engine mounting, centerline & alignment?
 

Puting the EVO Trainer .45 engine on my Superstar. 1st plane so its all new. Superstar instructions say to be sure to mount the engine on the planes centerline, but explains no further. Its an ARF so the mount was already in place. Do I need to just eyeball it or is there a way determine the exact location?

Thanks to the forums I found out i have clamp style of mount and I dont have to replace the mount or redrill it, because when I first looked at it I thought, "Damn, this aint right"

Also thanks to the forums I've learned a lot about thrust angles. Now my guess is I need to set up the engine with no directional thrust. the way the engine sits on the mount, there's enough play that I could unintentially mount the engine at an angle. Again, is eyeballing it good enough or should i say, measure from the windtips to the prop shaft to make sure its square.

Searched forums for this info but no luck.

RE: engine mounting, centerline & alignment?
 

Also thanks to the forums I've learned a lot about thrust angles. Now my guess is I need to set up the engine with no directional thrust. the way the engine sits on the mount, there's enough play that I could unintentially mount the engine at an angle. Again, is eyeballing it good enough or should i say, measure from the windtips to the prop shaft to make sure its square.

um... no. the planes fusalage should already ahve any thrust needed, if not, use washers behind the mount, dril lthe holes in the mount parallel with the mount, donot set engine at angle. this is my guess. it is only a guess and i no im gonna get slamed for this one after my last post, but anyway. id assume that the center line is (vertical) smack dab in the middle (horizontal) in line with the middle of the Le on the wing. if you look at my sig then you will understand why i cannot help with this exact plane.

hope this helps

-balsa-

RE: engine mounting, centerline & alignment?
 

The right thrust should already be built-in. Don't add any extra angle, just mount the engine so that it is straight on the mount. It may look like it points a little to the right, as viewed from the rear, but that is the right thrust already built in. When it comes to where to mount it fore and aft, just make sure you mount it enough away from the firewall to make room for the fuel lines coming out behind the engine. None of the thrust angles are too critical on a trainer unless you can't get it trimmed properly in the air. Even then, a ARF that is difficult to trim usually has a problem relating to how well it was built, especially the tail feathers. Make sure the wing and tail surfaces are square and true to the fuse and you will have no problems.

Jesse

RE: engine mounting, centerline & alignment?
 

thanks
looks like I may be over complicating the issue. will mount it square with the mount and forward enough to clear the fuel lines.