Originally posted by fredmdbud
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Official Freewing MiG-29 Fulcrum Twin 80mm Thread
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Originally posted by Evan D View Post4-40!is a thread size. You probably are talking a turnbuckle which is very strong.
depending on the size of a carbon rod it could be as strong.
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Maiden +1 in the books.
Filmed from the ground as well as partial onboard (unfortunately the runcam is not very fond of too much cold, so typically cuts out mid-flight as it gets cooled down).
No drama what so ever, so not too much to take away from it in terms of forensics (fortunately I guess)
But seriously... freewing needs to stop constructing their models for half the recommended battery weight.... The conservative CG recommendations (and tightly related; airframe / battery location design) is getting to the point of being both ridiculous and dangerous.
In my case, I flew with Gens Ace 5000 mah 45C, a fairly light 5000 pack, as far aft as possible in aft and mid locations without digging foam, AND added 30g lead as far back on the fuse as possible, and still it is nowhere near balancing. This translates to about 15-16 mm aft of the marks, and it still needs a fair bit more. My current guess is that the actual neutral point is somewhere around 25 mm aft from the marks, but obviously wouldn't jump right into that. But still, it is getting a bit silly that we can't fly on recommended battery packs without serious mods to get CG good.
Sure, I realize the need for a *bit* conservative CG. You don't want 1000 random pilots starting off with a truly neutral model. That would not go very well. But there is a difference between having a shave and cutting your own throat.Freewing A-10 turbine conversion: http://fb.me/FreewingA10TurbineConversion
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Of course. You want to be balanced no more nose heavy than the marks under the wings. Unless you have very light batteries you'll need to use the middle battery location. I'm very sure that many of the earlier crashes were because people didn't realize there are three battery locations and just used the front and rear ones.
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Originally posted by hmarmaizmd717 View PostJust asking, I balanced mine with batteries front and back. It was tooo nose heavy. Would you recommend moving
the front one to the middle Better balance???
hmarmaizmd717
Oops, what Evan D said.
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Originally posted by xviper View PostThe front battery tray is really NOT for a battery. I believe that's how the first 3 crashes in Taiwan happened. That and the likelihood that those guys didn't bother to read the manual and they used the first hole in the elevator servo arm with the original un-upgraded servos.
Freewing A-10 turbine conversion: http://fb.me/FreewingA10TurbineConversion
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Originally posted by hmarmaizmd717 View PostI'm using 6000 bats.
hmarmaizmd717
Set your timer to 3:30 to start with and then experiment with longer flights vs ending cell voltage that you want.
Expect you will need 4 mm of FFS trim vs the book 1 mm. If you maiden with the book 1 mm trim, you will quickly be adding more clicks of nose up trim. Maybe maiden at 3 mm to start with.
I reduce to about 30% power on down wind...full flaps and gear, then reduce to about 15% on final....and adjust power on finial as needed. She floats a lot, but so easy to land!
-GG
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Originally posted by GliderGuy View PostExpect you will need 4 mm of FFS trim vs the book 1 mm. If you maiden with the book 1 mm trim, you will quickly be adding more clicks of nose up trim. Maybe maiden at 3 mm to start with.
My current trim: (still nose heavy)
Freewing A-10 turbine conversion: http://fb.me/FreewingA10TurbineConversion
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I wonder if the reflex in your flaps changes your trim a little. 🤔 I got uncomfortably tail heavy (the tail was dropping on me and the jet felt like it would begin pitch up at anything less than half throttle) and I don’t believe I had that much down trim. Then again, I didn’t put any reflex into my flaps or ailerons. With my CG roughly 10mm back from the stock marks with the gear down I’ve got the leading edge of the elevator just about in line with bottom edge of the fuselage and it’s where I personally found it to fly comfortably and felt neutral.
Originally posted by janmb View Post1 Photo
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Originally posted by RudyD54 View PostI wonder if the reflex in your flaps changes your trim a little. 🤔 I got uncomfortably tail heavy (the tail was dropping on me and the jet felt like it would begin pitch up at anything less than half throttle) and I don’t believe I had that much down trim. Then again, I didn’t put any reflex into my flaps or ailerons. With my CG roughly 10mm back from the stock marks with the gear down I’ve got the leading edge of the elevator just about in line with bottom edge of the fuselage and it’s where I personally found it to fly comfortably and felt neutral.
I had no signs of the model wanting to sit on her butt, neither during turns or when slowing down. That would have been a good sign imo - a neutral or close to it model typically does.
I don't consider it a fault or drawback if a model hangs it's tail if you bank and yank though. A balanced model *should* do exactly that if you don't use your rudder. If a model tracks through a turn, having the nose seek into the turn during bank and yank, it is nose heavy.
There are far better ways of actually testing balance, but this too is a nice little tell to look for.
Freewing A-10 turbine conversion: http://fb.me/FreewingA10TurbineConversion
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Well In my opinion something is still wrong with this jet!. I just got back from flying it and it went down. I flew it last week and it did a little dive on its own but i was able to compensate and land it ok. I figured maybe i was flying it to fast and hard so today I went and flew it scale like and it did a dramatic dive and i was able to get it pulled out and it did it again and i could not save it.
I have the updated servos and the updated rods and links. Hopefully some one can get this figured out.
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