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Pt 109

Old 03-12-2020, 08:45 PM
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beachsideflyer
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Default Pt 109

I’ve recently acquired a ProBoat PT 109 40 EP. It is 40” in length and has twin screws, the esc as well as the motors are water cooled, at least they’re supossed to be but there is no water flowing thru ether one from the rudder ram pickups.
I have carefully shot compressed air thru the cooling system of both the motors coil cooling loops and the esc and all seems clear with no clogs. Even at full throttle, no water exits the side mounted dump ports. Has anyone come up with a solution for this ?
I’m not very experienced running R/C boats, more into planes but this model is really detailed and I dig it! Also is there a way besides repowering it to make it a little faster? It is running on two 7.2 Venom 3300 NiMH packs. Thanks, Phill.
Old 03-13-2020, 04:15 AM
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rgburrill
 
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Go to a higher pitch prop. But you do need to get that cooling figured out because a higher pitch prop will put more load on the ESC and motor. Perhaps your pickup lines aren't installed correctly.
Old 03-16-2020, 08:13 PM
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Hydro Junkie
 
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Something isn't routed right. Can you post some pictures of the bottom, both inside and out, so we can take a look
Old 04-22-2020, 06:56 PM
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Madcow63
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What pickups are you using
Old 06-24-2020, 08:49 PM
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satlite440
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you could wire in a water pump of the batts
Old 06-26-2020, 11:29 PM
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mfr02
 
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Originally Posted by satlite440 View Post
you could wire in a water pump of the batts
Yes, but the better way is to have the pickup in the right place and facing the right direction.
Also, not much point in a series arrangement - using the cold water to pre- heat it with the motor makes a heater for the ESC, and vice-versa.
Old 06-28-2020, 09:52 AM
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satlite440
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Originally Posted by mfr02 View Post
Yes, but the better way is to have the pickup in the right place and facing the right direction.
Also, not much point in a series arrangement - using the cold water to pre- heat it with the motor makes a heater for the ESC, and vice-versa.
personally i would do 2 low pressure pumps 1 for esc 1 for motors to avoid the heat..using 1 pump for both seems lazy and they dont draw much current off the bats enough to notice. i would use the same kind of pump i use in my type 7 sub to clear the ballast tank the contoler bord is optional they are at nautalus drydocks
Old 06-28-2020, 11:41 AM
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I would put a "ram pressure" pick up for each item(this could also be one for every two if you run more than one shaft with it's own motor and ESC) to be cooled close to the stern. Obviously, these would need to be through the bottom of the boat to make sure they are always in the water.

Last edited by Hydro Junkie; 06-28-2020 at 11:44 AM.

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