Originally posted by GliderGuy
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This was one of my cautions from my maiden flight report on Motion’s Mig-29, and Alpha later spoke to this on a live Twitch stream as well.
When exploited, this makes for some BEAUTIFUL power tail slides on the model, but invariably terra’firma will claim some as well for people that don’t give themselves a lot of altitude when performing them.
It is why I also cautioned people to fly the model at a more forward CG when trying this. (Yes that can mean on the marked CG markings) Keep working the CG further and further back until you find the limit. The limit happens to be around 3/4 of an inch aft of the marked CG for those who are wondering when flying light batteries. When you get aft of that, she will generally flip over on her back, usually dramatically, and then have elevator authority again from the increased airflow.
I said generally, not always. I got mine to almost an inch aft of the marked CG with light 4400mah RTs while doing some testing, and out of a nose high power stall she proceeded to do a rapid double back flip before settling back into her tail slide. Power to idle and a hard roll to the wing, and she dropped the nose and flew away. Power to idle alone would not recover the jet this far aft, you have to roll off on a wing. The pitch which was fine before when closer to being on the CG marks, was obviously hyper sensitive at this aft CG and required mid elevator rates (usually flying the jet on high) from take off to touchdown, and a very gentle thumb even on 30% expo to fly her back down in one piece. The double backflip and recovery took close to 200ft of altitude, so user beware.
I might also mention that mine has almost 30 flights on it now, and the stock 17g elevator servos have performed great when set up per the manual. This includes unscale rapid G onsets, negative and positive, from low to high speed. It also includes power dives with intentional pull outs 10-20ft over the runway, as well as falling leaf full deflection slams.
For those wondering. You can get her to CG 1/2” aft of the CG markings with 4400mah Roaring Tops right here, using the middle and aft bays. My jet has a sound system just slightly forward of the CG and RC Geek centerburners well aft of it. Moving the middle position battery aft allowed me to fly it with a CG around 1” aft of the markings.
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