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HomeAircraftHelicopterRadio - Hitec Aurora › Hitec 7940TG vs. 7966HB vs. JR8717 Comparison
01-16-2009 10:22 PM  9 years agoPost 1
Kjarman

rrApprentice

noblesville, IN

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Hey guys,

I will be purchasing some new servos for my .50 size nitro bird within the month. I'm curious if you could weigh in with any thoughts, I'm not looking for an "I bought this so you should too thread", I'm looking for a constructive discussion based on the facts between the three.

I know that the 7940TG isn't due out yet, but RedZ06 has some good use on a set of these pre-production and I would appreciate his thoughts as well.

Hitec 7940TG Price:$134.99
Motor Type: Coreless
Bearing Type: Dual BB Titanium Gears
Speed: 0.09 x 0.07 sec @ 60 deg.
Torque: 150 / 182 oz./in. (4.8v/6v)
Size: 1.57" x 0.78" x 1.45"
Weight: 2.29oz 65.00g

Hitec 7966HB Price:$89.99
Motor Type: Coreless
Bearing Type: Karbonite Gear with Ball Bearing
Speed: 0.10 / 0.08 sec @ 60 deg.
Torque: 92 / 111 oz.in (4.8v/6v)
Size: 1.57" x 0.78" x 1.45"
Weight: 1.87oz 53.00g

JR DS8717 Price: $139.99
Type: Digital
Torque:160 oz/in @ 4.8V; 196 oz/in @ 6V
Speed:.09 sec/60° @ 4.8V, .07 sec/60° @ 6V
Dimensions (WxLxH):.83" x 1.59" x 1.57"
Weight:2.36 oz
Gear Type:Metal

My thoughts are, when you compare these three for a .50 size bird the 7966HB comes out on top. Less weight, very comparable speed and Karbonite Gears and $50.00 less per servo.

I sold another one to Terrafirma...... wife wants to know where the money's at!!!!

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01-16-2009 10:33 PM  9 years agoPost 2
bmapope

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TN

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did you look at the ds610's and ds620's from align?

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01-16-2009 10:36 PM  9 years agoPost 3
Santiago P

rrProfessor

South West, Ohio

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Have you looked at the INO Lab HG-D760MG
Better resolution than the Hitecs and the ALigns

Team Minicopter - PeakAircraft.com
bavarianDEMON- Team Kontronik - Scorpion Motors-

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01-16-2009 10:56 PM  9 years agoPost 4
Kjarman

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noblesville, IN

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I have read about the Ino Lab servos and from people with first hand knowledge, they are not very precise.

I sold another one to Terrafirma...... wife wants to know where the money's at!!!!

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01-16-2009 11:18 PM  9 years agoPost 5
Santiago P

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South West, Ohio

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Point taken, I have not own one, and I only talk from the reviews and videos I seen comparing then with the 8717 and others. The tests showed great centering and good resolution, but first hand experience talks louder.

Team Minicopter - PeakAircraft.com
bavarianDEMON- Team Kontronik - Scorpion Motors-

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01-16-2009 11:18 PM  9 years agoPost 6
Rafael23cc

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Junction City, KS

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Why would you need 150+ oz of torque on a 50?

I would go with the 90 to 110 oz of torque servos. That should be plenty strong for the application.

So, on your list you only have one option.

That is the problem with
"I bought this so you should too thread"
Maye you were influenced by it from the beginning.

Rafael

Keep your feet on the ground, but your eyes on the sky.
Team Heliproz.com

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01-16-2009 11:22 PM  9 years agoPost 7
Heli 770

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USA.

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I would look at the HS-7966HB.

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01-16-2009 11:34 PM  9 years agoPost 8
Heliguychris

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Perth, West Australia

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Man alive i wish hitec would get out a 8 volt servo...... Ive done a bit of flying with my 5955s on 2s, and they did great, but one of em started showing some weird behaviour, so that waz the end of that....

anyone ever stripped a titanium gear?????..... i havent ,,,,, and god knows ive tried LOL

Nice specs on those servos, but even hitecs biggest fan(me) ,would have to admit that there centering isnt worth writing home about....

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01-16-2009 11:48 PM  9 years agoPost 9
Anthony.L

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Seattle, WA

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Have you looked at the INO Lab HG-D760MG
Do a search here on RR, not too long ago a person had real bad issues with shuttering on his INO Lab cyclic servos. Turns out other had seen it and nothing you can do. I would stay away from INO Lab servos and stick with a more proven brand like Futaba, JR, and Hitec (personally in that order).

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01-16-2009 11:51 PM  9 years agoPost 10
Anthony.L

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Seattle, WA

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My feedback would be with the pricing on the latest generation Hitec servos so close to the high end brands of Futaba and JR what is the advantage any more?

Let's face it, people don't buy Hitec servos because they are the best out there. They buy them because for the price savings over top of the line they do perform. Well when the price is the same or within $5 of the best, what's the point any more?

I'm not trying to flame Hitec, just food for thought.

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01-17-2009 03:00 AM  9 years agoPost 11
Eury

rrProfessor

Dover NH

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My feedback would be with the pricing on the latest generation Hitec servos so close to the high end brands of Futaba and JR what is the advantage any more?

Let's face it, people don't buy Hitec servos because they are the best out there. They buy them because for the price savings over top of the line they do perform. Well when the price is the same or within $5 of the best, what's the point any more?

I'm not trying to flame Hitec, just food for thought.
Plenty of people buy Hitecs because they are the best. Give me an unlimited budget, and I will buy Hitecs for any plane I put together, and I'll buy them for the tail of every heli while giving them serious thought for the cyclics as well. Hitecs are every bit the equal of Futaba and JR, and in many ways are better.

To answer the original post, of your choices, I'd buy the less expensive hitecs, or if they sell a version of the servo with the titanium gears, I'd get that. Any of the servos you listed are more than capable of throwing a 50 around. Personally, I'd also look into the Align 610s, I have a set on my T-Rex 700, and they are great servos.

Nick Crego

Citizen #0168

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01-17-2009 05:13 PM  9 years agoPost 12
Kjarman

rrApprentice

noblesville, IN

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Hey Eury,

I have to admit that the price is very attractive with those numbers. How are they as far as deadband and the servo's being matched with speed, that is my one true complaint with some of the hitec's that I have. Every once in a great while one will be a little slower then the rest....

Ok... I saw this thread... http://runryder.com/t478851p1/

Very impressive.

I sold another one to Terrafirma...... wife wants to know where the money's at!!!!

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01-17-2009 05:53 PM  9 years agoPost 13
Heli 770

rrProfessor

USA.

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The New Gen. servos has 1usec deadband.

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01-17-2009 05:57 PM  9 years agoPost 14
Kjarman

rrApprentice

noblesville, IN

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Really.... can you tell me please where one can find these to purchase... I am not having any luck with finding them... GravesRC, HeliHobby, Helidirect, Ready Heli, I can't find these at any of the usual vendors.

And, what is the difference between the 610 and 620??

I sold another one to Terrafirma...... wife wants to know where the money's at!!!!

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01-17-2009 06:04 PM  9 years agoPost 15
Heli 770

rrProfessor

USA.

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Servo City or Tower Hobbies.

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01-17-2009 06:05 PM  9 years agoPost 16
Eury

rrProfessor

Dover NH

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I haven't used the new ones, but the 6965 is one of my favorite servos. I use the programmer to turn the deadband all the way down. Horizon and Great Planes both distribute Hitec, so any hobby shop should be able to get them for you. Tower is always a good option.

Nick Crego

Citizen #0168

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01-17-2009 06:09 PM  9 years agoPost 17
Kjarman

rrApprentice

noblesville, IN

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No, I am talking about finding the 610 and 620.... They are deffinately not at tower. I should have been more specific.

I sold another one to Terrafirma...... wife wants to know where the money's at!!!!

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01-17-2009 07:01 PM  9 years agoPost 18
Eury

rrProfessor

Dover NH

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I got mine from Grandrc.

Nick Crego

Citizen #0168

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01-17-2009 07:08 PM  9 years agoPost 19
Kjarman

rrApprentice

noblesville, IN

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They only have the 620

I sold another one to Terrafirma...... wife wants to know where the money's at!!!!

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01-17-2009 07:51 PM  9 years agoPost 20
Eury

rrProfessor

Dover NH

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Send him an email, Ed gives great customer service, he'll get em for you.

Nick Crego

Citizen #0168

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HomeAircraftHelicopterRadio - Hitec Aurora › Hitec 7940TG vs. 7966HB vs. JR8717 Comparison
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