Seaview

[greenman407]

Thanks. If youll notice this link, it shows the relative speeds of brushed motors.A 55 turn is 7700 RPM. If you run a 3 to 1 gear ratio thats only 2567 RPM and thats no load. It would drop under load. According to the chart, their 28 turn would turn 14,500 no load. At 3 to 1 that would be 4833 RPM no load. Perhaps that would be better.http://www.ansmann-racing.de/cms/eng...ic-motors.html

[greenman407]

Our Ebay has nothing like that, that I can find. The links that you posted give some useful info about the motors, so that you can make a informed choice about what you are buying.

[Subculture]

Those people wont ship to the U.S. Ill look over here at our Ebay.

Ahh, okay sorry about that, didn't spot the U.S as an exclusion. I've ordered from them and found the products good.

If you want to go for a car motor, then you should be looking at either a 45t or 55t motor.

[greenman407]

Those people wont ship to the U.S. Ill look over here at our Ebay.

[greenman407]

Thanks Andy. I was going to reduce the voltage on those motors to 2 cell LIPO (7.4)since they are rated for 7.2 volts as most cars are. The good thing about the first link you showed was that the shaft is 20mm long. Much better.

[Subculture]

The motor you linked to will run hotter than hades on 12v, too fast, plus it's blooming expensive.


500 size.Will give you 5000RPM unloaded shaft speed geared 3:1.

http://www.ebay.co.uk/itm/3750-15000...item1c35427e75


Bit slower-

http://www.ebay.co.uk/itm/DC-12V-135...item43bbc67fce

[greenman407]

500 size would be perfect.

[greenman407]

Heres one I have been looking at. The shaft is a little short but I might be able to make it work.http://www.amain.com/product_info.ph...tric-Motor-27T
Im thinking that a 35 turn crawler motor would be too slow. What do you think?

[Subculture]

Im sorry Andy, I didnt give you all the info, they are running 3 to 1 gear reduction.

500 or 400 size motors?

[greenman407]

Im sorry Andy, I didnt give you all the info, they are running 3 to 1 gear reduction.

[Subculture]

Never been easier to find, you just have to know where to look, Mark.

For your props running direct drive I would suggest you don't want a speed of any more than about 4000RPM loaded.

These would work-

http://www.ebay.co.uk/itm/DC-12V-Vol...item1c3847e6f2

http://www.ebay.co.uk/itm/DC-12V-0-2...item1c34d13dbf

[greenman407]

Andy, they are two bladed empellors in a cort nozzle of sorts, measuring 1&9/16" in Dia. The motors get so hot that they lose power and you barely get back to shore. Im thinking of going to a Modified motor in the 27 turn to 35 turn variety.
The motors that come with the Subdrivers are usually fine, but perhaps being in a nozzle causes extra drag that they cant handle. If you take one of those motors out of your Subdriver, you can turn them very easily by hand. If you take a Modified brushed motor that you find in a car model for instance, those motors are much more difficult to turn by hand owing to stronger magnets. Im thinking that, that alone tells much about there power generating capability. Brushed motors are becoming harder to find. Not much of a selection out there. The ones I have found have a very short shaft(1/2") which will make it more difficult to install.

[Subculture]

Refresh my memory Mark- what size of prop are you trying spin?

[greenman407]

OOOOPPPPSSS!!! Looks like I stand corrected. The motors that Mike sent me WERE the 12 volt motors. What a Bummer Dude. They dont have enough torque. Ill have to search far and wide for suitable motors. Probably have to experiment with different wind motors and different number of blades on the empellors.

[greenman407]

I need to reuse the small drive gears on the shaft. They are glued on there with Permatex Green Sleeve Retainer. So, I took a water hose on low and let it run over the shaft to cool it while I wacked off the motor shafts, just behind the gear. Im trying not to melt down those white Teflon shaft seals on the same shafts. Then Ill take those gears and heat them up with a torch and push out the old shaft remnants. OH CRUMS!!!