HS-5955TG Vs. JR 8711

[PilotCK]

I am adding these to a EF Yak 88" on all controll surfaces. I would like to keep the cost down; however I like the JR servos. I have used the 8717 in my Heli.What are most people using in 30% airplanes, HiTec or JR? The torque is a bit more on the JR servo's but will this be over powered for this plane or the 5955 be sufficent?

[Surly_Schmidt]

I have 5955s on my 30% and they are plenty strong enough. 2" servo horns, 1 1/2" surface horns. 133% overdriven on high volts make for very quick surface deflection.

[MrKiwi]

I say go for the 5955's, they are cheaper have titanium gears, and will do the job with no problems at all. The 8711 will suck up all the battery juice and are not needed on a 50cc plane. Think about it, people use 1 8711 for the rudder on 35%. It's over kill for a 50cc plane(.







(People don't start brand wars)

[PilotCK]

I figured the 8711 would be a bit overkill. I assume the Hitec can handle 6v?

[jongurley]

I personally like hitecs alot,, the 5955's (now 7955's), develop no slop at all,,

[PilotCK]

Anyone using Futaba's by the way? If so which ones?

[lastresort]

I have 5955's in my 88" yak and 88" extra. They are plenty. I'd say your golden with that setup. I've heard of guys using less servo with no issues.

[JEFFRO503]

	Quote: Originally Posted by Pilotck
	I figured the 8711 would be a bit overkill. I assume the Hitec can handle 6v?

Some others may correct me on this , but i think they can handle up to 8.4 V! I know a lot of guys that have ran them for a year or two at 7.4V unregulated with no problems. I run mine at about 6 - 6.6 V....very powerful and very responsive! At about 100 flights on 3 different airplanes , and still no slop , and still work brand new. You'll notice that the first hour or so , they feel a little "notchy" because the gear train is extremely tight , but after a while , they break in and run smooth as silk.

[statbeast]

I run all my Hitec servos as 6v and they are great. Much better deal than the JR servos.

[66stang]

I love my Hitec's 5955 & 7955's JR's gear slop drove me to hitec~!

[PilotCK]

Thanks guys, much appreciated!

[dbcaster]

Hitecs are great for lack of gear slope. However, for fun some time try holding your control surface with the stick at nuetral. Then deflect the surface and see how easy it is to stall the servo moving off of center. Then try the same thing with an 8711 or a 9156. It will become very clear which servos have more torque.

[Mike Mayberry]

	Quote: Originally Posted by dbcaster
	Hitecs are great for lack of gear slope. However, for fun some time try holding your control surface with the stick at nuetral. Then deflect the surface and see how easy it is to stall the servo moving off of center. Then try the same thing with an 8711 or a 9156. It will become very clear which servos have more torque.

Hitec has never claimed to have similar torque to the 8711 (at least not yet ) However, note that the new 7955TG offers more usable torque than the 5955TG due to the new motor even though the specs are the same. This has been confirmed on this forum.

Mike.

[Tired Old Man]

Initially, the JR and Futaba servos are the better products. However, after an unspecified number of flights, but generally well less than 100, it becomes evident that the Futaba and Hitec higher end products would have been the better purchase choice. Those two don't wear out quickly. There's too much evidence of JR gear wear to be discounted.

Unless you're an advanced or unlimited IMAC flyer, which is doubtful in 50cc class planes, you probably won't ever need all that the 5955 and up servos can provide, especially if you set the plane and servo geometries up correctly.

In the 35% class, most people have by then doubled up servos on all the surfaces except the elevators. Unless the plane is in a knife edge loop where pull out loads at the bottom of the loop are extreme you will be unlikely to need all the servo power that is available. The vast majority of the high deflection loading is done at lower speeds to prevent flight surface and wing tube damage so flight loads aren't as much as most people think. Those that are flying their craft faster that they should be at full 3D surface deflections may see some blow back but their planes won't last all that long regardless of what servo they use.

Larger than 37% most people go whole hog since it's a class that demands the best in both equipment and operator performance. At that level people are willing to replace components as needed to stay on top of the competition.

[dbcaster]

Given the fact that the thread topic was 5955 vs. 8711. I figured the torque difference is important. On the other hand, this topic has been beaten to death. The ultimate servo would be an 8711 with a 5955 gear train. Given the great service I have received from Horizon, and not so good service from Hitec. My choice is power over gear wear.