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HomeAircraftHelicopterRadio - Hitec Aurora › Hitec 7940TG vs. 7966HB vs. JR8717 Comparison
01-17-2009 08:49 PM  9 years agoPost 21
Kjarman

rrApprentice

noblesville, IN

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Are the 620's any better, I noticed that they were a smidge faster?

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

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01-17-2009 09:14 PM  9 years agoPost 22
Santiago P

rrProfessor

South West, Ohio

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The New Gen. servos has 1usec deadband.
Ahhh, NO.

Many of the new super fast mid priced servo crops cannot hold 1usec deadband. The only ones that comes close to that are some of the Hitec HB of TG geared servos. Some come with a 2usec deadband that you can program down. Eury has played, tested, and written about those plenty. If you missed it, check out the thread pointed out 8 post back.
What many of the new Gen servos have is much improved servo backlash, some have none, and have little or no degradation with use.

I challenge anyone looking for a mid priced servo for a 50 helicopter to try a Futaba 9452; for $79 is as good as any of the off brand servos in that price range.

BTW, I don't consider Hitec an off brand.
BRRRRR, is cold out!

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

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01-17-2009 09:21 PM  9 years agoPost 23
Heli 770

rrProfessor

USA.

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Why do the spec. show a 1usec deadband?

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01-19-2009 04:52 PM  9 years agoPost 24
jester4

rrKey Veteran

Brampton, Ontario

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My money goes to Hitec from now on. I am currently using 6965's for the tail and throttle, and based on what I have seen with how they perform and sustain in a crash (many) they are good servo's that are priced fairly.

I am currently using 9451's for cyclic (9452's are newer gen.), and they are nice, but right off the hop I had one fail within 5 flights. Quite honestly, unless you are into "crack", I don't see a need for those ultra fast 8717's on 2S. I'm using 2S a123's unregulated on my ships and all is nice and quick enough..

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01-21-2009 02:33 PM  9 years agoPost 25
jetfixrguy

rrVeteran

Florida

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What is deadband? And why would you turn it down?

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01-21-2009 02:55 PM  9 years agoPost 26
Heli 770

rrProfessor

USA.

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In a servo it's the center area where the servo doesn't receive a signal. Better centering of the servo with a smaller area. Also on large aircrafts with two or more servos controlling a single surface they will use a larger deadband on them so the servos will not fight each other trying to center.

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01-21-2009 02:59 PM  9 years agoPost 27
jetfixrguy

rrVeteran

Florida

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Ahh ok, thanks!!

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01-21-2009 03:24 PM  9 years agoPost 28
Pinecone

rrKey Veteran

Maryalnd

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Actually dead band is how much of a signal change the servo needs to actually change position. Witha wide deadband, you would have to move the stick a bit to get teh servo to respond.

0 deadband, the servo tracks every movement. The problem is, the signals can change for reasons other than you moving the stick. Dirty pots, noise in the system, etc. So 0 deadband can cause the servo to hunt all the time.

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

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