has enough foward flight speed.
I have decided on mine to use about 2 seconds to go from vertical-horizontal and about 2 1/2 seconds the other way. Reason being you have quite a Vx speed and need more time to slow it down. I expect quite a bit of nose down as the wing loses lift and turns, so I will lead off with up elevator as I flip the switch.
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Old Nov 07, 2013, 02:03 AM
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I have used about 3 seconds transition, but I don't have enough test flights to say if it's best time delay. I think the question is more like, how you want to flight. Slow transition means smooth flight. Fast transition might enable you to do tricks. I can't do any VTOL tricks but I can imagine someone will some day do so.Tight VTOL manouvers might look cool.
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Last edited by MrJan; Nov 07, 2013 at 06:14 AM.
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Old Nov 08, 2013, 12:24 PM
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This video shows about 70 degrees transition. Flight path is about 15 m radius arc. (Sound has been changed just for fun).

MrJan's YF-23 STOVL 70 deg transition (0 min 44 sec)
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Last edited by MrJan; Nov 08, 2013 at 01:43 PM.
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Old Nov 11, 2013, 06:06 AM
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Old Dec 22, 2013, 09:14 AM
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Mr. Jan, Your project is coming along very nicely.

It looks like your Jet is capable of VTOL. Have you tried vertical take off and hover in no wind yet?
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Old Dec 22, 2013, 11:38 AM
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Originally Posted by leadfeather View Post
Mr. Jan, Your project is coming along very nicely.

It looks like your Jet is capable of VTOL. Have you tried vertical take off and hover in no wind yet?
Sorry to say. It is not jet. It is sound dubbed jet - just for fun. But yes it is capable of VTOL even though it is not practical VTOL because of heavy weight. And I never done full 90 degrees transition. I have done only 70 degrees transitions.
MrJan's YF23 First VTOL test (0 min 17 sec)


Only onboard "computer" is 3 axis gyros.
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Old Jun 03, 2014, 10:05 AM
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Originally Posted by aero1960 View Post
Here is my STOL EDF that rotates up to 45 degrees for short takeoffs and lands steeply by me rotating the EDF by a servo.(no gyro at all). Range of servo is +45 up and -15 below airplane. I control the EDF by using rudder, right increase the angle and left reduces and at times when the wind is gusty, actually push hard left to get forward and down motion. The VTOL simulator was my key to understanding the principle.
Hope you try it. This is my own design.
Hi,

Where is the pivot point of the EDF in relation to the CG (forward, behind, how much).
Do you have video of it taking off?

Thanks
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Old Jun 06, 2014, 02:24 AM
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Nuteman, this is very light weight fighter project. Top flight speed is less than 55 km/h. It is more like slowflier or something. Not fast EDF fighter.

Pivot point is some after CG. One inch or less. But CG is mostly at neutral point. I have also gyro control for pitch.

By the way I have tilt control under my index finger. And it works well.

Here is one video, which I hope show what It can do and what is the idea.

MrJan's YF23 STOVL Story (2 min 19 sec)
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Last edited by MrJan; Jun 06, 2014 at 02:29 AM.
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Old Jun 06, 2014, 10:14 AM
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MrJan,

Is this jet capable of stationary hover in no wind? It looks like it is so close to being a true VTOL craft.
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Old Jun 08, 2014, 08:06 AM
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MrJan,

Is this jet capable of stationary hover in no wind? It looks like it is so close to being a true VTOL craft.
It is capable of hover if there is no wind and you can flight helicopter. Or it was. Aircraft is recycled.
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Last edited by MrJan; Jun 08, 2014 at 08:34 AM.
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Old Jun 17, 2014, 07:28 AM
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Originally Posted by MrJan View Post
Nuteman, this is very light weight fighter project. Top flight speed is less than 55 km/h. It is more like slowflier or something. Not fast EDF fighter.

Pivot point is some after CG. One inch or less. But CG is mostly at neutral point. I have also gyro control for pitch.
Hi,

You might like what I've done here: http://www.rcgroups.com/forums/showthread.php?t=2187372

No gyro on that plane , but it does have a "two position" thrust angle for vectored thrust assisted take-off.
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Old Jun 19, 2014, 04:44 AM
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Yes I like that. We have millions of different solutions. Its interesting to see what will be the future of VTOL and STOL aircrafts. The main question is how to control aircraft at low speed.
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Last edited by MrJan; Jun 19, 2014 at 10:16 AM.
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