Originally posted by GliderGuy
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Official Freewing MiG-29 Fulcrum Twin 80mm Thread
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Originally posted by kallend View Post
At what temperature are you making these measurements? IR is very sensitive to temperature.Hugh "Wildman" Wiedman
Hangar: FL/FW: Mig 29 "Cobra", A-10 Arctic, F18 Canadian & Tiger Meet, F16 Wild Weasel, F4 Phantom & Blue Angel, 1600 Corsair & Spitfire, Olive B-24, Stinger 90, Red Avanti. Extreme Flight-FW-190 Red Tulip, Slick 60, 60" Extra 300 V2, 62" MXS Heavy Metal, MXS Green, & Demonstrator. FMS-1700mm P-51, Red Bull Corsair. E-Flite-70mm twin SU-30, Beast Bi-Plane 60", P2 Bi-Plane, P-51.
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Originally posted by GliderGuy View Post
The UP600 looks like a beast! Do they hold up well in the heat/hot weather?
-GG
Still, this is one of the hottest, driest climates on earth, they haven't skipped a beat.
They measure IR but honestly at single digit values the quality of the balance lead will impact the readouts.
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Some more data on my end regarding IR:
I read IR on my packs when charging them at 1C with the Revo Powerlab.
IR reading depends on temperature (and mAh size, etc, etc)... summer and winter readings are not the same but, without getting too technical, suffice to say that my 5Ah Panther batteries started at 1-2 mOhms/cell and they are now at 1.5-3 mOhms cell after 100 cycles each. Out of 6 Panther Li-Pos, only 2 got a bad cell which showed up after 100 cycles and a lot of abuse (measuring 5-6 mOhms on the bad cells). Still, with my intensive use, the batts don't seem to pack as much of a punch as they did being new, but after 100 flights I'd still call that a win, considering the abuse I've put them through...
4Ah and 5Ah Nanotech batts that I use are also in the 2-4 mOhm/cell range.
Edit: The temperature where I charge my batts will be about 10-15ºC in winter and 20-25ºC in spring/summer/autumn.
Some hot days, it may get up to 30º. ATM, I'm charging at about 20-25ºC.
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Originally posted by mshagg View Post
Haha sorry I mistyped, it's the UP6+ not the 600! Dual 300W instead of dual 600W.
Still, this is one of the hottest, driest climates on earth, they haven't skipped a beat.
They measure IR but honestly at single digit values the quality of the balance lead will impact the readouts.
Just because you can make videos doesn't mean you should post all the minutiae of your life online.
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Maidened my mig today. It flew really well! Only had one issue.
The airplane is stock except pro modeler 150oz torque horizontal stab servos and upgraded linkage. Admiral 10ch receiver with satellite and hobby eagle gyro (it was off). C.G. 7-8mm behind recommended. Slight reflex in flaps and ailerons. stock BEC. Flaps were up.
I lost all control in a descending left hand turn and eventually gained it back after 3-4 harrowing seconds lol. I’m leaning towards an issue with the BEC. Could those high power servos be causing an overload on the stock 8a BEC?
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Originally posted by flyAA View PostI lost all control in a descending left hand turn and eventually gained it back after 3-4 harrowing seconds lol. I’m leaning towards an issue with the BEC. Could those high power servos be causing an overload on the stock 8a BEC?
Drop in a 20A UBEC and ideally power it off a separate 2S Li-Po pack.
Also, how is your receiver setup?
Where did you place it, are you using satellites, etc?
Ideally you should have a redundant receiver system on such a plane, and at least one of the receivers/satellites should be placed in the nose with antennas oriented smartly.
Please, send pics of your receiver and antenna installation for reference.
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Originally posted by flyAA View PostMaidened my mig today. It flew really well! Only had one issue.
The airplane is stock except pro modeler 150oz torque horizontal stab servos and upgraded linkage. Admiral 10ch receiver with satellite and hobby eagle gyro (it was off). C.G. 7-8mm behind recommended. Slight reflex in flaps and ailerons. stock BEC. Flaps were up.
I lost all control in a descending left hand turn and eventually gained it back after 3-4 harrowing seconds lol. I’m leaning towards an issue with the BEC. Could those high power servos be causing an overload on the stock 8a BEC?
Hugh "Wildman" Wiedman
Hangar: FL/FW: Mig 29 "Cobra", A-10 Arctic, F18 Canadian & Tiger Meet, F16 Wild Weasel, F4 Phantom & Blue Angel, 1600 Corsair & Spitfire, Olive B-24, Stinger 90, Red Avanti. Extreme Flight-FW-190 Red Tulip, Slick 60, 60" Extra 300 V2, 62" MXS Heavy Metal, MXS Green, & Demonstrator. FMS-1700mm P-51, Red Bull Corsair. E-Flite-70mm twin SU-30, Beast Bi-Plane 60", P2 Bi-Plane, P-51.
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Originally posted by GliderGuy View PostFlyAA- Don’t fly again until you solve this!!!!!
Are you using RF Chokes as discussed in this thread?
Need data: Pix of setup, throttle setting, flaps down or up, what things were in process of moving, battery types, what ever you can supply for review.
Thanks.
-GG
-flaps up
-probably around 30% throttle
-i was in a descending left hand turn. no flaps/gear moving
-hrb 6s 5000 batteries
-my receiver is in the forward battery tray and the satellite is in the nose
Thanks for your help!
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Originally posted by flyAA View Post
-no RF chokes
-flaps up
-probably around 30% throttle
-i was in a descending left hand turn. no flaps/gear moving
-hrb 6s 5000 batteries
-my receiver is in the forward battery tray and the satellite is in the nose
Thanks for your help!
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Originally posted by Airguardian View Post
I bet.
Drop in a 20A UBEC and ideally power it off a separate 2S Li-Po pack.
Also, how is your receiver setup?
Where did you place it, are you using satellites, etc?
Ideally you should have a redundant receiver system on such a plane, and at least one of the receivers/satellites should be placed in the nose with antennas oriented smartly.
Please, send pics of your receiver and antenna installation for reference.
i ordered a 20amp castle BEC so going to get that installed soon.
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Send a photo of your radio set up in the MiG. Also….strongly consider adding RF chokes. Research the discussions here in this thread.
My gut feeling (hunch) the loss of control is not BEC related, since you stated that no systems were in transition/moving. There’s another gremlin in your system IMO!
The experts here will be able to help you sort this out. MAN….don’t fly it again until you are sure the gremlin is gone! I sense a disaster as the outcome, otherwise.
-GG
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