Official Freewing MiG-29 Fulcrum Twin 80mm Thread

[kallend]

ultimately, probably just bad piloting, but same thing happened on maiden flight #2 - i think i was too slow on my final turn on approach and she lost lift, at that point as3x took over trying to correct and i was doing the same thing on the ground with my radio and it just resulted in disaster #1... and now #2, which is basically what the fuselage was after last Sunday so i stripped her down and now i wait for spare parts... :)

No gyro, AS3X or SAFE will rescue you if you stall out on the turn from base to final. I expect the RX is fine, they are amazingly robust, but give it a good check out.

[jasmith41]

What were the original issues?

ultimately, probably just bad piloting, but same thing happened on maiden flight #2 - i think i was too slow on my final turn on approach and she lost lift, at that point as3x took over trying to correct and i was doing the same thing on the ground with my radio and it just resulted in disaster #1... and now #2, which is basically what the fuselage was after last Sunday so i stripped her down and now i wait for spare parts... :)

[kallend]

For the MiG, I'm more concerned about stabs and rudders, this time around. The jet does some weird things I'm not totally fond of that would be better dealt with using stabilization on conventional controls.

For example, the jet has a tendency to wing rock with turbulence a bit more than I find visually-aesthetically pleasing, and a more pressing concern, the jet has a bit of a tendency to suddenly drift and deviate when pulling a bit too hard on the pitch stick. I do compensate it with rudder but my reflexes can't possibly be fast enough to make it look cool.
Finally, the plane has a tendency to want to drop the nose after coming out from a roll, which is annoying and when using an aft shifted CG (beyond 15mm), landing becomes quite a bit tricky. A gyro on the stabs and rudders would help with all that much more than on the nozzles. The gyro on the nozzles would be great on the other hand to reduce high alpha wobble and enhance post stall controllability overall. :)

Well, the high alpha wobble was apparent in the video, which is why I made the comment. Not as good (yet) as the SU-35 at high alpha.

[Airguardian]

For the MiG, I'm more concerned about stabs and rudders, this time around. The jet does some weird things I'm not totally fond of that would be better dealt with using stabilization on conventional controls.

For example, the jet has a tendency to wing rock with turbulence a bit more than I find visually-aesthetically pleasing, and a more pressing concern, the jet has a bit of a tendency to suddenly drift and deviate when pulling a bit too hard on the pitch stick. I do compensate it with rudder but my reflexes can't possibly be fast enough to make it look cool.
Finally, the plane has a tendency to want to drop the nose after coming out from a roll, which is annoying and when using an aft shifted CG (beyond 15mm), landing becomes quite a bit tricky. A gyro on the stabs and rudders would help with all that much more than on the nozzles. The gyro on the nozzles would be great on the other hand to reduce high alpha wobble and enhance post stall controllability overall. :)

[kallend]

Second flight session with the VT MiG. Better this time with more aft CG again and a couple of rails added back in but still have to set it up better and I'm feeling like the jet could really do with a gyro... :p

At least on the VT nozzles.

[GliderGuy]

Second flight session with the VT MiG. Better this time with more aft CG again and a couple of rails added back in but still have to set it up better and I'm feeling like the jet could really do with a gyro... :p

Impressive multiple alpha lock recoveries starting at 2:30 and beyond. Now that’s COOL!

-GG

[kallend]

I'm not putting the OEM Rx back in her though - just to make sure that wasn't part of her original issues. 🤣🤣🤣

What were the original issues?

[Airguardian]

Second flight session with the VT MiG. Better this time with more aft CG again and a couple of rails added back in but still have to set it up better and I'm feeling like the jet could really do with a gyro... :p

[skybolt]

If you want to understand the WHY, read this thread:

https://www.rcgroups.com/forums/show...ns-workarounds

Very interesting reading. The caps on the Mig ESC are fully enclosed I have put them on top of the ESC to get some cooling they do not interfere with the airflow and fit nicely against the foam lip above the ESC.

[jasmith41]

not really related, but does anyone with an ix20 know what the 'SD' in the upper left corner of the screen by the model name is and why it would be running...? Mine all of a sudden started eating battery the other day after having a hard time starting and then i noticed this 'SD' thing is running and can't figure out what it is or how to turn it off...

Please advise if you know something about it and thanks in advance...

j.

[kallend]

Is it ok to shorten the battery leads coming from the ESC on this jet?

If you want to understand the WHY, read this thread:

https://www.rcgroups.com/forums/showthread.php?952523-too-long-battery-wires-will-kill-ESC-over-time-precautions-solutions-workarounds

[Robert Belluomini]

Is it ok to shorten the battery leads coming from the ESC on this jet?

Absolutely! It is always best to keep the battery to ESC wire length as short as possible.

[skybolt]

Is it ok to shorten the battery leads coming from the ESC on this jet?

[jasmith41]

Piled my beloved EFL Viper 90mm in last weekend. Gathered up all of the popcorn (she fit in the car better...), went home and stripped it down, and then got online and order a new fuselage, port side main wing, and nose cone, and now i patiently wait for the back-ordered parts. I can rebuild her, make her gooder than she was (theme from the Six Million Dollar Man playing in the background...)...

I'm not putting the OEM Rx back in her though - just to make sure that wasn't part of her original issues. I'll put in a new 637T and program it myself. I may not know much at this point, but i know how to do that and if there were any weird things going on in the OEM 637TA, that will eliminate that.

Anyone want to buy a slightly used 637TA...? 🤣🤣🤣

[kallend]

About as long as me! My first RC unit was a Citizenship single channel super regenerative rubber band escapement system. To call it a "control system" would be generous.

My first TX had two vacuum tubes and used a war surplus XTAL. The tubes were 3V4 pentodes IIRC.

[radfordc]

Welcome to a life-long “habit”. ....Been doing it for 60 years as have other posters. Proof positive!

-GG

About as long as me! My first RC unit was a Citizenship single channel super regenerative rubber band escapement system. To call it a "control system" would be generous.

[GliderGuy]

Thanks brother - you don't know how much i appreciate you... you're knowledge and wisdom has been invaluable to me on this journey and i'm having a ball because of you and the rest of the stand-up guys on here.

Refreshing to see your enthusiasm!

Be mentally ready for when a crash happens. If you pick up ALL the pieces, you can generally repair these birds. I’ve gotten some basket cases back in the air.

So allow yourself some time to be upset, but then get back on the RC horse. It’s too much fun of a hobby to walk away from. A wise RC pilot once told me, “Do not start this hobby if crashing will make you mad. You WILL crash!”

LOL - You are already in it, so you don’t have any option but to suck it up and keep going when it happens.

Welcome to a life-long “habit”. It sure beats sitting on a couch watching TV. Good anti-Alzheimer’s brain stimulation, too. Been doing it for 60 years as have other posters. Proof positive!

-GG

[jasmith41]

Hey, don't worry I'll show you mine at the field soon and we'll get you off on the right foot. There are definitely a few important things that you have to look at (4500 posts here, there was a lot of discussion) because we did have problems with this plane at first. Every plane has a few things you need to be made aware of. The A10's pogo-stick landing because it was nose heavy. The Phantom's elevator servo. Since I did the modifications on the Mig29 I've have had no problems at all, not one. Its not hard to fly and handles very well.

Thanks brother - you don't know how much i appreciate you... you're knowledge and wisdom has been invaluable to me on this journey and i'm having a ball because of you and the rest of the stand-up guys on here.

[themudduck]

thanks for scaring the **** out of me now - it's hard enough to fly these confidently when i only started a year ago...🤣🤣🤣

Hey, don't worry I'll show you mine at the field soon and we'll get you off on the right foot. There are definitely a few important things that you have to look at (4500 posts here, there was a lot of discussion) because we did have problems with this plane at first. Every plane has a few things you need to be made aware of. The A10's pogo-stick landing because it was nose heavy. The Phantom's elevator servo. Since I did the modifications on the Mig29 I've have had no problems at all, not one. Its not hard to fly and handles very well.

[Airguardian]

Well, I wouldn't quite describe it as an alpha locked if you are not locked into it...


Most of these fighter-jet airframes will have a tendency to pitch up as they get into high or extreme AoAs depending on CG setting.
The MiG just made it worse with a bad thrustline. A better thrustline and the capability to vector makes away with that. One shouldn't be afraid to enter that condition, one should just practice to learn how to get out safely ;)

With TV, it is easy. Without TV, it's almost mission impossible on this one.

And I agree with GG, TV is the way to go on this one IMO. (Or at least install nozzles with better thrustline after kallend sorts them out).