gwolbrink

I have some old servos that I don't know any thing about. They are Cirrus indirect dirve ic servo CS-29R, Cirrus IC MS-ICR, Aero Sport IC MS-ICL (Looks just like the Cirrus servo). It looks like they have Dean's plugs on them. My first question is are they compatible with modern equipment? If so, what is the wiring diagram to wire it up for futaba. If anyone has any info on these servos, please let me know.

JohnBuckner

My Feedback: (1)

If they have four conductors on the leads then they are not compatable with any modern system. If three leads then they can work but centering and direction may be different. Futaba "J" plug as well as all the four majors now use a centerpin positive on the servo plugs.

John

gwolbrink

Thanks John,
They are 3 pin style. Anyone out there with a wiring diagram to convert to Futaba?

JohnBuckner

My Feedback: (1)

Its easy to splice on a Futaba 'J' plug but first what are the color or markings on the wire and is it flat ribbon wire?

The Positive will go to the centerpin of the 'J' plug
The signal will go to the side next to the plugs single spline
The negative will go on the opposite side.

JohnBuckner

My Feedback: (1)

DP

ZAGNUT

My Feedback: (1)

i'm still using a few of the ancient futaba made coreless cirrus servos, CS-28 i believe. the wires are a red, white and black twisted trio. red wire goes to the middle and they should work with all modern receivers except the black (non-Z) airtronics when wired this way.


dave

famousdave

My Feedback: (61)

Man you guys are brave.. that stuff wasn't very good even new.... with a decent standard servo costing $12 today why would one even bother with that old junk??

I just bought 10 new Hitech 425BB servos for $90... that's $9 each..!


I guess I can understand if you are in countries (other than USA or Asia) where r/c stuff is twice as much or hard to get..

DP

JohnBuckner

My Feedback: (1)

Heck actually I don,t think either Zagnut or myself are advocating the serious use of old junk servos but rather just providing an accurate answer to a serious question. Now to answer your question, I am not sure what your purchase of 10 servos has to do with it. My servo count on modern current servos hovers around 150 (over 40 for my pylon craft alone). I still have a much larger count dating back to 1957 and frequently find use for many such as the airplane I just flew this morning. It is a tailess with a stabilizer that is droppable in flight with a servo release from a servo sticking out the belly. There are a host of other such applications where an "Old Servo Stash" is indeed valuable. Heck I am still using an old escapement of mine with a wideband tone radio (legally on 27 MHz).

John

gwolbrink

They are as ZAGNUT says (3 twisted wires). I appreciate all of your help with the wiring info. It is nice to get some use out of these old servos. I plan on using one for a bomb bay door release. It is always fun fiddle around with some of the old stuff. Part of me just gets enjoyment out of making good use out of the old stuff. I don't plan on using these on critical controls so what the heck, I just saved a few bucks if I get them working.

famousdave

My Feedback: (61)

Hey John,

That's a lot of servos!!!

I understand you use too... I think the application you are using them for is fine.... I just see some of these guys put these older servos in expensive large scale planes to save a few $$...

DP