sig 1/4 scale cub Engine thrust Q's
I have added 2deg right thrust. I just could not imagine trying to take it off with out it.
Thanks
Pat
I built, according to plan and flew a Sig 1/4 size clipped wing Cub for many hundreds of successful flights over a more than 20 year period on both wheels and floats. I flew it in both Canada and the USA. I flew it on numerous lakes and rivers and at numerous fields and airports, including off field ops on a couple of cross country runs. I flew it on calm days and others when the wind just about tore the windsock off its pole.
Build the plane as the instructions show. Use an engine more or less in the suggested size range. Whatever thrust is built in as per the plans is all that you need. Period.
Mine flew behind an inverted, fully cowled OS 1.08 and Slimline inverted muffler, swinging a Zinger wood 15-8 prop without any engine problems.
End of story on thrust angles for that plane.
I also built this plane according to the plans and it takes off and land just fine. I am running a OS FT 160 twin in mine and I love it.
This plane has such a long tail on it, which makes it easy to correct any thrust from the prop on take off.
I would not change anything from the drawings, remember SIG did not just through the thing together, they have spent hours testing and engineering their planes before putting them on the market. Just because someone else’s plane needs two degrees to the right doesn’t mean this one does.