I have been building the new CMP P-40 arf and have hit a bump......

The plane has come with a piece of crap antivibration engine mount..... I went out and got a better one from dave brown


but the problem is that if I use a anti-vibration mount... it will raise the level of the engine thereby offsetting the spinner....

when they made the plane they lined it up for a direct mount only..... so why include the vibra mount???

I included some pics.....

Do you guys think the wooden mount is strong enough to mount the engine (150 Saito 4S) direct???? remember this plane has a fiberglass fuse.


please help













If I mount the engine direct it lines up just fine.

you'll get more informed opinions but:

I've read that if you "lose" the anti-vibration component, you'll be just fine.

I have this plane but have not started yet . How about this .
Add ply reinforcement to the bottom of the current engine rails so they are thicker .Run this from front end to the first former , at leaset 1/2 thick . Now use a dremel tool , and burrow down a neat perfact slot for the clearance of the anti vibration mounts . This way you still have a good thick base to mount the engine but you also have a nice cavaity to allow for the anti vibration mounts .

decided to countersink the engine... here are the pics:



















decided to use the soft mount.... I remember that in my wm p40 w/ only a .82 saito I got glitches at low rpms due to vibrations...

Reinforced w/ additional ply below.

Thanks for the help all.