Mabuchi RS540SH motor question - RC Groups
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Mar 03, 2002, 12:30 PM
Plane hugging cat
Vonbaron's Avatar

Mabuchi RS540SH motor question

Stop laughing! Control yourselves for a second.

The LHS has them cheap. Metal backplate, internal capacitors, cheap and did I mention cheap?

Same old question. How many amps/cells can I push this can motor to? 18-20 as usual? Seems to run pretty good with 7 cells and a 7x4 around the 20 amp mark.

P.S. How many turns does this thing have? Other numbers on it are TD029X08
Last edited by Vonbaron; Mar 03, 2002 at 12:33 PM.
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Mar 03, 2002, 01:05 PM
Registered User


try this:

seach on product
chang the to the model RS
and input the number 540
it will give you the specs.
Mar 03, 2002, 01:15 PM
Always looking UP
FANMAN's Avatar

Re: Mabuchi RS540SH motor question

Can they beat $6.00 each?
Mar 03, 2002, 01:30 PM
Plane hugging cat
Vonbaron's Avatar
Thanks for the link D.FLinn. Found the motor. Unfortunately those specs don't translate very well in my brain.

Fanman, that's about what they cost. Double that though for Australian dollars.

I was just wondering if anyone uses these things anymore in planes. They obviously arn't super motors but for casual flying I thought maybe..

How would the 540SH compare to a Magnetic Mayhem direct drive? I know they won't like quite as many amps but at the 18-20 amp mark maybe?

Now what would happen if I pushed one to 25A? Would I release the smoke?
Last edited by Vonbaron; Mar 03, 2002 at 01:34 PM.
Mar 03, 2002, 01:58 PM
Always looking UP
FANMAN's Avatar

Motor and specs

I use them alot, very similar to the stock Kyosho EP Cessna motor, which is direct drive. I am getting ready to use the motor with an MPJet 3.8:1 gear drive, on 7 cells. It says it turns 11K RPM@6v, should be just fine....
Mar 03, 2002, 08:56 PM
Registered User

I use them!


I use them any chance I get to buy a new one. As you have said they are cheap. The numbers are really screwy. The specs posted on the website are for the stock motors, but they mainly do custom-to-spec runs so I'm told when I contacted them for Eng. Samples. I have 5-6 SP600 SP500 motors and none of the numbers are posted on the website. I bouhgt them all in the bargin bin at various hobby shops. No I must say have have a few duds that eat current adn require 10 cells or better to run well. I also have a few winners that I wish I could get more of.

1: RS555PH 7220 this one runs well on 8 cells 800AR and will turn a 8x4 grupener speed prop @ 13900rmp for 4.30 min WOT, great
for my FMA razor, weight is not bad @ 191 grams.

2: this one I really don't know what it is the case is chrome and is marked RP545 - 700231 Plastic end bell and light @ 155 grams
It won't trun the bigger props very fast but the smaller ones (5.5 and 6.5 in) @ 15500 rpm. It's real claim to fame is the run time. I put it in my razor and the same 8x800AR packs and the 8x4 prop.
It only would spin at 12500rpm but the fihgt was 12min WOt from the time it left my hand until the time I landed this is a very nice little motor.

I have a few others that are not bad but these two stand out. I say buy a few different ones and test them you may get a winner for $5. I think I have about $25.00 Can. ( about $ 2 US ;-) ) in the lot.

Have fun with them they are cheap and some run very well.
Mar 04, 2002, 09:29 AM
Plane hugging cat
Vonbaron's Avatar
Thanks for that guys. Looks like they may be of use in something after all.
Mar 04, 2002, 10:31 AM
Son of Jet Jockey
Will Chapman's Avatar

How about $3.50?

How does $3.50 for an RS540SH (no caps) sound?
Mar 04, 2002, 11:58 AM
Registered User
Van's Avatar
Allelectronics is a great store. I usem them quite a bit for all sorts of projects.
Mar 04, 2002, 12:04 PM
Plane hugging cat
Vonbaron's Avatar
Or even $2.50 if you get 90 or more. Not quite sure what I'd do with 90 of em. Thinking of a really big multi engine aircraft...
Mar 05, 2002, 01:23 PM
Registered User
Ben74's Avatar
well hey, if they're that cheap, hook up a whattmeter and see how much those puppys can take!