Continuing on:
1. Installed the engine next which was pretty straight forward other than making a small mod for the Pitts muffler I decide to use
had to cut a small amount away from the bottom of the engine box to allow room to fit.
Trimmed the ply down remaking the keyed interlocking pieces to help with strength and made a ply insert that simply slides in and goes directly on top of the existing floor of the engine box, lightened it up by drilling some holes in it and epoxied into place.
2. Fitted the MLD 28cc engine using the included template which makes things very easy, using the included standoffs which gives you about a 5mm gap between the spinner backplate and the cowl, probably a little more than I would like but it looks fine. Used big washers both inside and outside of the firewall to spread the load forces on the ply.
3. The hole in the lower part of F1 was completely sealed off using some 1/16" balsa to keep the fus clean on the inside.
4.The throttle servo was next and I placed this on the outside of the engine box inverted using some ply and maple mounts. Made a plastic servo horn to fit the walbro carby and used a 2/56 pushrod.
4. The entire front of the plane was then sealed using a commercial based epoxy that I use on all my planes, great stuff nothing touches it once set.
More Later
Cheers Paul