Hi all,
I am planning to get an electric engine (specifically was thinking of going with ePropulsion Spirit 1.0 Plus) for my small dinghy, Zodiac Cadet Alu 310.
The official website has a pretty good
guide on choosing the shaft length, and it basically says that, ideally, the top of the propeller should be matched with the bottom of the transom.
The thing is, I measured the transom and it is exactly 40cm - which is the switching point between Short and eXtra-Short shaft according to their guide.
On one hand, if the transom is 40cm like mine, seems that, for the XS shaft, the top of the propeller matches perfectly the bottom of the transom. On the other hand, I guess it also depends on how much the transom is immersed in the water, right? My transom seem to be immersed in water for the 12-15 cm, so it would mean that for XS shaft the propeller is immersed in the water for 12 cm only.. would that be enough not to cavitate?
Also, it looks like the price of a too-short shaft is high (cavitating), but I'm not clear what is the real price of a too-long shaft: does it really loose to much in performance to have a 10cm longer-than-necessary shaft? (assuming I don't care that much about not hitting the bottom)
If anyone has experience with electrical (or not) outboards, would appreciate an input!
Thanks
