Marine 5000 Brushless Outrunner Motor

[Blackjack-sven]

Does anyone know how good this motor would be as a replacement for the stock 1500 Kv blackjack motor?

Marine 5000 Brushless Outrunner Motor

Specs

* Type:Brushless Outrunner
* Bearings or Bushings:Ball Bearings
* RPM/Volt (Kv):4753
* Resistance (Ri):0.011 Ohms
* Idle Current (Io):4.2A @ 6V
* Maximum Burst Current:70A (490 watts)
* Cells:2S Li-Po / 7 Ni-Cd/Ni-MH
* Speed Control:60-80A Brushless
* Weight:122g (4.3 oz)
* Overall Diameter:36mm (1.4 in)
* Shaft Diameter:5mm (0.2 in)
* Overall Length:52mm (2.0 in)

[DISAR]

The KV is extremely high...I have seen these motors before, though I don't know them. Try getting something upto 2100 kv, to run 4s. Max rpm to consider 30000.

[Blackjack-sven]

How fast do you think this motor would push a blackjack 26bl?

[calcagno45]

I wouldn't run that motor in a BJ26. Too high of a KV.

[Ub Hauled]

they have different versions of that motor, find one with less Kv...
They are French motors and some guys I spoke to say they are well made
and a bit on the expensive side, but good motors.

[Blackjack-sven]

Whats the reason for going with a lower kv? I thought that the higher the kv the faster the boat.

[D. Newland]

It also is only 122 grams. Nearly half the weight of the BJ motor. 490 max watts. There's not enough mass to help disapate heat in a "bigger" hull outside of the design spec's of that motor.

For motor and ESC longevity, you need to keep your RPM's in line. That motor is a 2S motor for a micro boat.

If you are looking for more motor for a BJ, look at the 9XL feigao's weight and Kv. That will get you specifications that are in the ballpark for a motor upgrade. Then you'll need a new ESC, too. Something in the 100 to 120 amp range. Then you'll probably need to upgrade the steerable strut...it's never ending.

[ED66677]

yep good French stuff! expensive, well made and as far as I read on french forum not very much used!

[DISAR]

Whats the reason for going with a lower kv? I thought that the higher the kv the faster the boat.

This is what everybody thinks when starting brushless motors. Totally forget it.
Please read first this
http://forums.offshoreelectrics.com/...ead.php?t=4159

Your kv should be in line with your batteries-esc-prop. It's quite complicated but you will realize it. For example
3s - 2200-2600kv, 4s setups 1900-2100 KV, 5s 1500-1900, 6s 1200-1500 etc...

[Blackjack-sven]

That motor is a 2S motor for a micro boat.

Does this mean this motor would be good for the mini-c???

[Blackjack-sven]

http://forums.offshoreelectrics.com/...ead.php?t=4159

When it says 12 cells 24"-29", does this mean 2 6cell packs?
What would the BJ 26 bl use?
BTW: my current setup is stock esc, spectrum radio, stock servo, grimracer 40x52/3 prop, 4600 NI-MH batteries, and stock motor. I'll be getting a radar gun soon but it seemed that it went slower. It definitely took longer to plane but is the possible lack of speed due to the 3 blade prop? Is a 2 blade prop better like the Octura x642?

[DISAR]

When it says 12 cells 24"-29", does this mean 2 6cell packs?
What would the BJ 26 bl use?
BTW: my current setup is stock esc, spectrum radio, stock servo, grimracer 40x52/3 prop, 4600 NI-MH batteries, and stock motor. I'll be getting a radar gun soon but it seemed that it went slower. It definitely took longer to plane but is the possible lack of speed due to the 3 blade prop? Is a 2 blade prop better like the Octura x642?

12 cells, yes it is 2 6cell packs. Regarding the BJ 26 do not know the boat and what KV the stock motor is. I have only one advice for the moment, in RTR boats changing one thing (let's say motor) may result in changing esc also and later on changing shaft etc... there4 be ready.
This person put an Ammo 2300KV, 4s lipos
http://forums.offshoreelectrics.com/...ead.php?t=6942
Also this section of the forum has a lot of info on BJ. I do not have this boat but I am trying to help.
http://forums.offshoreelectrics.com/...splay.php?f=13
Another advice is that if you can afford it go to lipos.
I've been in Wilhemshaven once.

[Doby]

When it says 12 cells 24"-29", does this mean 2 6cell packs?
What would the BJ 26 bl use?
BTW: my current setup is stock esc, spectrum radio, stock servo, grimracer 40x52/3 prop, 4600 NI-MH batteries, and stock motor. I'll be getting a radar gun soon but it seemed that it went slower. It definitely took longer to plane but is the possible lack of speed due to the 3 blade prop? Is a 2 blade prop better like the Octura x642?

Most common cause of the problems you mentioned, all other things being equal is a dead cell in one of your packs.

[Doby]

What brand name are your packs? Please don't say Venom.

[Blackjack-sven]

No way in hell are they venom. They are not that much better though, they are Dynamite Intellect 4600's. And they've only been used maybe 5 times all in all. I use an ICE charger to charge them and cause these two packs that are the only packs I have for the boat they do cool down properly before being charged again.

Most common cause of the problems you mentioned, all other things being equal is a dead cell in one of your packs.

Can't really see how a cell could be blown already. I ran the boat completely stock for 4 runs then switched to the grimracer prop for 1 run. Am I wrong?