Freewing 90mm F-22 Raptor - Official Thread

[Evan D]

Almost sounds like a difference of a hole on the servo or horn. Are you setting it up as -100 0 +100 in your radio?

[ElCid]

Just got my F22 today. Its a very well built aircraft. Unfortunatley the flap servos appear to be a few degrees off and no matter how i adjust the servo horn etc there is no way to get them to have the same throw beyond the neutral possiton.

have a support ticket in with Motion and i am sure they will address it but has anyone else had a similar issue? If i hadnt checked both flaps at mid and full i would have corkscrewed my bird durring what was going to be my maden flight tomorrow. At mid flaps they were off by 7 mm and at full over 10 mm.

[Airguardian]

Glad to help!
Yeah, the lack of servo direction reversing of the A3S3 is a disgrace. Good thing they fixed that on the A3S4 at least.
I had to physically reverse the direction of one of my servos to be able to use the A3S3.

A3S4 only has one rudder input?
It just beats me how the people in charge of developing these gyros keep making these stupid mistakes... how hard can it be to allow a bit more of versatility in the programming features? Aaaah... <despair intensifies>


Time for some more Raptor greatness! :p

[miroku]

Thanks! :D

I haven't documented them yet, but the most important part here are probably gyro settings more than Tx settings, since the taileron mixing and stabilization is dictated by the gyro when it is on. Also, since you are at it, better get an A3S4 instead of the A3S3. The newer version should allow you to keep separated stabilized rudders so you have freedom to program scale rudder-brakes and pitch assist without losing yaw stabilization. Haven't tested it myself but looks like it should work from the specs. They've probably improved on a number of other things compared to the A3S3, so it's probably a better choice at this point. I may order one soon to test it out.

Thank you, Air Guardian！
I tried mixing the transmitter while watching your video.
When I tried to set the taileron using AS3, I realized that I needed to invert the stabilizer servo.
I also had an AS4, so it was very convenient because I could invert the servo programmatically by replacing it.
I tried to output aileron and taileron as a gyro, but it seems impossible.
Also, as you said, I tried mixing the ludder and the elevator, but since the AS4 has only one input for ludder gyro, it seems that air braking using the ludder gyro cannot be realized.
However, I think AS4 Servo Reverse is very convenient and valuable.

The ludder in the video is not gyro enabled.

[Airguardian]

Thanks! :D

I haven't documented them yet, but the most important part here are probably gyro settings more than Tx settings, since the taileron mixing and stabilization is dictated by the gyro when it is on. Also, since you are at it, better get an A3S4 instead of the A3S3. The newer version should allow you to keep separated stabilized rudders so you have freedom to program scale rudder-brakes and pitch assist without losing yaw stabilization. Haven't tested it myself but looks like it should work from the specs. They've probably improved on a number of other things compared to the A3S3, so it's probably a better choice at this point. I may order one soon to test it out.

New video ready!!!

Really exciting flights, flying to music in synch!
I need to do that more often!

[miroku]

Slow-mo version of my latest video:
(to better appreciate stick movements)

I always enjoy watching your youtube. I will change my F22 to tailerons using AS3 like you. Can you tell me your opnen tx settings?

[Airguardian]

Slow-mo version of my latest video:
(to better appreciate stick movements)

[Airguardian]

Another split screen video showing what I'm doing with my hands on the Tx while flying ^^

You can find a link to the slow motion version in the video description (although it is not published yet, but you should be able to access and watch it already if interested). ;)

1 pilot HUD light

HUD light for the win!
I did that to mine too!

[Big12fan]

It was 3D printed from a file that was shared on the F-22 3D printed parts thread. I had extra lights lying around from crashed planes and used those.

yeah ok, I mod mine last year to but yours looks better than mine. lol

[crxmanpat]

Does the F-22 come with 2 nose lights now or did you mod it?

It was 3D printed from a file that was shared on the F-22 3D printed parts thread. I had extra lights lying around from crashed planes and used those.

[Big12fan]

Here you go.

Does the F-22 come with 2 nose lights now or did you mod it?

[becevit]

Here is my F22 lit up like a Christmas tree! I counted and there are 11 different lights on it so I can see it in the air. 6 Stemwings formation lights, 1 pilot HUD light, 1 high intensity drone light and 3 red, green, white lights and it’s still hard to see. I know it’s scale and I really tried to make it work with lights so I wouldn’t have to paint it but it looks like painting or putting and FpV camera are the only other solutions I have.


Any paint scheme recommendations ?

[HangarQueen]

I've flow different EDF models on our grass runway, and the only problem I've had so far is the takeoff distance of some (the SU35 and the L39). Shifting the CoG back somehow helped, but on the SU35 I've upgraded the EDFs to FMS units (still waiting for remaiden). Landing was never a problem.
I have the 64mm version of the F22, and I know how much of a floater it is on landing, so I know what to look out for. But with full flaps it seems that it can be landed on a relatively short distance.
The extra thrust is what I chose the 8S version for, to make sure I have enough room for takeoff. From what I've seen in videos, that shouldn't be a problem. Our runway is about 100m (300ft) long, but there is a deep ditch on both ends, which makes that overshooting isn't an option at all, unless you have spare retracts available. (ask me how I know)

[xviper]

I’ve only flown this plane off GeoTex and all landings have been quite smooth. This is not likely going to be a grass plane for me.
I just finished a Flex Innovations F-100 and put an 8s fan with a Hobbywing 120HV, V5, with reverse into it. Haven’t flown it yet due to weather. This ESC is virtually identical to the FMS Predator 120HV with reverse.

[HangarQueen]

Doesn't your 8S "combo" come with an ESC? Why not just do the testing with that? It even has a built-in BEC, no?

No, sorry, by combo I meant EDF unit plus motor. The guy who sold it to me had to remove the original ESC because it malfunctioned, and he put in a Kontronik, which he wants to keep. And the original ESC had an external uBEC I believe, which I don't particularly trust either (I prefer sBEC).
Meanwhile I've been reading more into this and the rcg thread, and found someone writing about current around 100A for the standard 8S setup. That reassures me that a 120A ESC will be able to cope. Combined with two 20A sBECs, I should be safe. I found a Hobbywing Platinum HV 120A for a very good price too, so I can start testing as soon as everything arrives.
I downloaded all STL files for the 3D-print parts, and I think I'll start with the nose gear brace, as we have a grass runway. Maybe also the nose gear support back plate too (the rectangular part that goes under the cockpit).
I also read about cutting one ring off the springs all around, to prevent the pogo dance on landing? Maybe maiden first, to see whether it is a problem on our runway or not.

[xviper]

I think I'll just leave the standard Freewing 8S EDF combo in and test it with a 120A ESC

Doesn't your 8S "combo" come with an ESC? Why not just do the testing with that? It even has a built-in BEC, no?

[HangarQueen]

I think I'll just leave the standard Freewing 8S EDF combo in and test it with a 120A ESC and my current 4S 5000 batteries (Turnigy Nano) to get an idea of what I'm up against.
I just ordered a new SR10 Pro receiver, which will offer me exactly what I need for this model. It has dual power supply input, which will allow me to add two 20A SBECs that I have available, one on the first 4S flight battery (the one that supplies the true "ground" of the 8S voltage) and one on a separate 3S receiver battery.
I started using gyros on some of my faster models, because my eyesight has been degrading in the last couple of years, and I get more and more trouble with judging orientation. The auto-level (I call it the "panic" function) mode of this receiver allows me to return the model to straight and level by the push of a button. I don't think this model needs any more stabilization than that, but it might come in handy in more turbulent weather.
And the 10 channels won't be overkill when I bypass the Blue Box and start using separate channels for everything, plus a channel for the gear doors too when I implement my own sequencer.
And the thing that I like most about this latest generation of stabilized receivers, is that you can set it up from your radio, through LUA scripts. No more connecting to a PC to change a setting. Setup and fine tuning at the field is a lot more efficient now.

[xviper]

Thanks, xviper.
Maybe I'll just pull out the Yep 120A HV from my 90mm Yak 130 and do an engine run-up on the F22 with that one to see how many amps it actually pulls. If it pulls around 110A at WOT, I could live with it on a 120 ESC.
Did you have to remove foam to fit the FMS unit?

No, it fit right in there.

[HangarQueen]

Thanks, xviper.
Maybe I'll just pull out the Yep 120A HV from my 90mm Yak 130 and do an engine run-up on the F22 with that one to see how many amps it actually pulls. If it pulls around 110A at WOT, I could live with it on a 120 ESC.
Did you have to remove foam to fit the FMS unit?

[xviper]

I have just bought the 8S second hand, but without the ESC. The guy replaced the original ESC, which he said never really worked well, with an expensive Kontronik one, which he wants to keep.
The model is almost like new, and we agreed on a very nice price.
Awaiting the arrival of the model (he's shipping it to me), I'm looking for an ESC. I have an 120A HV Yep is another model that I could use, but I haven't found any figures yet on current draw of the 8S combo. The standard ESC is 150A, so I'm wondering if I should get a 150A one too. I doubt if this combo draws more than 120A, but does anyone have some real world numbers on this?

I can't give you any "real world" numbers on this EDF, only what's published on RC Castle. I'm using this combo in mine:
https://www.rc-castle.com/index.php?...roduct_id=8698
It's using the FMS Predator 120A HV ESC with reverse. Although it's rated at 120A, it can sustain up to 150A for about 10 seconds. The fan draws 108A. The reverse feature is really nice to have on jets.
I've also been using this system in my 8S 90mm Yak 130 for over a year and this system is about to go into my Freewing F-18 Blue Angels jet.