Torque needed for a 450 size tail?

Rcplaneflyer15 · Apr 10, 2008, 01:50 PM

What is the recomended amount of torque for a tail servo to have on a 450 size heli?

Madbob9 · Apr 10, 2008, 05:07 PM

35 oz/in. or better

Rcplaneflyer15 · Apr 10, 2008, 07:05 PM

Are you sure about that? I have seen many people run digital servos with 20oz or less of torque and had great results. The reason I'm asking is I have a JR S185 servo that I was going to run on my Trex at 6v which will give it 13.1oz of torque with a speed of .06/sec.

Gino CP · Apr 10, 2008, 07:39 PM

Slap it on. If it is not adequate, put chinese weights on your tail. Did wonders for my tail.

jzanutto · Apr 10, 2008, 07:52 PM

I just put on a HS65HB, works great

mhills51 · Apr 10, 2008, 08:54 PM

You can get some great deals on the futaba 9650 It was the tail the pros used, but sence Futaba came out with new ones which some flyers don't see as a improvement

. It seems to be a great deal.

Rcplaneflyer15 · Apr 10, 2008, 11:11 PM

Quote:

Originally Posted by Gino CP

Slap it on. If it is not adequate, put chinese weights on your tail. Did wonders for my tail.

Do you know if these balls will work for the mod?

Madbob9 · Apr 10, 2008, 11:44 PM

Quote:

Originally Posted by Rcplaneflyer15

Are you sure about that? I have seen many people run digital servos with 20oz or less of torque and had great results. The reason I'm asking is I have a JR S185 servo that I was going to run on my Trex at 6v which will give it 13.1oz of torque with a speed of .06/sec.

Sure any fast servo will work but for how long.The tail servo takes a beating because it never gets a rest.You will be pushing a weak servo and they get hot.
It comes down to reliability and peace of mind.

mhills51 · Apr 11, 2008, 06:15 PM

tell me about it. I started with a old 80's high speed servo on my tail a futaba fp-s132h and after about 6 flights in HH it would spin to the left and when I took it off it would spin to the right. Thought the cheap gyro was to blame, but no it was the servo.

Gino CP · Apr 11, 2008, 07:42 PM

Yes, those Align balls will work. I suggest using the stock blade grip holes using a long 2mm bolt and nut.

Here's what I did using bearings and some Tamiya Mini 4WD screws and nuts.

missle · Apr 12, 2008, 07:08 PM

Don't know an exact number, but having used servos in the 17-30oz they ALL had their limits (especially with backwards flight in a head wind). You didn't mention what head speeds your running but if your using 325's with 9 or more deg pitch at > 2500rpm, then I'd really consider something a little stronger. Did you say 13.1 oz, heck that's less than the output of the new mini HS-55 digitals.

Apr 10, 2008, 01:50 PM	#1
Rcplaneflyer15 Registered User United States, SC, Rock Hill Joined May 2006 461 Posts	Torque needed for a 450 size tail? What is the recomended amount of torque for a tail servo to have on a 450 size heli?

Apr 10, 2008, 08:54 PM	#6
mhills51 Paycheck flyer kansas city Joined Feb 2007 9,162 Posts	You can get some great deals on the futaba 9650 It was the tail the pros used, but sence Futaba came out with new ones which some flyers don't see as a improvement . It seems to be a great deal.
	Latest blog entry: Logo build

Apr 11, 2008, 06:15 PM	#9
mhills51 Paycheck flyer kansas city Joined Feb 2007 9,162 Posts	tell me about it. I started with a old 80's high speed servo on my tail a futaba fp-s132h and after about 6 flights in HH it would spin to the left and when I took it off it would spin to the right. Thought the cheap gyro was to blame, but no it was the servo.
	Latest blog entry: Logo build

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Apr 10, 2008, 05:07 PM	#2
Madbob9 Registered User USA, CA, Moreno Valley Joined Nov 2006 552 Posts	35 oz/in. or better

Apr 10, 2008, 07:05 PM	#3
Rcplaneflyer15 Registered User United States, SC, Rock Hill Joined May 2006 461 Posts	Are you sure about that? I have seen many people run digital servos with 20oz or less of torque and had great results. The reason I'm asking is I have a JR S185 servo that I was going to run on my Trex at 6v which will give it 13.1oz of torque with a speed of .06/sec.

Apr 10, 2008, 07:39 PM	#4
Gino CP Team Mulikow Manila, Philippines Joined Oct 2006 9,565 Posts	Slap it on. If it is not adequate, put chinese weights on your tail. Did wonders for my tail.

Apr 10, 2008, 07:52 PM	#5
jzanutto Registered User Fresno, CA Joined May 2005 1,021 Posts	I just put on a HS65HB, works great

Apr 11, 2008, 07:42 PM	#10
Gino CP Team Mulikow Manila, Philippines Joined Oct 2006 9,565 Posts	Yes, those Align balls will work. I suggest using the stock blade grip holes using a long 2mm bolt and nut. Here's what I did using bearings and some Tamiya Mini 4WD screws and nuts.

Apr 12, 2008, 07:08 PM	#11
missle Registered User West Chester, Ohio Joined Nov 2006 1,382 Posts	Don't know an exact number, but having used servos in the 17-30oz they ALL had their limits (especially with backwards flight in a head wind). You didn't mention what head speeds your running but if your using 325's with 9 or more deg pitch at > 2500rpm, then I'd really consider something a little stronger. Did you say 13.1 oz, heck that's less than the output of the new mini HS-55 digitals.