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39 votes
11 answers
57k views

Preventing leaks in motor shafts for underwater bots

Whenever building an aquatic bot, we always have to take care to prevent leakages, for obvious reasons. Now, holes for wires can be made watertight easily--but what about motors? We can easily seal ...
Manishearth's user avatar
  • 1,833
7 votes
1 answer
2k views

Upgrading the motors on a SeaPerch ROV - more torque, or more RPMs?

I am looking to upgrade the motors for SeaPerch underwater ROVs so we can carry heavier payloads and more equipment. My question is, should I look for motors which have a higher RPM and lower ...
Nate Koppenhaver's user avatar
2 votes
2 answers
509 views

Why to seal a motor shaft, or the whole motor, for underwater ROV?

I just finished a competition for underwater robots. The water is about 40-50cm in depth and 90% of the designs just exposed the thrust motors completely in the water similar to the picture below and ...
roTor-roTor's user avatar
2 votes
0 answers
58 views

How to choose a motor for water surface vehicle? [closed]

I am about to build a water surface vehicle (a kind of boat). I was looking for different type motors and ruled out the stepper and servo motors. But I got confused between brushed and brushless dc ...
user82453's user avatar