BL to replace Brushed.

[Simon.O.]

I now have my eyes on BL and maybe Lipo.
For now here is my kick-off.
I can get a good esc for very little $ and this motor is very attractive.

http://www.rcnz.com/Shop/Service/Detail/Product/1750/Electric_Motors___Brushless/RCNZ___540_Brushless_Motor___In_runner_Short.html

Now I know is it smaller than a Fiego 540 S but to me power is power.
This motor will produce up to 390W of power.
At present I am running superstock motors that will may produce 175+W of power.
Given that the BL motor will out power the brushed by 2 x and there are no brushes to replace and comms to machine.

Would THIS motor be an improvement over a SS brushed can.

[ozzie-crawl]

what boat is it going in. did you realize for the same or less money you can buy a fiego right here on OSE plus you need a water jacket that you can get at the same place. also what batteries are you going to run because that motor is 4000kv. have a look in the tips thread to see what would be suitable for your hull/batteries etc. if you are unsure just ask someone here will steer you in the right direction

[Simon.O.]

I am considering this motor for my rigger.
I am looking for a replacement for the brushed cans that I currently use.
I am well aware of what Steve sells here, and have bought from him before but sometimes shipping costs can be an issue.
What I am looking for is an opinion as to whether a 390 Watt bl motor would be a suitable upgrade to a Tamiya Superstock 23t(190 Watt) brushed can.
I AM keen to go BL and indeed one day go Lipo.
I like to do a LOT of homework and then make a choice.

[ozzie-crawl]

a lot would depened on size of rigger and batterie choice. if you are going to use around 6 cell nmh or 2s lipo it would be okay. i have played with a few 380 size motors (mainly long can) and from my experiances they would be far superior than the 23 turn brushed motors.

[j.m.]

You might want to try and order from here:

http://www.hobbycity.com/hobbycity/store/uh_index.asp

They are right up north from you.

Here's a good motor to take a look at:
http://www.hobbycity.com/hobbycity/s...tor_(5mm_Shaft)

Thay also have a HUGE selection of lipo's and chargers.

[egneg]

I am waiting for a balancer that I ordered from hobby city as I picked up a couple of 2s1p lipo's.
I like the prices and shipping to the US was very reasonable.

[j.m.]

It's FAST, too.

[Simon.O.]

To power a rigger similar in size to a predator.
I will only buy locally or from OSE here.

The Feigao 540 S motor is now very attractive.
Given that I currently run 6 cell IB 4200 and am looking at at 2S1P 3300 or 4000 20C-25C Burst Lipos, I am curious as to what kv would suit.

10S 3549kv = 25900 rpm
8S 4436kv = 32000 rpm

This will spin a 431 or 531 prop.
If I get really excited I will spin a 534 prop.

I could go for the 7S or 6S and get some really insane rpm but I do not think my wires will hold that.

I want to move from the brushed cans and go BL, with a performance increase.
Not wild but noticeable.

[j.m.]

You could go for the 540 7L with a 632. A little less rpm, but more power.

[Dr. Jet]

10S 3549kv = 25900 rpm
8S 4436kv = 32000 rpm

10S = 37 volts x 3549 rpm/V = 131,313 rpm.

That motor should work well with 2S (or maybe even 3S) in your rigger. Try an X432 on 2S for starters, then go to an X632 if temps are good.

[Simon.O.]

10S = 37 volts x 3549 rpm/V = 131,313 rpm.

That motor should work well with 2S (or maybe even 3S) in your rigger. Try an X432 on 2S for starters, then go to an X632 if temps are good.

oooops!
When I typed 10S that is the motor model number not pack size.
I will use 6 cells Nimh until I get a 2S lipo.

What I am after is do I go for 25900 rpm or 32000 rpm on a 431 or 531 prop.

[Dr. Jet]

I've used a Lehner Basic 5300 in a rigger of similar size to yours on 6 NiMh cells. The Lehner motors are about equivalent to the "S" can motors you mention, and my response is based on that. You may want to go with a Kv of close to 5000 rpm/V for 6-cells.

I ran my rigger with props as big as an X632 (D/T) and as small as an X427 (D/T). Speeds were not a whole lot different between the various props, but the bigger props had better acceleration, less cavitation, and much more heat (but within limits with cooling). I figure amp draws were arounf 70~80 amps or more with the X632.

[Simon.O.]

I have just come back from the lake .
I am now convinced that these small brushed motors are the cause of many of my woes.

My small motors 540 23t brushed are arcing like a welder at the moment and I am not sure I am keen to put new brushes in again.
I will cut the comm and bed the brushes one last time and then it is BL for me.

I am leaning towards the 540-10S to give me about the same theoretical shaft rpm as I have now.
Given that the BL motor is a LOT more efficient I should see more power at the prop that I have now.

[egneg]

Bl will make a huge difference - but lipo's are needed to make them fly.

[Simon.O.]

Bl will make a huge difference - but lipo's are needed to make them fly.

I am very quickly realising that BL PLUS lipo is the way for me to go, at the moment I will have to kick off with a BL motor+esc and then later will go Lipo

While I am narrowing my choices is there any reason why I should go for a 540S over the long can 380L

I am very keen to stay with a 1/8" shaft for my current applications.

I am REALLY REALLY hoping that BL will be the end of my boats hicuping all the time.