Ford Tri-Motor - Scale model airliner for RC and electric power.
Quote: - "Build a Tin Goose! Ford AT5 Tri-Motor. Here's Dennis Tapsfield's 59in span version for electric power ...it will take off from a smooth surface and properly handlesd will fly in a sedate scale-like manner and evoke oos and ahs from appreciative spectators. The flight times are in the 5-6 minute bracket, using the series-parallel switching system for the motors. This makes use of the servo to operate a slider system with micro-switches which gives two power levels; the first position applies full voltage to the middle motor and connects the two outer motors in series; the second position connects the two outer motors in parallel, ie full power. The output in the first position is enough to maintain altitude with a considerable saving in battery consumption... "
Ford Tri-Motor, Radio Modeller, February 1978.
Direct submission to Outerzone.
Article pages, thanks to RFJ.
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