Which servo in a 60" Ryan? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 08-10-2004, 08:41 PM   #1
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Which servo in a 60" Ryan?

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I've read several different recommendations for servos to be used in the 1.20 Ryan STA-M---as I'm using the hitec brand those are the sizes I'll refer to; it says 6 standard (425's) servos (which are around 50 oz torqe). I can only figure out that 5 servos (of any kind) are needed (two for 'rons), not 6. Then in another area is says to use 80 oz servos (which are twice the price of the 50 oz).

The primary reason I'm asking is that I'm using the 50 oz ones (425's) in my super chip (same size plane) with no problems (and obviously don't want to spend the money if its not needed)

Is it just a power factor-->more torqe = more authority? Are the 80's really needed?
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Old 08-11-2004, 04:03 PM   #2
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Old 08-12-2004, 03:22 AM   #3
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Hi ; I count 6 servos if you have ; 2 aileron , 2 elev , 1 rudder , 1 throttle.

I am not familiar with that Ryan type but if it is the same size as your Super Chipmunk and in the same speed range and weight ; the 50oz servos should work for you.

Having said that , I would recommend following the plans .

I usually like to put in bigger servos than the plans say because I like to throw my planes around.

It all depends on what style of flying you want to do.

Hopefully someone who has experience with the exact type can help you out.
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Old 08-12-2004, 08:50 AM   #4
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Depending on how you fly as well but I prefer stronger servo in the rudder when I use Pull Pull. With 2 servos on the elevator you probably won't need a whole lot of extra. Standards on the ailerons; again depending as well on flying style, shouldn't be an issue.

Only as a personal preference with a .60 size I prefer to upgrade some of the servos.

The Ryan is a great looking plane
Bob D.
Ajax RC Club
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Member of MAAC since I joined

Lighten Up, Life is waaaaaayyyy too short
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Old 08-12-2004, 09:38 AM   #5
Gary Maker
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I am presently flying a Midwest Giles 202 which is 27% scale at 72" span.

Believe it or not the manual only recommends standard type servos (43 in oz) all the way around exceipt for the rudder where it says to use 60 in oz of torque. That being the case I would feel comfortable using at least standard servos with ball bearings which the 425's have! Because I fly IMAC (precision competition aerobatics), I opted to use standard digitals for their holding power and precision!

I have an older Ryan STA made by Sig and unless your planning on doing wild 3D I would think the 425's are a good choice for this plane. Because the rudder shares the stearing, I would definitely use a more powerful servo on the rudder, probably a 525 or a 605.

If your nervous or worrying about the servos not having enough torque then by all means use higher torque servos for your own peace of mind. Dave Patrick says in his manuals for his series of planes that "there is no such thing as too much servo. Buy the best your budget allows"!

The Ryan is a beautiful scale plane and not designed for 3D anyway. Flying it scale-like, the recommended servos are very adaquate!

Why spend the extra bucks if not absolutely necessary for either the plane or your budget??
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Old 08-12-2004, 03:00 PM   #6
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All good stuff. I didn't read the rec's all the way through. Spacecowboy has it right at 6 (I missed two on the elevator).

What I may end up doing is getting 605's all the way round and then if I find I don't really need them, I'll switch them out into the corsair.
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