Originally posted by bandetx
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I fly it off of grass and this EDF has the most trouble getting airborne of any I have on grass. The Mig, in contrast, gets off our grass runway with ease. A couple of suggestions, especially if you are on grass. Flaperons helped tremendously, which I see you plan on using. Very helpful on take-off and on landing. I also had to change the 1 7/8" nose wheel to a 2 1/4" nose wheel to help get it's fat arse off the runway. Full up elevator at the start of the take-off run (but reduced to slight up at take-off speed) to help relieve any downward pressure on the nose, otherwise it would not get enough take-off speed. The fuselage has carbon fiber tubes along each side, but for some stupid reason they end just short of the entire battery bay, leaving the front nose section supporting a heavy battery with only foam support. I added carbon tubes along both sides of the front fuselage the entire length of the battery bay. Did it need it, not sure but I've seen the front section crack off easily on a less than perfect landing. I fly it with the HRB 6000, weight 824 g. I tried to fly it with a HobbyStar 8000 mah 100C, which weighs 890 g. It did get airborne, but that extra 66 g of weight resulted in not being able to go vertical AT ALL with the SU-30. And not from CG being too nose heavy, balanced both at about 140 mm (I believe that the manual has a CG range of something like 115 mm to 150 mm but the closer to 150 mm you can get, the better it will fly, take-off and land - at 115 mm it's like driving a semi). That same battery (HS 8000) in my F-16 resulted in very similar flying characteristics versus the HRB 6000, so if the SU-30 is so sensitive to just a hair more weight, it's virtually at it's flying limit stock!
I'm not trying to discourage you regarding the jet, just don't expect it to be something it's not. It's no Mig-29, but until we find out what are causing some of the mystery crashes, I guess the Mig has some issues as well, but in the end I have my bet on the Mig. I'll still fly the SU-30 and have fun doing it, so I hope you also will have fun with it. It does impress anywhere it goes!
A video of the SU-30 on grass with the HRB 6000 and the HS 8000:




The field is surrounded on 4 sides by thick bushes & Trees .. If a plane goes down a Tracker is required otherwise there’s no chance of ever recovering the plane .. Hazards of R/C ..Gotta be a Bush Pilot to survive..
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