Decided to try this setup on 6S before swapping the motor out for a 1512 2650kv on 4S.
Setup is: Castle 3424 1800kv outrunner, Turnigy 180A ESC, 6S, Prather 215 40MM prop. Never expected it would GPS close to 60. I was thinking more like 50. After the video everything was no warmer than 90*. I will try to break in to 60MPH with a 42x55 prop next time out. The boat was running in to the wind coming at the camera which is why it gets a bit out of shape at 1 point.
Video
This app is very accurate. I checked it against my car's speedo and its good till about 80mph. Then it starts to vary by 1-2 mph.
Setup is: Castle 3424 1800kv outrunner, Turnigy 180A ESC, 6S, Prather 215 40MM prop. Never expected it would GPS close to 60. I was thinking more like 50. After the video everything was no warmer than 90*. I will try to break in to 60MPH with a 42x55 prop next time out. The boat was running in to the wind coming at the camera which is why it gets a bit out of shape at 1 point.
Video
This app is very accurate. I checked it against my car's speedo and its good till about 80mph. Then it starts to vary by 1-2 mph.

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