whats the smallest readily available servo - RC Groups
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Mar 19, 2002, 09:22 PM
"Bible Thumper"
AMTJIM's Avatar

whats the smallest readily available servo

Is the smallest servo available still the hs55 size?
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Mar 19, 2002, 10:59 PM
Registered User
ScottS's Avatar
The HS-50 is smaller. The indoor stuff like WES-Technik is even smaller still. Check out http://www.toddsmodels.com/servo.htm
Mar 20, 2002, 01:07 AM
Will work for planes
omega blood's Avatar
CS-10 molecular servo. available through http://www.hobbypeople.net/
Mar 20, 2002, 07:45 AM
Registered User
Bill Glover's Avatar
I think the GWS Pico servo is smaller & lighter than an HS50, don't have the figures to hand though.

I use the GWSs (with JST connectors) for indoor models and HS50s for small outdoor models (S280 etc).
Mar 20, 2002, 08:22 AM
Old Desert Rat
Arizona Chuck's Avatar
I like the GWS Pico servos. You get more arms and extra screws. The screw that holds the arms on goes in easy, the HS's go in hard, not good for wimpy models. I hard wired a GWS receiver and two Pico servos together in a brick and got the weight down to 14 grams total. The three pieces weighted 19 grams before I started. Now I can add a retract servo and have the same weight in the plane.
Mar 20, 2002, 08:44 AM
Registered User
Jamara Bit servos 5gm at www.eam.net
Mar 20, 2002, 09:31 AM
Registered User
E-Challenged's Avatar

Tiny servo

Heard a rumor that GWS is coming out with a new tiny servo, probably similar to the expensive German linear outout servos.
Mar 21, 2002, 06:23 PM
Registered User
The FMA Direct PS 30 is the smallest and lightest available with the exception of the Westek. PS 30 also uses a full size output shaft that accepts other manufacurers output arms. Finally, it has twisted, self-shielding cable that is highly flexible and has 65 starnds of #44 wire.
Mar 21, 2002, 07:38 PM
Crash Master
Gene Bond's Avatar
Fred: The specs and picture of the PS30 remind me of the Expert SL110 that I picked up a while back on an emergency run to the LHS, and it was all they had. I can't complain about it, seems fine, except the leads were pretty short. Are these 'close relatives'?
Mar 21, 2002, 11:24 PM
ClearView Rocks!
Quacker's Avatar
Hi Fred. I'm a little lost. your specs claim .28oz but the GWS Pico and HS-50 both claim to be sigificantly lighter. Can you help?

Mar 22, 2002, 03:52 AM
Most Exalted Windbag
I've actually weighed the GWS Pico BB 101 and the HS-50. They each weigh 0.22 oz. as claimed. The HS-55 came in at 0.28 oz.

Maybe FMA is shooting themselves in the foot when they state 0.28 oz for the PS-30.

Mar 22, 2002, 04:04 AM
Registered User
Bill Glover's Avatar
The difference is maybe that the GWS is available with JST leads & connectors ... definitely lighter than standard connectors. All my GWS Picos are the JST lead ones, I use Multiplex Pico 3/4 Rxs for my indoor models but the GWS R4P is available with a JST block too.
Mar 22, 2002, 06:20 AM
Most Exalted Windbag
Nope. My 0.22 oz. 101s and HS-50s have regular (JR, HiTech etc.) plugs and leads. The JST would be even lighter.

I weighed them on a digital reloading scale that measures to 0.10 grain. One grain = around 1/15 of a gram.

Last edited by Red Baron 47; Mar 22, 2002 at 06:25 AM.
Mar 22, 2002, 06:54 AM
Registered User

AZ Chuck, Can you elaborate on your "BRICK"?

Dear AZ Chuck:
Can you explain and or post some pics on exactly how you fabricated the "Brick" configuration of 2 servos + receiver @14grams AUW?
Jon B. Shereshaw
Mar 22, 2002, 02:09 PM
Registered User
Bill Glover's Avatar
Originally posted by Red Baron 47
My 0.22 oz. 101s and HS-50s have regular (JR, HiTech etc.) plugs and leads. The JST would be even lighter.
OK, I use the Pico F STD which is a little lighter than the Pico BB. The quoted weights are 5.4g and 6.2g ... I assume the lighter weight is with the JST lead. The Pico BB is quoted as 5.7g / 6.5g. 6.5g is 0.229 oz, that's pretty close to what you measured with JR lead fitted.

So to come back to the original question of the thread, at 5.4g (0.19 oz) I think the Pico F with JST lead may well be the smallest & lightest mass-produced servo around.