Hey guys,

I'm having a Jurrasic Jet ( http://www.altecare.com/jurassic.html ) built for me and I need to decide on what servos to use for the elevators. The problem is, the elevator servo pockets (in the stabs) are only 0.55" thick.

Probably the two best alternatives are:

Futaba S3150 Digital

Torque: 51.4 oz-in @ 4.8V
Dimensions: 1.1x0.5x0.8 in (28x13x19.7mm)

http://www2.towerhobbies.com/cgi-bin...&I=LXFLA0&P=SM


or

JR DS368BB Digital

Torque: 53 oz/in @ 4.8V
Dimensions (WxLxH): .50 x 1.12 x 1.21

http://www.horizonhobby.com/Products...odID=JRPS368BB


Also, there's the JR thin wing digital:

JR DS168 Digital Thin Wing

Torque: 47oz @ 4.8V ; 53oz @ 6.0V
Dimensions (WxLxH): 0.34 x 1.33 x 1.18 in

http://www.horizonhobby.com/Products...ProdID=JRPS168



Any thoughts on which is best or if these have enough torgue for the job? Any other alternatives I should consider?

Thanks!
Bob

Hi Bob,

You should also look at the Volz servos. They have similar size one that is really tough.

Hope this helps.

Adil

Adil,

Thanks for the suggestion. I used one of those on the AD F-16 I built for Scott Strimple. I had to track one down from Tad at Goldenwest and it was the last one he had. Do you know of a source for those here in the states?

I talked to a friend of mine who is a big-time glider guy and he said that they originally were popular but now most have gone back to the JR servos (like the ones above) for their high-torque, low-profile applications...

Bob

call dreamworks- he has raised servo covers/ with hump in them .
example, i was able to put 9411 jr in a bobcat where only 3421 or 3301 would previously fit

Hi Bob,

Unfortunately, the source I knew about is Tad at GWM as well. I'll try to see if I can find out if anyone else carries them. If you do get in a situation, I may have a couple used (like new) that I can send to you (no cost). If you can use them - great.

Regards,

Adil

My Jurassic is built from the original Jetmag drawings, and with careful placement I was able to fit Hitec 5245's. They are .67"thick.
They are mounted to .040" aluminum covers, and on one of the upper corners they touch the the outside fiberglassing.

Exept for breaking the gears on one of them in a belly landing, they have held up fine.
A small ventral fin would have saved the servo and elevator horns.

Lars

Hello Bob
Here is the link for the servos you need:
http://www.soaringusa.com/products/p...ategory_id=269

Address:
SoaringUSA.com
809 N. Glendora Ave
Covina, CA 91724

Phone: (626) 967-6660
Hours: 9:00am - 4:00pm, PST Monday - Friday

Email: [email protected]

regards
Peter

Peter,

Thanks very much for the information - great service as usual! I have a pair of the Voltz servos on order. I'll send you some pictures when we get it ready - hopefully by the end of June. Then it should be flying autonomously with our flight control system by the end of the summer...

Bob

ps. Adil, thanks very much for the kind offer. If it was just for me, I'd take you up on it, but this is for our NASA work, so I need to go with NIB.

Thanks guys!