Where are you guys buying your motors?

[froggyman]

I'm looking for brushless motors for my ROV and was trying to find different places to compare prices and products. So far the only two places I have found have been hobbyking and my local hobby shops. Where do you guys get your motors?

[bikerbones1968]

I got mine off ebay. The company is rctimer they have thier own website and ebay store. These are great motors and very inexpensive.

When you are selecting components here is a few tips to keep in mind.

1. Be aware of the operating voltage the motors are rated at and what your power supply delivers.

2. Make sure you buy sensorless brushless. Unless you are running in dry enclosures and magnetic couplings etc you will destroy the sensored type as soon as it gets wet.

2. Get low KV rated motors. Typically somewhere around 750kv to 900kv are good. kv ratings are the RPM per volt so a 12 volt supply on a 5000kv rated motor will spin it at 60000 RPM at full voltage. This kind of speed will create what is called prop cavitaion and this is not what you want.

3. Prop adapters. They come in a variety of sizes and with various ways to be mounted. The key here is to know the shaft diameter of your motor and get a prop adapter according. Make sure your props are sized to fit the adapter also.

[froggyman]

Thanks for those tips! I think we got the voltage part covered . We have 3 700W high DC/DC converters to convert the 48V we're sending it to 12V (trimmable to 11-13V).


How fast are they on shipping the motors?

[bikerbones1968]

To the best of my memory if you order directly from the rctimer website its pretty quick, 8 -10 days. They are located in Hong Kong and not mainland china. Anything coming out of mainland china you can expect 20 to 30 days delivery. Mind you I am in Canada so it will also depend on where you live. Just so you know the Chinese New Year holidays are in February and if anyone buys from China you best get orders in now to avoid very long delays. Nothing is open during the New Year.

[timothyalderson]

I got a awesome set I hacked from some Costco kids pool bumper boats. High torque and geared etc look at my other post