RE: H9 60 Size P-47 Thunderbolt-Build & Flying
BIRMAN,
Hope this reaches you in time to be of assistance. Sorry about the resolution.
In the 1st pic you can see how I drew the line down the engine mount that corresponds with the driveshaft. 2nd pic shows this from a different angle.
3rd pic shows the vertical firewall line directly between the engine mounts. Notice that this also lines up with protrusion along the bottom of the engine itself. Maybe you can get someone to hold the plane with the firewall facing the ceiling while you position the engine, then mark your new drill holes.
4th and 5th pics show the additonal plywood backing that I epoxied to the backside of the firewall. This was absolutely necessary as you can see the blind nuts overlap the existing "plus sign" shaped backing from the factory.
Pics 6 & 7 show how this will maintain the built-in 'right and down' thrust, and allow the propeller to be aligned "dead center" even though, at the firewall, the engine appears to be mounted incorrectly.
Good Luck!
brewmanbrett