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HomeAircraftHelicopterAlignT-REX 700N › Spartan 760 question
01-12-2009 09:25 PM  9 years agoPost 1
ch-47c

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san jose, ca

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Never mind.

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01-13-2009 03:36 AM  9 years agoPost 2
FlaG8r

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Florida

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to answer your question...yes, it's that awesome.

Life is tough, it's tougher if you're stupid

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01-13-2009 07:54 AM  9 years agoPost 3
Vantskruv

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Upplands Väsby - Sweden

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Haha, yet another Spartan fanboy! Though I've to confess, I am it too...I'm feeling like a SPARTAN when flying with that gyro, not afraid! COME ON SPARTANS! LET'S SHOW THEM! (what?)

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01-13-2009 10:10 AM  9 years agoPost 4
ch-47c

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san jose, ca

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Hey Spartan fanboys maybe you can help. My friends Spartan 760 holds no better than a GY401 and blows out like a weathervane doing piroetting circles. It's on a Trex 700 that had a GY611 and flew great. I have one on the way and I'm now leary about getting it after great service from Futabas and JR gyros. Trying the Spartan after considering the Solid G. What are you using for servo arm distance and gain? What heli are yours on? Need an honest answer because I've seen them work before nicely.

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01-13-2009 10:31 AM  9 years agoPost 5
Vantskruv

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Upplands Väsby - Sweden

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Hi ch-47c!

I'm using the SPAAARTAN on my Vibe 50. I haven't had any problems at all. The rudder servo is sitting on the front and uses the same linking-system as the TREX 700. With my 8900G rudder-servo it works great, though, if I'm allowed to say *hrrrrm", I'm not the very best flier out there, but with tic-tocs and drastic pitch changes, I haven't noticed any taildroppings. Though you should get a better opinion by a flier who really can push the gyro to the limits (but from comments and info from the web, I assume the Spartan is one of the best out there). Anyway, I don't know if you are a beginner or not, but increase the gain until the tail shakes, then decrease the gain until it stops. I guess this step will get you the best gain. Also check what type of servo you have, and setup the gyro to that type of servo (it has 3 settings, if you don't use a comnputer). A better more precise way is to program the gyro from the computer where you have more options to set, though you need a link to the computer which Spartan sells. That's the only help I can give you.

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01-13-2009 11:06 AM  9 years agoPost 6
ch-47c

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san jose, ca

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Vantskruv,
How is Sweden? I haven't been there since 1998. I use to fly thru Stockholm-Arlanda, Gotenburg, and Orebrew from Helsinki and Copenhagen. My Swedish spelling sux, but my Finnish and Dannish spelling is OK.
The info he is looking for is the servo arm ball distance, gain, and any settings you changed from the default values. Whatever you have would help. Did you use the foam and metal plate that came with the gyro? He has a JR 8900g in his Trex700. He had a GY611 and it worked great. I think he said the servo arm ball was at 12mm from the 611. He was going to change it to somewhere between 13-17mm. His gain was down to 37% though he started at 73%. He has a FlashLink.
Thanks

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01-13-2009 12:55 PM  9 years agoPost 7
S76 Mech

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Hatboro, Pa.

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I just swapped out a 770 for a Spartan on my 700 and it Rocks!

Easy setup, rigging was dead on, tail locked very solid. Also it doesn't seem to be as 'sensitive' to vibes as my 770 was, which was causing alot of tail kicking.

Good Stuff!

Gaui Greatness X7, X5, NX4, X3

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01-13-2009 08:50 PM  9 years agoPost 8
macane

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Denmark

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Sound like to low a gain or just a bad gyro try to upgrade or reinstall the firmware on the gyro.

Using the spartan ds760 on a trex600 with a 9256 doesn't go anywhere i don't tell it to 100+ meter tailslides slamming the breaks so hard the motor is gasping for breath and the tail doesn't even think of moving. gain setting on a dx7 is 75% in the gyro menu, translates to about 50% gain.
I can't really compare servo arm geometry, but try aim for a spacing on the servo wheel that gives you 90-100+ endpoints in the gyro.
Acceleration and deceleration is set to maximum on both in the setup program.
Be sure the servo is set to right profile in the configuration tool.

Servo is set with the thick foam the metal and the thin double sided tape that is provided with the gyro.

Don't know if this is helpful, but that my setup and the same setup is working for a few others in my club.

regards
Christian

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01-13-2009 10:03 PM  9 years agoPost 9
Ralphw

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Spring, TX

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OK, I pulled the lid off of my 700 and here what I've got....

On the servo (8900G), I'm using the long arm that came with it and on the second hole in...thats either 17mm or 18mm and I didn't have the time to measure. Gyro is mounted using the thick pad, the plate and the thin pad as recommended by Spartan. The gain setting in the X9303 gyro menu is 73 for HH and 30 for rate (haven't done much with rate ) and on Day 1 I loaded the Kammerer parameter file. Rudder ATV is set to 125.

Tail holds solid, no wag, no drift, steady piros. Granted, I'm no 3D master, so YMMV.

If he's having trouble, Angelos is just an email away and he seems to be able to fix anything to do with the Spartan.

Ralph W.
"Life's Short, Fly Fast"

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01-14-2009 09:21 AM  9 years agoPost 10
ch-47c

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san jose, ca

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Sounds like everything is close except the servo arm ball distance. He remeasured and it was about 10mm. Hee is going to move it out to about 13mm and will test fly Thurs.
Thanks guys and will pass this on to him.

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01-14-2009 01:39 PM  9 years agoPost 11
raptorheli2

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rip off britain and no changing it

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10mm on a 700 is FAR too short of an arm. no surprise it was letting go. you have also made the servo a lot slower by going to 10mm whcih makes this worse. should be ok going 13-15mm

cheers


www.waterfoothelis.com

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01-14-2009 02:31 PM  9 years agoPost 12
Ghostrider

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San Diego, CA

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T700, I'm using the 8900G servo and the stock Align wheel for the servo wheel. Insane holding!

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01-14-2009 09:15 PM  9 years agoPost 13
REGULATER

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Bakersfeild, CA

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I agree with Ghost I watched his 700 yesterday and it was locked in.

Mark

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01-15-2009 06:21 PM  9 years agoPost 14
ch-47c

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san jose, ca

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I talked to him yesterday and he remeasured the arm and it is 12.5mm. He is going out to 15mm and see how it is today. Thanks all.

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