Attach Firewall

Holy Cow - lots to talk about today!!! Main task for tonight is to line up and drill the Firewall assembly to the fuselage. This not that difficult, just time consuming.

Begin by clamping the engine mount attach brackets to the main longerons. These have to be lined up correctly in order to get proper rivet edge clearance and to make sure the plates are flat against the longeron angle. This is important as this is what holds the engine on the plane. Can't have the flying off somewhere. Hint, the plane is upside down.

 





once it is lined up correctly, then the holes can be drilled. This is stainless steel. I ended up ruining a drill bit before I was finished. This happened even though I used Boelube on every hole.



Then I can drill the Engine mount attach brackets. (The bronze colored Clecos)





A shot from the inside to confirm that I have the minimun 1/4 inch center to edge clearance.





A shot of the whole bracket.