Capt Jim

My Feedback: (168)

I have long been a user of Hitec HS645MG servos in my planes, but have recently become aware of a very similar performance in the Futaba S3305, and it appears to be available at a slightly reduced cost. There are some differences between the two. Before I make a purchase of a dozen of one of these servos,...which one do you use? Have you used both? Any failures or questionable performance issues? Lets hear from the users.
Thanks.

ramduster

My Feedback: (2)

The futaba S3305 is a good servo I have one in my jerry's big boy on the rudder with no problems.

Zeeb

My Feedback: (41)

I have the 645's in a 1/4 scale gasser I bought used. I have the 3305's in a Funtana 90 I put together.

Both seem to work okay, but I recently had to change one of the 645's on an aileron of the 1/4 scale due to excessive gear slop/centering issues. The 645's are well above the specs for the 1/4 scale and it has not been flown as much as the Funtana. The Funtana has much larger ailerons with a history of aileron flutter if the servos/linkages are not tight with the appropriate geometry. The 3305's on the Funtana have been working without a hitch so far and it's been flown quite a bit.

A lot of guys use the Hitecs, but I'm kind of a Futaba guy anyway and have only bought Hitecs for my foamies to this point.

Sort of a question about Ford, Chevy, or Dodge and which do you prefer I guess...

Ivo60

I have used the Futaba S-3305 servos in aircraft applications in 2 different planes now, without so much as a hicup! One is my 60 size ultra-stick with a Saito 1.00 four stroke. (i used them everywhere but the throttle) and use 6 volt nicad 1200mah pack. The second one is a Sig Mayhem 3-d arf kit with a Saito 1.20 size four stroke engine..... I used all s3305 as well. (except throttle) in this bird, I use a 2000 mah lipo 2cell which has 7.4 volt output which i use an MPI regulator down to 6 volts too. This bird has also preformed fabulously without a glitch and come to find out Futaba only recomends the use of these servos with NICAD batteries....... Anyone Know why????? Ive not had a problem, this is my 3rd season using the setup in the Mayhem??? Thanks in advance... S.G. in Rockford Il.

A.T.

Previous thread Futaba S-3305 - use NiCd not MiMH. Most NiMH have higher internal resistance and can not deliver current S-3005 requires to operate at listed specs under load, especially on 4.8v . If using NiMH, use a 5cell pack.
HS-645MG spec sheet

Regards
Alan T.
Alan's Hobby, Model & RC FAQ Web Links

rhd-RCU

My Feedback: (36)

Also from the Futaba website:Futaba recommends these for cars and boats.

A.T.

That typo is contradicted by their Greatplanes Performance Series Aircraft advertising.

regards
Alan T.

rhd-RCU

My Feedback: (36)

Futaba makes the servo, not Great Planes. Maybe GP has the typo.

zaskarkid

looking at these as well for aircraft use.

futaba servo chart shows 3305 for rc car use?

http://www.futaba-rc.com/servos/servochart.pdf