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Author Topic: Futaba servos  (Read 2809 times)

funtimefrankie

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Futaba servos
« on: April 16, 2007, 07:24:07 pm »

I've just noticed I have two sorts, S3003 and S148.
What is the difference? Is one just an older model?
thanks
Frank
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OMK

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Re: Futaba servos
« Reply #1 on: April 16, 2007, 08:18:09 pm »

Nope. What you've got there are two identically-sized servos, but the innards are different. One has slightly differing gearings. Different motors too. One is faster than t'other with slightly more torgue per given cm/oz.
Apart from that they're pretty much the same. In reality you probably wouldn't tell difference if your rudder is bolted to the '148 or the '3003.
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Ghost in the shell

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Re: Futaba servos
« Reply #2 on: April 16, 2007, 11:09:31 pm »

just dont do what I did, shove a S3003 onto a sail of a yacht, that killed it!
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FullLeatherJacket

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Re: Futaba servos
« Reply #3 on: April 16, 2007, 11:34:53 pm »

just dont do what I did, shove a S3003 onto a sail of a yacht, that killed it!
Mark
Yeah - that'd do it.  We don't need Wes from Canada to sort out this one.  Just go quietly, huh? 8)
FLJ
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OMK

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Re: Futaba servos
« Reply #4 on: April 17, 2007, 12:31:09 am »

Take heed, Frank. The power of wind against sail creates enough forces that can rip the gearings to bits in no time. When I hinted on the '148 and '3003s being pretty much the same-for-same, they do have their limitations. Fine for everyday howdy-doody boats, but sailboats need a servo with more oomph.
When it's broken, don't bin it - give me a holler.
Same goes for you too, Ghost. Don't bin your mashed or battered servos. When you've collected enough, and they're just clogging-up the bench, bung 'em in a bag and send this way. I'll trade greenbacks, whatever.

Psssss....
Pass it on.
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tigertiger

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Re: Futaba servos
« Reply #5 on: April 17, 2007, 05:41:24 am »

Dear Funtime

I use this site to compare servo data.
http://www.alshobbies.com/shop/cat.php?id=1&Desc=

They also do deals, I think they do a multi deal on the s148.
No connection justa a happy customer.


If you are looking at sails then you need either a sail arm servo or a sail winch servo. They are listed as such.

The data below was pulled from this site.
As PMK points out these are 'bog standard' servos.

S3003
Standard size economy servo for general applications.
Ideal for use with cars, power boats, yachts, electric and engine powered aircraft and helicopters.
Specifications
Dimensions:
 40.4 x 19.8 x 36mm 
Speed:
 0.23 sec/60dg 
Torque:
 3.2 Kg/cm 
Weight:
 37.2g 


S148
One of the most popular general purpose servos, it's reputation is second to none.
Ideal for use with cars, power boats, yachts, electric and engine powered aircraft and helicopters.
Specifications
Dimensions:
 40.4 x 19.8 x 36mm 
Speed @ 4.8v:
 0.22 Sec/60dg 
Speed @ 6.0v:
 0.19 sec/60dg 
Torque @ 4.8v:
 3.0 Kg/cm 
Torque @ 6.0v:
 4.1 kg-cm 
Weight:
 44.4g 
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funtimefrankie

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Re: Futaba servos
« Reply #6 on: April 17, 2007, 07:26:11 pm »

Thanks for the info, I'm not into sail boats...so that's OK   :) :)
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Ghost in the shell

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Re: Futaba servos
« Reply #7 on: April 18, 2007, 06:44:15 pm »

frankie I killed not 1 S3003 but 4 on my Uni club boat, 2 were water damaged, (sail/rudder) the other 2 were gear strips
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malcolmfrary

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Re: Futaba servos
« Reply #8 on: April 18, 2007, 10:07:30 pm »

Hi Ghost
Using a standard servo for sail control on anything more than 100 sq in is a recipe for problems.  Unless you use it to operate switches to work a winchmotor.  At the very least you need metal gears, and then you need to keep the water out.
Standard servos work great for rudders, though.
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