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HelicopterJR Heli Vibe 90/50, Sylphide 90, GSR260 › Best Throttle servo with the ATG?
07-13-2008 09:06 AM  9 years agoPost 1
John Zoratti

rrNovice

Palembang, South Sumatra, Indonesia

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All comments welcome. I have heard different recomendations on this subject!

I am planning on 8915's for cycilic, Looks like a 9256 for Tail. Will be using the 10 amp scott ray regulator, ATG, Solid G, MP5, carb smart, and YS50. Of course Raddix SB's!

Take off's are always optional, but landings are MANDITORY!

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07-13-2008 11:38 AM  9 years agoPost 2
Pinecone

rrKey Veteran

Maryalnd

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Of course you could go to a MultiGov Pro and it will replace the ATG and the CarbSMart.

But I am trying to decide between going with an HS-81 or a JR DS3517 for the throttle servo.

While reasonably fast is good, the motor will only respond so fast, so a faster servo cold actually be trouble. And there is very light load and in most instances the servo is traveling through well less than full travel.

Terry
Blade CP Trex 450 SE
QJ EP8v2 EX Gaui Hurricane 550
Vibe 50 Bergen Intrepid Gasser

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07-13-2008 12:19 PM  9 years agoPost 3
John Zoratti

rrNovice

Palembang, South Sumatra, Indonesia

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To be honest, I dont like multi-function devices, like Align 2 in 1 or the multi gov pro. I prefer 1 item controling 1 function. But thats just my preferance.

Take off's are always optional, but landings are MANDITORY!

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07-13-2008 12:28 PM  9 years agoPost 4
BarracudaHockey

rrMaster

Jacksonville FL

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Get used to it, I think you're going to see more and more of it.

A super fast servo isnt trouble, but it doesn't do much good to go faster than .15 to .12 and honestly anything in the .2 works pretty darn good.

Andy
AMA 77227
http://www.jaxrc.com

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07-13-2008 01:29 PM  9 years agoPost 5
helirulz

rrVeteran

Singapore

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Hey John!
Nice to see that you're going to get the Solid G! I love mine btw!
However you might wanna take a look at the 8900G instead of the 9256 and try to get them from Rotor Hobby. It was about 130SGD back in December so without hesitation, i bought one to keep as a spare to replace my 9254 when it finally dies on me. If Rotor is still selling them at this price, I'd get them if i were you.

As for the throttle servo, im using a Hitec 6975HB myself. Plenty fast for me. I dont see any need to get those blazing fast rurdder servos like the 9254. Im sure they wouldn't last as long 6975 and neither would they take a 6V setup without getting fried

Jeremy

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07-13-2008 02:43 PM  9 years agoPost 6
John Zoratti

rrNovice

Palembang, South Sumatra, Indonesia

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Hey Jeremy,
Have not seen you in a couple of weeks. Hope all has been good.
My friend in Indonesia had his 8900 lock up during a pyro. He said other people have had the same problem. He changed to a 9254 and has had very good luck. My 9256 has been good with my 611 for almost 200 flights and has a heatsink.

But thanks for the tip on the hitec for throttle. I forgot about the voltage as I will be running 6 volts!

Take off's are always optional, but landings are MANDITORY!

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07-13-2008 06:36 PM  9 years agoPost 7
inkspot1967

rrProfessor

Cranston Ri

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run a 9452 on throttle or if you want something lighter use a 3155 both work great and i have used them both on the ATG

on a side note i have been running a 8900 servo and never had a problem with it.

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09-05-2008 06:34 PM  9 years agoPost 8
T.Huhtamäki

rrNovice

Raahe-Finland

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I didn't want to start new thread so I ask here: What is the difference on ATG with normal servo mode and digital servo mode? Should I be using digital mode with Futaba 9252 servo?

Timo Huhtamäki

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09-05-2008 07:11 PM  9 years agoPost 9
u77171

rrApprentice

NY - USA

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yes, the 9252 is a digital servo.

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09-05-2008 10:12 PM  9 years agoPost 10
T.Huhtamäki

rrNovice

Raahe-Finland

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Ok. Now, can anyone tell me the difference between the standard and digital servo output on ATG?

Timo Huhtamäki

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09-05-2008 11:25 PM  9 years agoPost 11
BarracudaHockey

rrMaster

Jacksonville FL

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Sure.

A receiever updates the servo position at about 50hz, or 50 frames per second. A gyro in standard or analog servo does the same thing.

A gyro in DS, digital, super servo mode, whatever that particular gyro calls it updates the servo position at a much faster rate. The 401 runs at 270hz, some run up to 333hz depending on the servo and gyro.

The CSM RL's, the early versions of the Multigov, and the ATG do the same thing. Its interesting to note that Aerospire took the option out of their software because performance was the same. If you're running anything over 5.3v to the servo or so the high frame rate will just make it run hotter without appreciable performance gain.

Andy
AMA 77227
http://www.jaxrc.com

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09-05-2008 11:30 PM  9 years agoPost 12
tchavei

rrProfessor

Portugal

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about the throttle servo... like stated before fast isn't always the best.

as normal servo I would go with 9252 or 9452. For weight saving 3155 is very good. The HS65HB (not MG) is even lighter and performs just as well.

Tony


--------------------
"Perfection and patience usually walk side by side..."

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09-06-2008 03:05 AM  9 years agoPost 13
T.Huhtamäki

rrNovice

Raahe-Finland

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And here we go Futaba 9252 is NOT high framerate servo so I definitely should run the ATG on standard servo mode! Just as I thought!

Timo Huhtamäki

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09-06-2008 03:13 AM  9 years agoPost 14
BarracudaHockey

rrMaster

Jacksonville FL

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Actually most of the futaba digitals are high frame rate including the 9252

But running it in normal servo mode will be easier on the servo and cranking up the frame rate isn't going to get you much, if anything, performance wise.

Andy
AMA 77227
http://www.jaxrc.com

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09-06-2008 03:17 AM  9 years agoPost 15
tchavei

rrProfessor

Portugal

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50hz are 50 cycles per second (read as 50 updates per second). You're going to notice a difference with 300 updates per second? On the tail, yeah sure... on the throttle? No way.

My throttle servo lags behind my cyclic servos on the bench (9351 vs HS65HB no comparison) but in the air... full 60 degree range with entire head load against 4mm throttle movements with almost 0? Naaa

Tony


--------------------
"Perfection and patience usually walk side by side..."

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HelicopterJR Heli Vibe 90/50, Sylphide 90, GSR260 › Best Throttle servo with the ATG?
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