Trio Avionics Wing Servo Mount Installation for RV-4 and RV-6 User Manual
Page 5
Insert the plate through the large lightening hole AFT of the main spar. Place the
bent flange along the bottom of the spar. Note: The image below shows a
prototype reinforcement plate. Your plate will have relief holes and may vary
slightly from the prototype.
The reinforcement plate should slide OUTBOARD until making contact with the tip
rib flange.
Hold the plate in this position, drill though the spar, using the 7 small pilot holes as
a guide, with a # 30 drill bit. Cleco as you go to maintain alignment. Disassemble
and debur all holes.
On the workbench, clamp the reinforcement ANGLE to the back of the
reinforcement PLATE as show in the image below. The top and sides of the angle
should be flush with the top and ends of the plate. The angle flange should be
down. Using the three holes drilled in the top of the plate as a guide, back drill
into the angle. (See image next page)
Cleco the reinforcement PLATE, SERVO, and reinforcement ANGLE in position
(it’s easier if the clecos are on the front side of the spar) and drill through the four
servo mounting that match the pilot holes in the reinforcement plate, and spar
using a #26 drill bit. Temporarily install the 6/32” screws in each hole as you go to
maintain alignment. Now drill the three holes across the top of the reinforcement
plate. Once all seven holes are drilled, disassemble, debur, and prime (priming is
optional).
NOTE:
If installing in the left wing, plate positioning is the same. ALWAYS slide
reinforcement plate to the OUTBOARD rib flange. Should you need to trim
the reinforcement plate, always remove material from the inboard edge.
The servo mounting plate provides reinforcement for the spar at the attachment location
and also serves as a drilling template during installation. In the image below, “you” are
inside the outboard wing bay (right wing), looking forward at the aft face of the spar.
The main tip rib is to your right.
Slide Reinforcing Plate outboard until it
contacts rig flange
AFT SPAR FACE of RIGHT WING
Tip Rib
Pilot Holes