PT-109

Motorised 1/72nd Scale Revell PT-109.

Beam = 3.5in Length = 13in

Weight = 250g or 9oz

MOTORS = 2 Futaba FP-S128 4.8V servo motors

PROPELLERS = 10mm 3blade plastic left and right handed pair

SPEED CONTROLLERS = Futaba FP-S128 servo controller

RUDDER CONTROL = Not fitted, tank steering used, channel 2 stick rotated 90'

TRANSMITTER = ACOMS Tecniplus model Ap-202 27MHz 2 channel proportional

RECEIVER = ACOMS model AR-2/27 2 channel 27MHz with BEC

POWER SUPPLY = 4.8V 4 * 700mAh NiMH AAA cells

	Box artwork.
	22 August 2005. Futaba FP-S128 servo stripped down to show motor, contoller and centering potentiometer, pots are superglued in the neutral position, when both are adjusted to stop, connect via a Y-lead for this operation.
	22 August 2005. Motor and propshaft installation, propshaft is 1.6mm brass rod running in a 10mm long brass tube, silicon tubing as a coupling. Propellors are from a very cheap small RC toy boat, the only worthwhile parts on it.
	24 August 2005. Motor installation, motors on a 1/8in basla wedge to follow propshaft angle, 1mm styrene dams to hold silicon sealant away from keel where cells will lie later.
	24 August 2005. In the test tank (bath), all working correctly.
	09 September 2005. Radio watertight compartment, receiver uncased to reduce size, parts attached with silicon sealant, servo pots locked with a blob of epoxy.
	09 September 2005. RC install done, polystyrene foam bouyancy added, ready for the deck to go on.
	07 October 2005. Completed model.
	07 October 2005. Completed model.
	07 October 2005. Completed model, props changed from toy plastic ones which reved highly but made the boat slow, to propshop brass ones, new propshafts with M2 threads made from 1/16in brass.
	10 Octoberber 2005. First completed sailing.
	10 Octoberber 2005. First completed sailing.
	10 Octoberber 2005. First completed sailing.
	10 Octoberber 2005. First completed sailing.
	10 Octoberber 2005. First completed sailing.

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