Tim Mackey Posted January 29, 2008 Share Posted January 29, 2008 Very good article Andy E - most people would do well to read and digest this - I know I certainly will. Well done. Quote Link to comment Share on other sites More sharing options...
Tim Kearsley Posted January 29, 2008 Share Posted January 29, 2008 I absolutely agree Timbo - a superb article Andy. I never realised there was so much to properly trimming a model!Tim. Quote Link to comment Share on other sites More sharing options...
David Ashby - Moderator Posted January 29, 2008 Share Posted January 29, 2008 He's a good lad that Ellison..... Quote Link to comment Share on other sites More sharing options...
G Posted January 29, 2008 Share Posted January 29, 2008 Really handy article, though I was surprised that aileron differential was missing, I would have thought that was a more common one than say dihedral adjustment. Quote Link to comment Share on other sites More sharing options...
Diamond Geezer Posted January 29, 2008 Share Posted January 29, 2008 so where.s the article Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted January 29, 2008 Author Share Posted January 29, 2008 DG - Home page, top rightGary... I honestly dont know 'cos I aint that expert honest...but would differential affect "trim" as such? I always thought it was to correct adverse yaw and main wing lift caused by different drag effects on an up aileron compared to a down. This would surely apply only during a manoeuvre as such, rather than something one would do to get a model "neutral trimmed for straight and level flight " as it were ?Over to Mr E I guess Quote Link to comment Share on other sites More sharing options...
G Posted January 29, 2008 Share Posted January 29, 2008 Yeah, that's a good point ... same goes for dihedral I guess. Quote Link to comment Share on other sites More sharing options...
Myron Beaumont Posted January 29, 2008 Share Posted January 29, 2008 Or sweep back! Quote Link to comment Share on other sites More sharing options...
PAUL FOX Posted March 20, 2008 Share Posted March 20, 2008 I'm surprised that this article hasn't had much more feedback. It's brilliant!Thanks, Andy. Quote Link to comment Share on other sites More sharing options...
Sparks Posted March 21, 2008 Share Posted March 21, 2008 Thanks Andy, an interesting an informative article. Sorry to nit-pick - ref. Fig 2 and accompanying text. The servo torque remains constant (3kg/cm), it is the force (kg) that reduces as the as servo arm is lengthened. eg 3kg @ 1cm, 1.5kg @ 2cm etc Quote Link to comment Share on other sites More sharing options...
Flanker . Posted June 4, 2008 Share Posted June 4, 2008 Very good information from da main man, though I don't think I'm gonna saw my wimgs in half!Interestingly my FF9 instructions have a lot of this in'em. I like the bit about constant bunts, my models would re kit themselfs if I tried that - the last new aerobat I bought was in 1994! Don't you just hate being brasic! The only thing I got that'l knife edge is my shockie!Anyway thanks Andy, keep on keepin on! Flanker Quote Link to comment Share on other sites More sharing options...
Matt Brewster Posted June 23, 2008 Share Posted June 23, 2008 Great article I have printed it off and will pass it around.Thanks Quote Link to comment Share on other sites More sharing options...
Former Member Posted June 23, 2008 Share Posted June 23, 2008 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Rick Tee Posted June 23, 2008 Share Posted June 23, 2008 Great article many thanx, more detail/advanced info on trimming here for anyone interested. Quote Link to comment Share on other sites More sharing options...
slippyr4 Posted June 28, 2008 Share Posted June 28, 2008 Torque is not kg/cm - it's Kgcm - ie Kg multipled by centimetres. Not to mention that Kilograms are a unit of mass, not force... Quote Link to comment Share on other sites More sharing options...
Steve Murray Posted June 29, 2008 Share Posted June 29, 2008 Didn't I read somewhere recently that adverse yaw is not caused by the drag of the downgoing aileron, but by the lift at the back of the wing twisting the wing to give negative incidence thus driving the wing down instead of up? Early full-size aircraft had to have the wing braced with wire to prevent this? Just asking!! Steve Quote Link to comment Share on other sites More sharing options...
Former Member Posted June 29, 2008 Share Posted June 29, 2008 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Matt Posted June 29, 2008 Share Posted June 29, 2008 Great article.Eric. I don't know if the 747 has this type of ailerons...but...it is a valid method of moving control surfaces. Usually used on slower aircraft, I belive, as control flutter could be an issue at higher speeds. Can work on any control surface, except flaps I suppose.These days I'm not sure that the stick in the cockpit does anything other than tell the computer what you would like to happen. Not like the good old VC10, you can trace the cables and rods all the way from the stick to the control.Would you not adjust the aileron diff to produce a neat axial roll...don't know if you could call this trimming tho'. Dynamic trimming?Matt Quote Link to comment Share on other sites More sharing options...
Martyn Johnston Posted July 16, 2013 Share Posted July 16, 2013 I know Andy knows better than to say "Servo torque is usually rated in 'kilograms per centimetre' (kg/cm)". Note to ed: We keep getting this in the magazine as well. Unfortunately makes the mag look rather unprofessional. Quote Link to comment Share on other sites More sharing options...
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