Great Planes Ultra Sport 40 Plus Kit - GPMA0390 User Manual

Page 42

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1. Retractable Mains/Fixed Tailwheel. Cut out the root

rib so that the retract servo fits between the wing dowels.
Place the servo between the dowels as shown above. Both
a Hobbico CS-63 retract servo (HCAM0160) and a Futaba
compact retract servo (FUTM0670) fit well in this location.

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2. Retractable Mains/Fixed Tailwheel. With the servo in

place, drill a 1/16" [1.6mm] hole through the servo mounting
holes into the dowels. Remove the servo and wick some thin
CA into the holes.

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3. Retractable Mains/Fixed Tailwheel. Install the retract

servo in place with the hardware supplied by the
manufacturer. Remove the servo’s output shaft.

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4. Retractable Mains/Fixed Tailwheel. The retract leg

should have a total length of 3-1/2" [89mm]. Mark the leg of
your retracts at that distance when the retract is fully
extended and cut it with a high speed rotary tool such as a
Dremel Moto-Tool.

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5. Retractable Mains/Fixed Tailwheel. Locate the

leftover 2-56" rods from the pushrods. Cut and bend the wire
as indicated in the retract wire template on page 8. The
template on the top is for the right retract and the template
at the bottom is for the left retract.