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Old May 20, 2012, 07:37 AM
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United States, IL, Belvidere
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Controlling torque roll

Hoping that the wisdom out here can help me. Got a YB-22 Park model and it's a ton of fun except for the excessive torque roll to the left at about 3/4 to full throttle. Am using 1300 3cell, DS6i, 7x5 prop. I did program about 40% expo in it. With the 7x5 prop the torque roll is insane and after a few tries I don't dare run it much beyond half throttle. I added a couple of finishing nail in the right wing as the manual suggests but no change. I went to a 6x4 prop and it was a little better but still I cannot give it enough right stick (turn) to counteract the roll. Anybody out here have any ideas? Thanks in advance!!
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Old Jun 01, 2012, 01:46 PM
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What is the motor KV?
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Old Jun 01, 2012, 04:51 PM
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2200kv
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Old Jun 01, 2012, 05:06 PM
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2200KV with a 7X5 is a little much for the YB's. You should go with a smaller prop with less pitch.
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Old Jun 01, 2012, 06:56 PM
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I ended up with a 5x5 that seems to work ok. Tried a 6x4 & still a lot of torque roll. The 5x5 seems a litttle weak though
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Old Jun 02, 2012, 09:14 AM
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The Full size YB's were designed around the 1700KV motor and a 7X5 APC. 2200KV and 5X5 May give you better top speed but less vert.
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Old Jul 25, 2012, 01:58 AM
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2200kv
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Old Sep 08, 2012, 08:02 PM
Really?!?
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I too have this problem, but on a different airframe. It's an Radical Rc Hornet with a Great Planes Ammo 28-45-3600 motor swinging a Graupner 5X5 prop at like 32000 rpm on a 3 cell pack. The torque roll at full tilt is enough to roll the plane with just a bit less force than full opposite aileron can overcome. I used a program mix of throttle to aileron to overcome this but of course that is just adding drag whick slows the plane...What else can be done, besides letting off the throttle?

Chris
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Last edited by ChrisS; Sep 08, 2012 at 11:20 PM.
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