Freewing MiG-29 with Promodeler Servos !! ✈️ Testing the DS150CLHV
25On this video I demo the Promodeler DS150CLHV servos on the Freewing MiG-29 RC jet, these are some serious servos!! The torque and reliability of the stock stab servos are a known achilles heel of this otherwise fantastic model, and for a long time I've got away with murder with a couple of Corona's DS-238MGs as replacements, but it was high time I upgraded to something proper for the bird size. And no, this video isn't sponsored, I paid for the servos myself, thanks! ;)
Promodeler as a brand seems to go to great lengths to care about product design, function and reliability, which is what attracted me to them in the first place and to finally make the decision to pull the trigger. I also appreciate the wealth of knowledge that Jon made available at the ProModeler site! :D
I haven't yet put enough flights into them for me to say that they are the best thing around since the advent of molten cheese, but from all the information I have been able to gather, I am pretty confident these are some of the best servos you can get in this weight and size class (if not the very best), particularly at this price point.
So far, I haven't yet made the proper modifications on the aircraft to run these servos at high voltage, which is kind of a waste of their potential and I'm sure John Beech from ProModeler would rightfully scorn me for it, but it will be done in time. And for the time being, the very change of servos already allowed me to feel the jet being a lot more locked-in and I also managed to increase the throws without fear of putting too much load on the servos. Maybe it's harder for you to tell from the video, but I did notice indeed. The extra throws are super important for me, since they are paramount to my style of extreme post-stall flight. ❤️
These were Anežka's flights 256th to 258th.
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 first by Corona DS-238MG, and then ProModeler DS150CLHV.
- 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 ProModeler DS150CLHV (Corona DS-238MG before that).
Receivers: 2x FrSky X8R working in D16 mode, one with telemetry
Redundancy bus: FrSky RB16
UBEC: YEP 20A
Rx Battery: Nanotech 2S 1000mAh
Main Batteries:
- CNHL G+ 6S 5000mAh 70C
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