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HelicopterAlignOther › Hitec 6965 or 6975
09-11-2007 01:59 PM  10 years agoPost 1
Helijockey

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150 miles from somewhere

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I'm just getting stuff together for a nitro sport I plan on buying and was thinking of using either of these servos on the swash. Which would u guys recommend? On throttle I was thinking of the 6965 or futaba 9254.

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09-11-2007 06:51 PM  10 years agoPost 2
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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Don't know if this will help.

http://www.runryder.com/helicopter/t372534p1/

I would recommend the 6975 on cyclic, and the 6965 on throttle and tail servo.

I like the 6965 on tail better than Futaba 9254.

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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09-12-2007 05:36 AM  10 years agoPost 3
Helijockey

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150 miles from somewhere

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Thanks Rockohaulic, I'll put 6975's on swash and 6965 on throttle. For the tail I was thinking of using the GY611 with 9256. But I'm interested to know why u prefer the 6965 over the 9254.

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09-12-2007 05:56 PM  10 years agoPost 4
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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I'm getting a better response with my new 6965, and you can run it on 6 volts, and the 9254 have a rep for high failure rates.

I haven't had 9254 fail myself, but the other 2 reason's are good enough for me!

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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09-12-2007 06:23 PM  10 years agoPost 5
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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And even more info..........

Even the 6965 at 4.8 volts kicks the 9254 butt at 30 oz-in load. Only problem is - how much load does a tail servo see???

But even at half the rated load of the 9254 (20 oz-in), the 6965 at 6 volts has caught up!!!

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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09-12-2007 08:35 PM  10 years agoPost 6
helimatt

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Lafayette, IN

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I am running older version Hitec 5975's for the swash on my 600E- they work great. The 6975's replaced the 5975's so they must be better in some way.

I agree about the tail servo too, though I am using a Fut 9254 (it was on the heli when I bought it)

I did an experiment with the tail pushrod on my little Trex 450- ran up the tail (no main blades installed), with the pushrod not connected to the tail servo. It was surprising how much effort it took to put a reasonable amount of pitch control into the tail. About linear increase in effort required moving the link from its "neutral" point, which it naturally sought as tail blades zero pitch. Moving rapidly off that point took a lot of force, which explains why my little Fut 3154 tail servo gets hot (I swapped in a larger servo).

I am sure that a 600 tail takes much more than 30 oz-in to put in a hard piro start-stop, and in sideways flight or pirouetting FF. Tail slides- forget it; no wonder my tail blows out!

So Rockohaulic, very useful data you've gathered there. Go for the higher torque rating, even if the zero-load speed is slightly down.

Never, ever, ever, ever give up.

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09-13-2007 02:33 PM  10 years agoPost 7
Helijockey

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150 miles from somewhere

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Thanks Rockohaulic, helimatt! I've also bought a hitec servo programmer. Sometimes I need to use more subtrim than I'd like, the programmer should sort that out

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HelicopterAlignOther › Hitec 6965 or 6975
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