Hi All, I have just finished my second build. My first was a Revel Flower Class corvette converted to RC. I fitted a cheap £5 MFA385 motor running on a 7.2v Nimh battery. Because of the 2.5kg of ballast, the model is quite heavy but with a nice 45mm brass prop, it pushes it along very nicely. Moving on to my second build, I picked up a Deans Marine Dimarcha kit quite cheap. I came with 2 Deans Kestral motors, the recomended ones for the kit. These looked huge compared to the tiny MFA385 I fitted in the Flower Class, so perhaps I was expecting too much, but I was a little underwhelmed by the performance on it's first outing last week. For ease, I went with one ESC and a single 7.2v Nimh battery, driving the 2 Kestrals through 2 counter rotating 30mm 3 bladed nylon props. Speed wise, I would say it is about the same as my Flower Class, maybe a little faster, but I was expecting a bit more especially as the boat is much lighter than the corvette, although to be fair, the max speed of the full size boat is 19 knots so the model speed is probably close to scale. The problem I have is for my next build I have picked up another Deans kit, an MTB 488, the speed of the original being twice as fast as the Dimarcha at 39 knots. The recomended motors are again a pair of Kestrals, so what I am looking for is how to get the best out of them and understand what is holding back the Dimarcha.
In the Dimarcha, the motors are wired in parallel, will this and the single battery/ESC make the difference? Would I be better with 2 ESCs/batteries? Would 35mm propellors make things better or worse? As I am very new to this, I have no idea which way to go. I have seen videos of the Dimarcha running on twin Kestral motors with 6v batteries, and it was quite a bit faster, but I believe it had twin ESCs/batteries.
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Topic: Advice on propellors, motors and ESCs (Read 918 times)