So how bad did I mess up. Despite mounting it over a month ago, I just noticed it today. My engine mounts seem to be slanted inwards, as the holes I drilled must of not been lined up with one another. How bad is this?

How do you mean, slanted inwards? What kind of plane, mount are you using? Is the firewall straight? Got a pic showing it? Would be easier to tell what you mean.

No picture sorry, what I mean is when I drilled the holes, one of the holes is farther out of the other, so when the engine is on the mount, the mounts are straight, they are slanted inwards toward the front of the engine, and going outward at the back, therefore when its mounted on the firewall, there is a small slant to them.

OK if what you mean is that you have two piece mounts an they are a little wider back at the fire wall than they are towards the front of the engine. If this is the case and the four engine lug bolts are all lined up and seated well then you are fine. Perhaps I would secure the mounts to the engine and set the assembly on a table firewall side of the mounts down and if they are not setting flat with a corner protruding a little you may want to file it a little so the assembly sets flat.

John

I'm a bit confused by what you mean, let me try to explain it better. Instead of being at a 90 degree angle perpindicular to the firewall, the engine mounts are at a angle with the firewall great than 90 degrees, so that instead of pointing straight ahead, they point a bit inwards toward the propeller. This was because when I drilled the holes to mount the engine on the mounts, they weren't lined up.

It would be helpful if you woud say if the engine mount is a single or two piece, in other words is the mount a single peice of cast plastic with two beams sticking out or two separate pieces of cast plastic or metal that screw on to the sides of the engine.

On most trainers the goal is to end up with the engines propshaft perpendicular both up, down and sideways with the airplanes firewall. Usually trainers that are designed with down thrust and/or right thrust, is done for you with the firewall itself built in with a down and/or right angle. So just try to end up with the engines prop or crank shaft perpendicular to the firewall itself.

John

The mount is two seperate pieces. The engine itself is pretty perpindicular, but as I said, the mounts arn't perpindicular to the firewall, because when I drilled the holes in them to mount the engine, on each side the two holes arn't lined up exactly, so both of the mounts are angled inwards. In other words, if you were to imagine the firewall as a base and the mounts as sides, they would eventually make a triangle if you followed the line they made.

If the mount halves are secure to the firewall,
and
If the engine is secure to the mount,
and
If the engine is pointed the same direction as if all were square,
then
All is well.

You mounted it a month ago. Have you flown it?

And let us know how your flights go.

Hey Brian long time no see, since RCS. Is that board gone now, it never comes up for me.

John

Hi John!
Nice of ya' to remember! RCShowroom is now:
RC Collective
Kinda slow there, but I guess a few still hang around. Just recently poked my head back in there myself. My schedule kept me out of much r/c until recently.

NCLights:
Note John's first post here. If the back of the mounts don't sit flat on the table, you can take a file or a big sanding block to both mounts at once till they're mostly evened up.

flianbrian

Thanks for the link Brian. I forgot to change my bookmark when they changed the URL.

John