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Official Freewing 80mm MiG-21 Fishbed Thread
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Some details on the Mig... I'm using Roaring Top 4400 6s batteries with the flight timer set to 3:30...battery is at 15% after landing. I tried bigger/heavier batteries but the performance suffers with the extra weight. The plane handles our rough grass strip pretty well. I lengthened the nosegear by about 6mm and added a 3d printed brace to keep the nosegear from bending...so far, so good. This was an ARF+ kit and I'm using a 1920kv fan from my crashed Mig-29 (same as the one in the Gripen) which seems to work well. The afterburner is the one that Kallend shows on his RCG blog (auto LED tail lightbulb and a small 10amp car ESC). The plane is very "honest"...no hidden tricks that bite you in the butt suddenly. Stalls are very benign...if you force the plane into a max AoA attitude it will descend wings level in "falling leaf" mode until you release the elevator; the nose drops and you're flying again.
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Originally posted by SanExup View PostSo what's it like with 8s?
It's not really much faster on 8S than 6S, 10 mph with the setup I have and it's quite a bit heavier in my case, which spoils some of what it's good at, which is flying slow.
I do think I'd miss the extra 8S thrust though.
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Well, damn....another unexplainable crash! I flew my Mig again today....3 successful flights and one disaster. On the fourth flight the plane took off normally...takeoff flaps set, gear down, etc. When the plane rotated I retracted the gear and flaps and climbed straight ahead to about 50 feet and started a right turn. The plane banked to the right as expected, but when I commanded left aileron to come out of the turn the plane didn't respond. It continued to roll right slowly and nosed down to an impact in a gravel parking lot. Fuselage totaled, wings wrinkled but still salvagable, tail surface OK. Roaring Top 4400 battery destroyed too.
Of course, all the electronics work just fine after the crash. This is the kind of thing I just hate and I've had a couple of these type crashes lately....the plane just stops responding and flies into the ground. This Mig had about 30 flights on it with no trouble of any sort.
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Originally posted by pullupnow View Post
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Originally posted by radfordc View PostWell, damn....another unexplainable crash! I flew my Mig again today....3 successful flights and one disaster. On the fourth flight the plane took off normally...takeoff flaps set, gear down, etc. When the plane rotated I retracted the gear and flaps and climbed straight ahead to about 50 feet and started a right turn. The plane banked to the right as expected, but when I commanded left aileron to come out of the turn the plane didn't respond. It continued to roll right slowly and nosed down to an impact in a gravel parking lot. Fuselage totaled, wings wrinkled but still salvagable, tail surface OK. Roaring Top 4400 battery destroyed too.
Of course, all the electronics work just fine after the crash. This is the kind of thing I just hate and I've had a couple of these type crashes lately....the plane just stops responding and flies into the ground. This Mig had about 30 flights on it with no trouble of any sort.
I had two flights on mine yesterday to start our flying season and I forgot that it can be difficult to see at distance lol.
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