Hi
I have just finished (Christmas) a Perkasa 37 inch model and it was an Aerokits model. The scale for the 37 inch version is 1:32, if it was the larger version it would be 1:24.
Some versions had single motors, some 2 and some 3, dependant on the kit or your choice. If it is your first kit it might be better to stick with single prop, motor and rudder as less RC requirement in the form of speed controllers or mixers.
What type of hull is it, ply, fibreglass or ABS ?
Alan