Great Planes Ultra Sport 40 Kit - GPMA0410 - Manual (Page 29)

7. Slide the spinner ring / spinner backplate assem-
biy onto the driveshaft and temporarily hold in place with
the prop and prop nut.
tube) to drill a hole in the chin block for the nosegear
wire. Insert the drill through the holes in the engine
mount and drill down through the chin block.
chin block and the 1/2" balsa top front block. Sand the
glue joints smooth with your T-bar. Fuelproof one side
of the chin block.
8. Glue together the two halves of the 1/2" balsa
13. Temporarily install the nose gear, steering arm
and nosegear pushrod wire. Notice that the pushrod wire
will bind against the chin block in a right turn. Carve out
a clearance slot for the nosegear pushrod in the chin
block. Now remove the nosegear parts.
9. With the fuselage upside down, lay the chin
block in place on the fuse bottom (fuelproofed side
toward inside of fuse). Note how the front of the chin
block meets the spinner ring. By trial and error, sand a
little at a time off the front of the chin block until it mates
at the proper angle with the back of the spinner ring.
14. Lay the top front block in place on top of the
fuselage. Using the same procedure as you used for the
chin block, sand off the front of the top front block to
mate with the spinner ring. Depending on your engine,
you may also have to carve a groove for the needle valve.
In addition, check if your engine mount touches the top
front block, and provide clearance as necessary. Glue the
top front block to the fuse and the spinner ring.
10. Glue the chin block to the bottom of the fuse and
the spinner ring. You may want to use 5-minute epoxy
for this step to allow some time for careful positioning.
11. Cut off and sand the aft end of the chin block
flush with the aft edge of F-2A.
NOTE: If you are building a taildragger, disregard
steps 12 and 13.
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12. Turn the fuselage right side up and use a long
5/32" drill bit (or a sharpened piece of 5/32" O.D. brass
16. Cut the 3/32" balsa dash from scrap balsa, using
the pattern found on the plan, and sand it to fit between