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Issues with a 380 brushless motor - Advice required!
Hi guys,
I have a technical question - hence I appeal to your knowledge in RC boating.
I have a boat project currently working on. All the internal components are brand new and compatible. Last week I went for a "trial" down to the lake and the boat seemed to be doing fine. However, once in the water it ran for less than a couple of minutes before it stopped!
First the throttle was sort of playing i.e. the prop in the boat was sort of going almost 'dead' - then spinning a little bit more suddenly - and then down to almost no movement.
I changed the batteries in my remote control unit (is brand new by the way) and also thought it was the battery on the boat. So I put in a brand new fully charged battery too in the boat.
The same thing happened again.
I brought the boat to shore and opened it. Checked all the parts carefully - and everything was perfectly in place, perfectly cool temperature
Prop, shaft, couplers, flex cable, ESC, wires, batteries, connections etc
The only thing that was boiling hot was the 380 brushless motor! it was almost starting to 'melt' the engine mount I custom build for it.
I have a copper cooling coil around my motor - though I custom made some water pickups at the bottom of the hull which were not wide enough to allow enough water to pass through!
As a matter of fact I couldn't see any water coming out of the water outlet on the side of the boat (hence no water was passing through). I am working on this water intakes as we speak to allow plenty of water to pass through!
However, I am a bit suspicious about the motor. I know they tend to get hot (of course) but the thing is - it got so hot in just a matter of 2 minutes or even less.
Also - the fact that it basically "stop" working...
Could it be a "defect" in the motor?
or
Could it be the motor has not "enough" torque? and hence is struggling lots to move the prop? It is a 380 brushless @ 2400KV ( i think) i can check on that one if needed.
Something important: After the motor cooled down I took it off the boat and plugged it to the ESC and made it run for 30 secs. It was going fine (i.e. running without shutting down) and the heat didn't build up to be honest. I was holding it with my fingers.
The thing is I did notice a "rattling" sound as it was spinning. Very subtle though... but it wasn't there when i first bought and tested the motor. I "think" it has coped some damage out of that overheating!
I got so frustrated! I have spent the hours trying to build this boat up... and got so excited to see it in the water that day... until this happened!
Could you please share some light as to what is happening? I truly value your input.
Regards.
I have a technical question - hence I appeal to your knowledge in RC boating.
I have a boat project currently working on. All the internal components are brand new and compatible. Last week I went for a "trial" down to the lake and the boat seemed to be doing fine. However, once in the water it ran for less than a couple of minutes before it stopped!
First the throttle was sort of playing i.e. the prop in the boat was sort of going almost 'dead' - then spinning a little bit more suddenly - and then down to almost no movement.
I changed the batteries in my remote control unit (is brand new by the way) and also thought it was the battery on the boat. So I put in a brand new fully charged battery too in the boat.
The same thing happened again.
I brought the boat to shore and opened it. Checked all the parts carefully - and everything was perfectly in place, perfectly cool temperature
Prop, shaft, couplers, flex cable, ESC, wires, batteries, connections etc
The only thing that was boiling hot was the 380 brushless motor! it was almost starting to 'melt' the engine mount I custom build for it.
I have a copper cooling coil around my motor - though I custom made some water pickups at the bottom of the hull which were not wide enough to allow enough water to pass through!
As a matter of fact I couldn't see any water coming out of the water outlet on the side of the boat (hence no water was passing through). I am working on this water intakes as we speak to allow plenty of water to pass through!
However, I am a bit suspicious about the motor. I know they tend to get hot (of course) but the thing is - it got so hot in just a matter of 2 minutes or even less.
Also - the fact that it basically "stop" working...
Could it be a "defect" in the motor?
or
Could it be the motor has not "enough" torque? and hence is struggling lots to move the prop? It is a 380 brushless @ 2400KV ( i think) i can check on that one if needed.
Something important: After the motor cooled down I took it off the boat and plugged it to the ESC and made it run for 30 secs. It was going fine (i.e. running without shutting down) and the heat didn't build up to be honest. I was holding it with my fingers.
The thing is I did notice a "rattling" sound as it was spinning. Very subtle though... but it wasn't there when i first bought and tested the motor. I "think" it has coped some damage out of that overheating!
I got so frustrated! I have spent the hours trying to build this boat up... and got so excited to see it in the water that day... until this happened!
Could you please share some light as to what is happening? I truly value your input.
Regards.
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