Originally Posted by HoosierGuy
Is that only for WW2 fighters or do most R.C. planes have that down and right (viewed from behind) angle? What about R.C. electric gliders and planes with the motor on top like a pusher glider?
Yes, it's a pretty standard practice to have the down/right thrust angles built in on tractor prop installations of R.C.planes of most types. However, the smaller the prop is in relation to the wingspan and fuselage length, the less offset is needed and none at all is present or needed on some planes.
Pusher installations can have thrust adjustment angles built in also, according to the prop rotation and how far above the wing center line it is.
It often gets some attention on the warbird threads because the prop diameter is larger in relationship to the wing span and with appearance being a big part of the attraction to warbirds, it's easier to notice. Some thrust angle offsets were used on the full scale planes though I can't think of a fighter that used offsets to the side.
Also, most WWII fighters had positive wing incidence on the order of 1.5 to 2 degrees, a few with a tad more. This effectively causes down thrust on it's own though added motor down thrust can be seen on some like the Merlin powered P-51s and the F6F Hellcat.