Sequoia Aircraft Corporation F.8L Falco, Construction Manual

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F.8L Falco Construction Manual 17–4 Revision 4, March 1, 2002
temporary shim under the channel-nut. The screws for the channel-nuts should not be
installed at this time.
❏
Re-assemble the hinges with the hinge bolts. Check the alignment of all of the hinges.
❏
When you have the hinges in the correct position, remove the 1/4” hinge bolts and
carefully drill the 3/16ӯ holes for P/N 753.
❏
Install the channel-nuts for P/N 753. To keep from moving anything at this critical stage,
the screws for the channel-nuts should not be installed at this time.
❏
Re-assemble the hinges with the hinge bolts. Check the alignment of all of the hinges.
❏
When you have the hinges in the correct position, remove the 1/4” hinge bolts and
carefully drill the 3/16ӯ holes for P/N 754 and P/N 774.
❏
Install the bolts and nuts for P/N 774 (a channel-nut is not used since it would interfere
with the elevator balance weight and arm assembly). Install the channel-nuts for P/N 754.
To keep from moving anything at this critical stage, the screw for the channel-nut should
not be installed at this time.
❏
Re-assemble the hinges with the hinge bolts. Check the alignment of all of the hinges.
❏
When you have the hinges in the correct position, remove the 1/4” hinge bolts and
carefully drill the 3/16ӯ holes for P/N 757 hinges.
❏
Install the channel-nuts for P/N 757. To keep from moving anything at this critical stage,
the screws for the channel-nuts should not be installed at this time.
❏
Re-assemble the hinges with the hinge bolts. Check the alignment of all of the hinges.
❏
At this time the main fin spar and main stabilizer spar may be joined again. Check to
make sure that all of the hinges work well. If you have made a mistake, you may plug the
holes in the spars with wood dowels and re-drill the holes.
❏
The screws for the channel-nuts may be installed at this time. The screws for the
channel-nuts for P/N 751 should not be installed at this time. Pilot drill the wood with a
3/32ӯ drill. Ream the 1/8ӯ holes in the channel-nuts with a 9/64ӯ or No. 27
(.1440ӯ) drill.
❏
Prime the channel-nuts with zinc chromate primer to prevent corrosion, or paint with
epoxy.
Elevator Balance Weight Installation
See Drawing No. 402, Section B-B for the elevator balance weight assembly. Note that the
elevator travel is 22° up and 16° down.
When the elevator is in the full-up position, the elevator balance weight arms will hit the bottom
of the slot in the main stabilizer spar. If the upper elevator stop, P/N 857-8, is not installed, a
stainless steel plate should be glued to the bottom of the slot with epoxy. As an alternative, you
may use any hard thin material such as aluminum or Lexan.