Harry Wilson Posted April 1, 2012 Share Posted April 1, 2012 Hi, I've got myself a 2m powered glider (foam but it seems to work ) however I'm not sure how best to slow the thing down for an approach on a small field. Am I best to dial in down flaps on the flaperons or up flaps with corresponding elevator adjusments. Killing the speed is what I'm mainly after here - I think! Its an ASW 17 if that helps and I've got an Optic 6 Tx so plenty of mixing options if I knew what I was doing. Thought I'd ask before opting to experiment Cheers, Harry Quote Link to comment Share on other sites More sharing options...
Tim Hooper Posted April 1, 2012 Share Posted April 1, 2012 Harry, I'm no expert, but I think that if you have seperate, inboard flaps (as well as ailerons), then they need to droop down. However, if you're talking about using the ailerons alone to slow it down, then I'd suggest having them rise up as spoilerons. This will help prevent an tendency to tip-stall at low speeds. tim Quote Link to comment Share on other sites More sharing options...
Devon Flyer Posted April 1, 2012 Share Posted April 1, 2012 I tend to use both ways depending on the type of glider. If it's a floaty / draggy type airframe I will use up spoilerons to kill lift and act as brakes. If it's a bit slippery I tend to use down flapperons which will slow it a bit and give more lift at slower speeds. With both ways I tend to have aileron to rudder mixed in when the brakes are switched in, just to give a bit more directional authority and brake to elevator mixed in to compensate for any changes in pitch. It's all a bit trial and error and as Tim says - beware of promoting tip stalls. Quote Link to comment Share on other sites More sharing options...
David Hodgson Posted April 2, 2012 Share Posted April 2, 2012 If you have seperate flaps and ailerons the best method is crow brake. Flaps down, ailerons up. Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted April 3, 2012 Share Posted April 3, 2012 The problem is an ASW17 is a pretty slippery shape so a steep descent into a small filed is always going to be a speed issue. To control the speed you need drag. The problem is flaperons or spoilerons can only create a certain amount of drag without compromising their function as ailerons, This ultimately limits how steep your approach can be. Remember a full size ASW17 is virtually impossible to land safely without using its air brakes and they stick out at right angles to the airflow! The best solution for small field operation will be either true air brakes or flaps that drop to at least 70 degrees preferably with a proportional control. You will then be able to make steep, speed controlled approaches. With just flaperons/spoilerons you either have to land faster than you would like (fly it into the ground with possible damage) or get good at low, slowish approaches (but serious consequences if you get it wrong!) or find a bigger field. Quote Link to comment Share on other sites More sharing options...
Harry Wilson Posted April 11, 2012 Author Share Posted April 11, 2012 Well I seem to have survived the first half a dozen flights but the challenges you all mentioned are very real with this model. For the money as a complete package it was pretty good value...you can't have everything. Thanks for all the informative responses. Much appreciated. Harry Quote Link to comment Share on other sites More sharing options...
Ben B Posted May 28, 2012 Share Posted May 28, 2012 I have recently been looking at this (hence finding this thread). My understanding is that Flaps under-camber the wing but can leave the wing-tips effectively with wash-in which can lead to tip stalls. Spoilerons kill lift, the only problem can be that they increase the stall speed of the wing by introducing the opposite of undercamber. Quote Link to comment Share on other sites More sharing options...
enrico Posted May 28, 2012 Share Posted May 28, 2012 Up aileron with up elevator correction degrades the glide angle on my Wasabi and Volti no problem Edited By enrico on 28/05/2012 12:02:45 Quote Link to comment Share on other sites More sharing options...
Harry Wilson Posted June 4, 2012 Author Share Posted June 4, 2012 Ah ok guys...I will experiment with up and see Harry Quote Link to comment Share on other sites More sharing options...
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