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Old Nov 16, 2005, 10:30 AM
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Building a Flower

Hi All,
Static Boat Model Builder doing a Scale RC Boat.

I have a Mabuchi Motor (measures 1-1/2" X 1" Dia.), and plan to run it w/ 7.2V Battery Packs in parallel, or a 6V Battery...not sure which is best for long run time, easy charging, etc...Hum, I have more questions.

So which ESC w/ Reverse do I use?

I don't want to fry the ESC or Motor.
Thanks for the Help,
bill II
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Last edited by bill II; Nov 25, 2005 at 08:25 AM. Reason: Changed Title
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Old Nov 16, 2005, 11:15 AM
"Old 8140"
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Arizona Via NH
Joined Mar 2005
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I have used the Futaba - 20+ turns with sucess.

http://www2.towerhobbies.com/cgi-bin...?&I=LXUY13&P=0


Jim
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Old Nov 16, 2005, 11:27 AM
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Quote:
Originally Posted by Old 8140
I have used the Futaba - 20+ turns with sucess.

http://www2.towerhobbies.com/cgi-bin...?&I=LXUY13&P=0


Jim
Hi Jim,
Thanks for posting.
I was looking at Tower...lots of choices there.

Futaba MC230CR ESC w/Reverse 20+T
Operates motors that are 20 turns up to 27 turns (Stock Motors).

Wonder how many turns my little Mabuchi motor is?
Regards,
bill II
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Old Nov 16, 2005, 11:32 AM
Useful Idiot
Asturias, Spain
Joined Mar 2001
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Unless it's got some macho name labelled on the can and has exposed brushes' it's unlikely to be outside your range. It's probably a bog standard 540.
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Old Nov 16, 2005, 11:53 AM
Veni, Vidi, Feci
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Take a look at the Hitec EZX-R at Tower... less $$, works fine. You want to avoid race car ESC's that have odd reverse action- many require a stab of the "brake" (reverse), then release, then reverse again before ESC's reverse actuates.
Others actually time out reverse after a few seconds to protect hot "timed" motors. EZX-R has plenty of amp capacity, simple reverse, and it's cheap.

Pat M
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Old Nov 16, 2005, 11:58 AM
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Quote:
Originally Posted by martin richards
Unless it's got some macho name labelled on the can and has exposed brushes' it's unlikely to be outside your range. It's probably a bog standard 540.
Hi Martin,
Thanks for Posting.

My Mabuchi motor measures 1-1/2" X 1" Diameter.

I have a Mabuchi 540S in box (which is why I know what that one is- lol)...it measures 2" X 1-3/8" Diameter...lots bigger and heavier.
It's much more Motor than I need for scale speeds on my model.

I'd like to use the little Mabuchi, matched w/ appropriate ESC w/ reverse.

These are older motors...back a few years, as I understand, they were popular motors, perhaps no longer so.

Cheers,
bill II
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Old Nov 16, 2005, 12:11 PM
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Quote:
Originally Posted by patmat2350
Take a look at the Hitec EZX-R at Tower... less $$, works fine. You want to avoid race car ESC's that have odd reverse action- many require a stab of the "brake" (reverse), then release, then reverse again before ESC's reverse actuates.
Others actually time out reverse after a few seconds to protect hot "timed" motors. EZX-R has plenty of amp capacity, simple reverse, and it's cheap.

Pat M
Hi Pat,
Thanks for the Reply.

I like the price.

What does Motor Limit: 23 Turn mean?...Motor has to be 23 turns are greater...no top limit on the turns it can have?

I take it my little motor has a lot of turns?

Cheers,
bill II
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Old Nov 16, 2005, 01:13 PM
Veni, Vidi, Feci
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Motor power (and current draw) are governed by how many turns of wire go around each armature pole... fewer turns of fatter wire offers lower resistance, thus more amps flow, generating more torque. Many turns of finer wire do the opposite. You can have two identically sized motors with entirely different characteristics, depending on design.
And it makes a big difference going from, say, 27 turns of 20 gage wire to 25 turns of 18 gage.

Pat M
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Old Nov 16, 2005, 03:24 PM
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Quote:
Originally Posted by patmat2350
Motor power (and current draw) are governed by how many turns of wire go around each armature pole... fewer turns of fatter wire offers lower resistance, thus more amps flow, generating more torque. Many turns of finer wire do the opposite. You can have two identically sized motors with entirely different characteristics, depending on design.
And it makes a big difference going from, say, 27 turns of 20 gage wire to 25 turns of 18 gage.

Pat M
Hi Pat,
Well ok, now we're getting somewhere.

My little motor has 3 sets of "fine" wire turned around each...not sure how many turns though.

High resistance-low amp flow-low torque motor here.

So, is the Hitec EZX-R is safe to use w/ this puppy?
Thanks,
bill II
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Old Nov 16, 2005, 03:46 PM
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Asturias, Spain
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Woops sorry, 1 1/2" x 1 1/8" is a 400 size but triple wound sounds very strange (it lowers resistance even more than using 1 strand of wire 3 times the section) however, the number of turns relates to the number of times the wire(s) are wound round each pole of the armature.
Anyway from your description it looks like http://www.mabuchi-motor.co.jp/cgi-b...AT_ID=rk_370sd or many other similar types of the same dimaensions.
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Old Nov 16, 2005, 05:37 PM
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Quote:
Originally Posted by martin richards
Woops sorry, 1 1/2" x 1 1/8" is a 400 size but triple wound sounds very strange (it lowers resistance even more than using 1 strand of wire 3 times the section) however, the number of turns relates to the number of times the wire(s) are wound round each pole of the armature.
Anyway from your description it looks like http://www.mabuchi-motor.co.jp/cgi-b...AT_ID=rk_370sd or many other similar types of the same dimaensions.
Hi Martin,
Thanks...I think you're in the ballpark...I leaning towards an old 380.

Small Print says Mabuchi...so a least that's right.

The wire end is black plastic w/ 8 wagon wheel like spokes.

At anyrate...I'm just trying to get an idea of what's a safe ESC to put w/ it.
Cheers,
bill II
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Old Nov 16, 2005, 08:51 PM
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Central Missouri,USA Along the banks of the Missouri River
Joined Jun 2005
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Hi Bill II

I suppose your the Bill II from Steel Navy forum?Hello there.Predreadnoughts rule!!!What kind of ship/boat are you trying to power?What size/scale is it?I just recently purchased a Proboat Classic Runabout,which is a 29in.boat.Well it has a 550 or 540 size motor and I use a 1700mah 7.2v battery.The boat came with a speed control that was forward only, so I swapped it with a Proboat esc. with reverse.It is waterproof and has been very reliable so far.I cant remember the model number though.Bye.

Tim
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Old Nov 16, 2005, 10:39 PM
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Hi Tim,
So this is where you went...when you gonna start back building warships again?

It's a 1/72 Matchbox Corvette, something quick & easy...all my other projects are taking to long...I need to get something in the water, before I go into withdrawls...you know.

It's hard not tweaking it out...it won't be pretty built out of the box, but hey, it'll float!

For my ESC, I think I'll go w/ the Hitec EZX-R.
My motor already has capacitors on it, so think I'm OK.

Guess I better get started on it.

Pre-dreads rule my friend!
All the Best,
bill II
(Dream Model- 1/100 Good Hope)
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Old Nov 17, 2005, 03:58 AM
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Kitchener Ontario Canada
Joined Jan 2005
77 Posts
Hi
Sound's like you've got a 380 motor.
As to the ESC check out this web page it has exactly the info your looking for.
http://members.shaw.ca/modelflags/tips/flower.html
Bob
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Old Nov 17, 2005, 09:20 AM
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Quote:
Originally Posted by Bobslr
Hi
Sound's like you've got a 380 motor.
As to the ESC check out this web page it has exactly the info your looking for.
http://members.shaw.ca/modelflags/tips/flower.html
Bob
Hi Bob,
Thanks for posting
I've got it already...great article.
Prob is, I can't find the Hitec/RCD SP-610RF mentioned in the article.
Hoping the Hitec EZX-R is the newer improved version.
I think it's worth a try.

I'll let everyone know if my boat blows up.
Cheers,
bill II
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