Official Freewing MiG-29 Fulcrum Twin 80mm Thread

[heisteff]

ok for the airbrakes, it´s a little bit like on t33jetmans pictures. i use one 3.5 kg servo instead and a ballink leverage, printed out some servoarms ( bent forward somemore then normal). the "brakepedals" where shaped / cut out inside to fit the parachutetube (3d of thingivers) and after the hinges where done i glassed them with a 23gr fiberglas. the bottompiece (about 15 cm) that was cut out screws back on so you can access it for maintenance and for my elevators i attached some pics too. the white stick shows just about the correct lenght of the axle. hope it helps

greetings stefan

[xviper]

@heisteff Can you tell us and show us what you did to get the airbrakes to work?

[heisteff]

yes thats what i did, i dont know if it really takes any load of the stab, since the axle is at about 25% MAC and there is quiet some more wingarea in the "wind" then at the stocksetup (axle in the middle). so i thought more powerfull servos wont hurt, just by my feeling. most importend improvement by that mod is the stiffnes of the tail i think

[kallend]

Thanks happy you like it,

to Kai; the elevons are comlettly rebuild to scale mechanics so the axel is going halfway into the fuse

I'm not quite sure what you mean by that. Did you change the angle of the taileron rotation axle to be swept back, like the real thing?

If so, that should relieve the load on the stab. servos. (See, for example, posts 2712 and 2842 in this thread).

I believe Airguardian reached the same conclusion.

[heisteff]

Thanks happy you like it,

to Kai; the elevons are comlettly rebuild to scale mechanics so the axel is going halfway into the fuse, there are operated by HS 645 MG -Servos, power is supplied by the BEC of the Controllers. but i might give it a external bec since i need a little bit of weight in the nose (due to one 16000 flight battery)

Stefan

[sunbeam]

Brilliant work! It looks excellent! 👍 I just start to setup/rebuild mine, but I think I will not achieve your looks 😄
Did you change the servos? What about your power supply? I will use a Powebox Pioneer together with two 12A BEC from two ESCs from YGE.

Greetings, Kai

[Hugh Wiedman]

heisteff INCREDIBLE WORK, love the air brake, cockpit, rivet detail and of course the operable canopy. First Rate!!!

[DCORSAIR]

Hi folks

roughly one year of work, here is my version of the mig

greetings stefan

Looks awesome...

[heisteff]

Hi folks

roughly one year of work, here is my version of the mig

greetings stefan

[Evan D]

Why post in this thread?

Any 6 channel or more DSMX receiver. I like to separate steering from rudder so that’s 7ch. If you want an internal gyro like AS3X that changes what you need. I use Orange receivers and satellites. I don’t use gyros.

Really if you need to ask there’s a issue.

[sadams714441]

Just ordered the F4. What receiver is a good choice. Using NX 8

[sunbeam]

I opened the gear and lubricated everything - the whole mechanic moved fine without resistance. But even in that open condition the gear suddenly stoped moving without any reason. There are microswitches for the endpoints inside the gear. So I guess there is an electronical problem which sends a "false stop-signal".
I will keep it for spareparts and wait for the new one. Hope the screws still hold tight.

[sunbeam]

Yes, I know what you mean 👍 I will see how I like flying and then think if I buy a Set of 4000er or 4500er

[Airguardian]

I mean, the plane will fly with those, you can definitely use them, my comment was maybe too harsh. But I strongly believe you'll have a better experience with this plane running a lighter setup. From two 850g packs to two 600g ones you have half kg of extra thrust margin. And lower wing loading is also very welcome :)

[sunbeam]

Airguardian : Yes, you are right

The 6S 7000er are from my AF-Models L-39 (12S) and shall also be flown in my yet to build Skymaster A-10 (2x 12S). I did not want to buy new packs

[kallend]

Hi guys

in the last weeks I nearly read all the posts in this thread...although I did not reach the end yet, I got a lot of usefull informations until now. In the next days I will start to build/mod my MiG29. There will be:

# HV setup for elevator, rudder, aileron and flaps (MKS HV69 for elevator, Spektrum A4030 for the rest - thanks to Henrik)
# therefore new cable-connections between fuselage and wings with cable and connectors from PowerboxSystems
# servo-rudder connection for elevator and others with y-servohorns from Gabriel Stahlformenbau with 3mm pushrod covered by a carbon tube
# strengthened rear with carbon plates and inserted carbon tubes
# PowerboxSystems Pioneer with iGyro, GPS III and 2x Jeti REX3
# 2x YGE Saphire 125A ESCs with 12A BEC
# BlueBox only for gear, geardoors and LEDs in the wings (I will use the stock BEC to get the 8,2V down to 5,0V in the connection from the Pioneer to the BlueBox)
# still thinking about other lights like beacons, strobes, light in the top of a rudder, second landing light etc, but I have not found the right ones yet; maybe something from unilight.at...unfortunately innoflyer does not exist anymore
# centerburner from RC Geek (I will get 7V from one of the flight lipos by a Jeti BEC for the centerburner and the other lights to be installed)
# Lipos will be 2x 7000mAh from SLS (~850g) with AS150 7mm connectors

...I will have to get all this togehter in the next weeks/months... ;-)

But now I have got one question: I have problems with my left main gear. Every second time or so it will not go out or in and gets stuck after a few centimeters. I cannot see if there is some resitance in moving so that the elecronics will stop it. Does anybody had the same problem? I already ordered a new one from Motion....

Again, thanks for all the posts and ideas created here, very nice to read and thanks to everybody giving input to it! I realy enjoy reading and will finish to read the last threads... :-)

Kai

My Do-it-Yourself afterburners are not only inexpensive but also less obstructive of the airflow an run directly from the LiPo.

[Airguardian]

# Lipos will be 2x 7000mAh from SLS (~850g) with AS150 7mm connectors

Why... just why??

You are going to cripple your jet's performance with those packs. Go light instead!
The thing will fly MUCH better, landing gear will suffer much less. Flight time won't be that different. The extra battery power is usually burnt by the additional thrust required to keep the plane in the air. Between 5Ah and 4Ah packs the 4Ah made the experience much better, and flight times were around the same. Going to 7Ah packs sounds like a really bad choice on this one. Although, weight wise, 850g are doable. I've flown the jet with 870g Panther packs back in the day, so it can take it, but no, I would not recommend it.

[sunbeam]

Hi Evan

Yes thanks, I will get it out the next days and see if something is not moving well. It emediately stops after trying to gear up as if there is some mechanical resistance or that the housing is too stiff or sluggish.
All I hope is that the screws in the plastic will still hold tight when setting it back in....

[Evan D]

Pull it out and test it. If it still does it lube the jack shaft with grease (every one should do this on all retracts) and if that doesn’t fix it loosen the screws holding the retract halves together just a little.

[sunbeam]

Hi guys

in the last weeks I nearly read all the posts in this thread...although I did not reach the end yet, I got a lot of usefull informations until now. In the next days I will start to build/mod my MiG29. There will be:

# HV setup for elevator, rudder, aileron and flaps (MKS HV69 for elevator, Spektrum A4030 for the rest - thanks to Henrik)
# therefore new cable-connections between fuselage and wings with cable and connectors from PowerboxSystems
# servo-rudder connection for elevator and others with y-servohorns from Gabriel Stahlformenbau with 3mm pushrod covered by a carbon tube
# strengthened rear with carbon plates and inserted carbon tubes
# PowerboxSystems Pioneer with iGyro, GPS III and 2x Jeti REX3
# 2x YGE Saphire 125A ESCs with 12A BEC
# BlueBox only for gear, geardoors and LEDs in the wings (I will use the stock BEC to get the 8,2V down to 5,0V in the connection from the Pioneer to the BlueBox)
# still thinking about other lights like beacons, strobes, light in the top of a rudder, second landing light etc, but I have not found the right ones yet; maybe something from unilight.at...unfortunately innoflyer does not exist anymore
# centerburner from RC Geek (I will get 7V from one of the flight lipos by a Jeti BEC for the centerburner and the other lights to be installed)
# Lipos will be 2x 7000mAh from SLS (~850g) with AS150 7mm connectors

...I will have to get all this togehter in the next weeks/months... ;-)

But now I have got one question: I have problems with my left main gear. Every second time or so it will not go out or in and gets stuck after a few centimeters. I cannot see if there is some resitance in moving so that the elecronics will stop it. Does anybody had the same problem? I already ordered a new one from Motion....

Again, thanks for all the posts and ideas created here, very nice to read and thanks to everybody giving input to it! I realy enjoy reading and will finish to read the last threads... :-)

Kai