| Mark,differential on ailerons is a way of making your ailerons much smoother in operation,as you know the downgoing aileron creates lift on that side thus raising the wing,if the other aileron goes up it drag that wing down,what we need to do in effect is gear our ailerons so that the up side is greater than the downgoing aileron,by doing this we avoid what is termed 'adverse yaw' which in extreme cases can reverse the effect of the ailerons,to sum up to fly a model smoothly especially these small models we need to take care of this effect by adding some differential,the easiest ways are to use special bellcranks in the wings,or even easier to simply rake the aileron horn 'forward' so we get the desired more up than down when the servo is in operation.
Another interesting point is that although some aircraft appear to have flat wings with no dihedral in fact the designers do incorporate a few degrees on most machines not noticeable to the human eye,it just gives the aeroplane a more stable sit in the air especially on long cross country flights,on your next model that appears to have a flat wing as scale,try adding a couple of degrees without going overboard and see the difference it makes to the way that it flys.
The swirling or machine effect looks most realistic,the most famous swirled machine was the 'Spirit of St Louis' which had the nose cowlings done in this way.
__________________ 'And there I was oil on my goggles from a broken pipe,then I looked at the altimeter,all I could see was the makers name !' www.wonwinglo.scale-models.net/ |