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Old 03-30-2013 | 06:56 AM
  #152  
neilga
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From: Pietermaritzburg, SOUTH AFRICA
Default RE: F3a The Future

I have a trimming question that I hope Bryan can answer. I have read and used your "triangulation trimming" pretty successfully, including running the CG of my pattern plane at 25%. But I would like to know the current trend of where to leave the elevator trim.

I used to fly pattern years ago, and it was always recommended that the elevator trim be set symmetrical, so that it went nose down if the controls were left untouched the same amount inverted as upright. Then your plane would (if you had the incidence right) climb straight up hands free, and dive straight down hands free. But now with fixed gear and positive wing incidence it seems that people are trimming for almost hands off inverted, allowing the plane to fall a bit inverted. Is this correct?. This makes a big difference to all the other trims for vertical climb and dive.

Thanks
Neil