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[BruceD]

Where can I get information on determining the right size motors for a boat?
I just received a Radio control Dumas Kit PT-109 1:20 scale 48" long.  along with a Elco mosquito conversion kit to make it a PT-596
I'm trying to figure out what to use to Power it. the boat is a triple prop shaft.
Has anyone built this boat?
I'm trying to stay to the 1:20 scale so I need to stay with the 43 naut's scale speed.
How do I determine what motors to use?
What size Prop is needed? Diameter. Pitch?
I Understand that I can use 2 motors and remove center prop when on the water. So, if I used two motors, I assume I would need larger motors for 2?
Thank you

[tica]

I'm building a ELCO 80 PT109 in 1:20 Designed by  "bensworx"
I'll be using 3 Exceed RC Rocket 3025‐920kv  out runner brushless motors as recommended by Ben, and a 4S high capacity LiPo or 3 small ones.
He also recommends 40A ESC FWD only (to save money) for the outer motors and a 40A with revers for the center motor.

Regards Carsten

[BruceD]

What size prop are you using? Dia. Pitch,  # of blades?