Thanks guys. I've been 'lent' a completed but neglected Precedent 1/24 Perkasa (1250mm) and it got me thinking, could it be converted to a Brave class boat (patriotism & all that). Hence the enquiry about the superstructure / bridge moulding...
On reflection, I think it's more sensible and rational to simply put the Perkasa through a modest refit to get it shipshape again. Aside from the aesthetics, the running and electrical gear is fairly 'vintage'. The radio is 2 channel Acoms from - I reckon - about 1990 and there is interesting 'growth' on the servos and general rat's nest of bell wiring inside the hull. Think it is time to start again there.
There's a single shaft and I can't get any life out of the motor, which is wired to run from two 6V sealed lead acid batteries in series. The motor is about the diameter of a coke can (and about half the length) but other than that no distinguishing marks.
What replacement would be good for this hull? I'd like the boat to plane properly but not stand on it's transom & try to fly... Brushed or brushless? There doesn't seem to be a lot of difference in price between a decent (850 size?) brushed motor plus ESC and a brushless motor / esc but I may be comparing apples and pears! What size brushless outrunner (Kv / watts) would you go for? Presumably don't want it to run at ridiculous RPM so low Kv is best? Batteries? I have a 4000 mAh 3s (11.1 volt) LiPo battery from my big motor glider. Would that be suitable?
I've read that a 50mm prop (3 bladed?) would be about the right size for this ship. Do you agree? Is a water cooled motor / ESC a good idea or an unnecessary complication? How & where does one install the water inlet; does the system operate by simple positive 'ram' effect through the water?
Sorry for all the questions & thanks in advance for any answers. All advice gratefully received!