Underwater ROV Brushless Motor Test Part 1 of 3

[rcflux]

talk to some people on rc forums like Ultimate rc or rcgroups. They can help you well.

[remotelycompetent]

5:15 "that's a chinese 30 amps, probably 10 amps" HA! i love it.

[MegaRallycar]

If your going to be running a brushless motor under water then your going to want to run a sealed can motor with plastidiped ends, Ive done it and its fine with no corroding. Take it from a rc hobbiest whos been in the hobbie for more than 3years

[submarineboat]

@MegaRallycar We are going to run them below 1500 ft of water so the object is to avoid seals that would fail.

[MegaRallycar]

@submarineboat Holy crap, are you talking proffessonal hobbie grade sub, then my other suggestion would be a brushed motor, never fail under water, they run better under water because of cooling and cleaning, and smoothing the brushes inside

[submarineboat]

@MegaRallycar I've not tested brushed motors exposed to salt water. They are used in oil compensated thrusters but I think the stay currents from the exposed brushes would cause problems if exposed. They do work fine when exposed in fresh water. We can rinse the outrunners with fresh water after each use and replace them for $20 when the salt eventually destroys them, but the we never have to worry about a seal leaking or cooling.

[tugfitz]

sometimes the strain on the motor makes the ESC quit.. your issue is once your connection between the motor and esc on the wires themselves (about 3 inches up from the motor) short, then your ESC scrams. insulate your wire connections a bit better and you will do just fine. additionally look at the manual for the ESC, the ESC is using your motor as a speaker, the beep sequence has a specific meaning.

[robotictube]

your using an brushless motor and ECS, when the motor stalls out like that its becuse the motor wroks to hard in the water and the ECS cant deliver enough power :) and the beepings comes from the ESC inpulses ( motor runs on inpulses ) the diferent beeps meens "alot" battery conected whit Nmh "beep beep beep" ore with Lipo "beep beep" somethings wrong beepbeepbeepbeep and so on :) cheek the manual for the ESC :)

[submarineboat]

Not much, but subcommittee's web site is a great place to find what you need.

[SirArghPirate]

Do you know anything about making RC submarines?

[SirArghPirate]

This is cool! How will you make the propellar axle watertight?

[submarineboat]

There is no need to make a watertight seal. The whole thing will be exposed to the water.

[submarineboat]

Should be 1000 rpm's per volt, so 12,000. Mr GIS.

[oke12255]

how many RPM's is that on full throttle???hahahahah man