They say a model railway is never finished but my SQ is going the same way. I have posted the following in the Brushless Motors section but am adding it here in the hope of a bigger audience.
My Sea Queen was fitted with a Tornado Thumper 3542/05 1250 kv and a NiMh 12v battery. All was running well but the Taymia connectors were not coping. On advice XT60 connectors were fitted all through (I am ok on soldering) and all seemed well on the 60amp ESC. On the water the boat went off ok but soon stalled. I could here the ESC reset and set off again. Motor slowed and stalled.
Thinking the ESC was now the weak point I fitted a water cooled Hobbyking 120amp ESC. On the water the same thing again, motor just fades away. ESC resets and the same happens again.
On the bench, applying power, the motor revs up but then dies, even with throttle at max. Same in reverse. At neutral the ESC resets and the same thing happens. This happens with boths ESCs which have been set up with their programming cards.
So I bought a new 3548/05 900kv Tornado Thumper motor and fitted that. Same thing happens. Battery is 100% and neither escape makes any difference. Even plugging the battery direct to the ESC (no fuse in circuit) the same thing happens. The RX is on its own power. The TX has new batteries.
I am pretty sure all soldered joints are sound and so I am seeking any advice that might solve the problem. The XT60 connector replacements are the only real change in the system. Could it be a bad joint in the system failing under load?
Any thoughts folks?
David.