The idea of a model based on the sternwheel paddle boats that ran on rivers like the Mississippi has always had some appeal. The only problems I could see where their high freeboard and shallow draught which would make sailing in all but calm conditions (not too common in the UK) very tricky. Steering, even with "backing" and multiple rudders would likely be poor along with risk of damage from typical pond debris.
Possible solutions would occasionally "pop" into my mind, most were impractical and thus immediately "popped" back out! The final solution came to me during a meeting, when I really ought to have been thinking about other things. That was to base the model on a smaller push tug type of vessel and use a "split" paddlewheel, with each half being independently powered.
It looked to be in the "doable" zone with the only question being interaction between the two paddles when turning in opposite directions. A quick test of the part built model on the garden pond showed that this was not problem and steering looked good using the transmitters "elevon" function and two ESC's.
The model was quickly completed, its about 25" long and 6" beam with a notional scale around 1/32 and powered by two RE385 motors. Just had its first proper sail and gave me no trouble. It can rotate on the spot or turn in any radius circle you desire. Gentle steering corrections are needed to maintain a straight course and top speed surprised me being approximately 2ft/sec. Quite relaxing yet involving to sail and I do like the sound it makes.
Glynn Guest