FREEWING MiG-29 ✈️ Experimenting with Vectored Thrust - FINALLY! -
ฝัง
- เผยแพร่เมื่อ 23 ธ.ค. 2024
- Now that my Freewing MiG-29 is back in the air, it's time to ramp up my thrust vectoring tests and start to properly get acquainted with the vectored thrust nozzles upgrade!
And well, she certainly ain't no Su-35 but hell, this is getting more fun with each new flight! :D
Quick recap: right about the same time I installed the thrust vectored nozzles upgrade on my Freewing twin 80mm EDF MiG-29, my landing gear started collapsing regularly during take-offs and landings, after roughly 200 flights, including a few hard landings and some crashes.
I tried fixing it several times but it wouldn't last. On top of that, the jet started behaving badly in the air, so I never got to truly test the thrust vectoring mod because I was busy trying to keep the plane together and fixing problems. After a 2 year hiatus (more or less) I finally managed to pull some more lasting repairs where I removed the toe out on the main landing gear wheels and so far, looks like that has made all the difference!
As for the flight problems, I now attribute it mostly to dying lightweight batteries, struggling to deliver the power demanded by the EDFs. In that sense I've temporarily given up on my light packs for this jet and I am flying it now exclusively on 5Ah packs, so the issues with asymmetric thrust and EDFs shutting down mid flight seem to be gone now.
These were Anežka's flights 225th to 227th.
MiG-29 pilot: RC4ever
Ground video: Luis Ibáñez
Airfield: Club Aeromodelisme Els Cards
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Regarding my MiG-29 setup:
QUICK LIST OF MODS
CG 15mm behind factory marks on the wings.
Reflex trailing edge by 3mm flaps, 5mm ailerons (aprox).
Reinforced stab assemblies to torsion (Epoxy - thick glass fiber laminate).
Reinforced stabs to prevent deformation (WBPU - thin glass fiber laminate, 18g/m2).
Replaced stab servos by Corona DS-238MG.
Replaced stab linkages by 4-40 threaded rod with heavy duty Du-Bro ball links.
Removed stock BEC.
Installed separate 20A UBEC that runs from a standalone receiver battery (2S 610mAh).
Installed ferrite chokes on ESC-Rx leads (next to ESC) and on the stab servo leads (next to servo).
I am using the old FrSky Redundancy Bus for everything except landing gear, lights, and everything that goes through the ribbon cables (ailerons, flaps, gear doors), as these need to go through the BB.
Shortened some of the wires, as I installed the RBus in the aft battery compartment.
Removed the toe out on the main landing gear struts by filing the chamfer on the axle pin that connects strut with retract.
I was concerned about the structural integrity of the stabs, and stab assembly so I did reinforce them with glass fiber cloth, which is part of the reason why it took me so long to get the jet ready. I'm not a fan of working with composite materials so I procrastinated a bit, lol. After my reinforcement mods, the stabs seem to be much more solid now. 💕
I took many of the 'well-known' ideas and good practices about this model recommended by other pilot-owners on forums such as RCGroups and HobbySquawk including adding reflex to the flaps and ailerons to maximize top speed and reduce trim drag (unloading the stabs in the process quite a bit) and I replaced the taileron servos by tougher ones, and the taileron linkages by 4-40 pushrods, and FWIW, also installed ferrite chokes on the ESCs leads to the rx as well as the taileron servo leads (to mention a few of the changes).
I also made my own 'quite personal' installation of the electronics and basically rewired the whole thing, changed the placement of the components, added a 20A UBEC, redundancy bus, 2x X8R receivers, the list goes on.
GEAR DESCRIPTION
Airplane: Freewing MiG-29 dual 80mm EDF + Vectored Nozzles Upgrade Set
Motors: 2x Freewing 3658-1920kV brushless inrunners
EDFs: 2x Freewing 80mm (9 blades)
ESCs: 2x Freewing 100A
Servos: Freewing 17g
Taileron servos: Replaced by Corona DS-238MG
Receivers: 2x FrSky X8R working in D16 mode, one with telemetry
Redundancy bus: FrSky RB16
UBEC: YEP 20A
Rx Battery: Rhino 2S 610mAh
Main Batteries:
CNHL G+ 6S 5000mAh 70C
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Alejandro, this is incredible. You made it look so light and easy 👏🏻👏🏻
Thank you Nir!
It should get even better once I install a gyro in her! :D
@@RC4ever yea absolutely! I’ve started using gyro recently and it makes a whole difference 💪🏻
@@nirlachman007 Imagine all the people hating on gyros what they are missing... !
Makes me feel so sad. 😢
I love watching your flights! You have amazing talent and awesome tricks that come out flawless ✨️ ❤️ ✨️ 👏
Thank you Jason!
I try to keep improving and getting smoother while also innovating with my style... I'm happy to see it's appreciated, thanks for the feedback! :D
Oh yeaaaaaah the aerobatics master is in da plaaaaace 🥳🥳🥳🥳🥳🥰🥰🥰
:DDDDDDDDDDD
Thanks Arthur!!
I really need to start installing some gyros on this one to make the most out of it, now that I'm getting serious about post-stall ^^
@@RC4ever oh yeaaaah for sure 😇😇😇
Great flight. Are you 100% rates?
Thanks! And yes... but nope!
Control surfaces are maxed out but I'm using non stock servos on the horizontal stabs with innermost servo arm hole being used, so max throws there doesn't actually yield actual 'possible' max throws. I have two new, better servos on their way and those will allow me to expand the taileron throws beyond what I have now :)
Very well done, can we have your Vectored Nozzles setup rates? Appreciated.
Thanks! I just use full rates (what the stock setup allows), and the same expo that I use for the rest of the jet, which I should check but will likely be around 60-70%
@@RC4ever Thank you. Greetings from Oz.