I'm just curious - how small a propeller could I use on a model sub??

I was intended on using a SP400 motor, if that is of any help??

Well, I epoxied these onto the shafts of some 140 motor and am running them wet...
http://www2.towerhobbies.com/cgi-bin...?&I=LXBH79&P=0

For an speed 400, you probably want something bigger though...

http://www.goldmine-elec-products.co...inf....mitem=1

try this on for size it's jusst under 1 inch in diameter and 8 bladed!

Talk about working very very well, I htink I found the best speed performance add on for my subs.


Mark