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1. 12:05 PM - CH-701 Jigging Cabin Frame, Firewall and Engine Mount (Perry Delano)
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| Subject: | CH-701 Jigging Cabin Frame, Firewall and Engine Mount |
Hi All,
Following the procedures in the plans and manual for levelling fuselage, Hz tubes
on cabin frame and engine mount, I jigged drilled and cleco'd the cabin frame
to the AC. I supported the assembly at the
bottom of the firewall to get everything level (Fwd fuse is rivetted to rear fuse).
When all was done I pulled the support from under the firewall, and of course
everything sagged a bit leaving
the side tubes with a slight decline angle from level from back to front.
My plan now is to pull apart the cabin frame de-burr, prime and cleco it back together,
then with the support under the firewall installed again, to keep everything
level, rivet the cabin frame and continue with the rest of the Fwd fuselage
structure, maintaining
the support under the firewall to keep everything level until all is primed, de-burred
and rivetted together. This assumes the remaining structure to be added
will stiffen and maintain the structure in a level orientation as dictated by
the plans.
Would appreciate your comments or experience with the latter.
Regards,
Perry Delano
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