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Sola_Conscientia · 04-13-2012, 08:15 PM

So I just installed my new "reconditioned" Spartan Quark and followed the installation instructions. I can already tell that this gyro is going to hold my tail rock solid as soon as I solve this tail shake issue.

So I understand that if the gain is too low the tail will wag and drift slowly and if the gain is too high the tail will hunt and shake and wag (or whatever you want to call it) very quickly. My problem is that I cannot find the "sweet spot" in gain percentage. When I change the gain the wag just get slower or faster. I have heard that I should turn the gain up until the tail shakes or wags violently and then back off the gain until it stops for maximum effectiveness. The problem is that the shaking never stops! it just gets slower and faster. I have literally tried hovering at every percent of gain possible. I am using a spektrum DX6i so the HH gain setting is 50%-100%. Literally tried every percent and back again without losing the tail wag. I am using an HS-8054mg tail servo. At this point I am assuming it is something mechanical so I have ordered a new control arm, tail rotor assembly, and pitch slider. Hopefully this sorts out the problem. Any ideas on what the problem is while I wait for the new parts?

Sola_Conscientia · 04-14-2012, 01:39 AM

show me some love people! I'm itching to get my heli off the ground again (albeit with a stable tail)

toonttm · 04-15-2012, 02:46 AM

Sounds like a vibe? what heli is it? maybe post in the relevant heli forum?

Angelos · 04-15-2012, 05:58 AM

Connect a servo to the receiver where the gyro gain normally goes and confirm that the servo moves when you adjust the gain on the radio. Very often the radio does not operate as we'd expect as a result the gain is not changing.

Assuming the gain works correctly, the most likely cause for the wag would be a very long servo arm. Please see here: http://www.spartan-rc.com/resources/...q.php?topic=84

-Angelos

Sola_Conscientia · 04-16-2012, 12:26 AM

I am flying a EXI 450 Pro belt driven with mostly Align parts (excluding the tail).

Thanks for the response and the link Angelos. I read the the whole page and thus have a better grasp on how mechanical gain affects the way a gyro responds. Gave me a few more ideas. Looks like I have to play around with my linkage setup. Thanks again

04-13-2012, 08:15 PM	#1 (permalink)
Sola_Conscientia Registered Users Join Date: Mar 2012	Constant Wag (gain setting regardless) So I just installed my new "reconditioned" Spartan Quark and followed the installation instructions. I can already tell that this gyro is going to hold my tail rock solid as soon as I solve this tail shake issue. So I understand that if the gain is too low the tail will wag and drift slowly and if the gain is too high the tail will hunt and shake and wag (or whatever you want to call it) very quickly. My problem is that I cannot find the "sweet spot" in gain percentage. When I change the gain the wag just get slower or faster. I have heard that I should turn the gain up until the tail shakes or wags violently and then back off the gain until it stops for maximum effectiveness. The problem is that the shaking never stops! it just gets slower and faster. I have literally tried hovering at every percent of gain possible. I am using a spektrum DX6i so the HH gain setting is 50%-100%. Literally tried every percent and back again without losing the tail wag. I am using an HS-8054mg tail servo. At this point I am assuming it is something mechanical so I have ordered a new control arm, tail rotor assembly, and pitch slider. Hopefully this sorts out the problem. Any ideas on what the problem is while I wait for the new parts?

04-15-2012, 02:46 AM	#3 (permalink)
toonttm Registered Users Join Date: Feb 2011	Sounds like a vibe? what heli is it? maybe post in the relevant heli forum? __________________ Trex 500E, Tarot 450 Pro V2 on 6S with Robird + MKS92A and MKS95i, Trex 250SE, mCPX x 2, Phoenix, Dx8 (sold: Dx6i, HoneyBee FP V2, mSR)

04-15-2012, 05:58 AM	#4 (permalink)
Angelos Registered Users My HF Map location Join Date: Feb 2005	Connect a servo to the receiver where the gyro gain normally goes and confirm that the servo moves when you adjust the gain on the radio. Very often the radio does not operate as we'd expect as a result the gain is not changing. Assuming the gain works correctly, the most likely cause for the wag would be a very long servo arm. Please see here: http://www.spartan-rc.com/resources/...q.php?topic=84 -Angelos __________________ SPARTANRC - R&D

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04-14-2012, 01:39 AM	#2 (permalink)
Sola_Conscientia Registered Users Thread Starter Join Date: Mar 2012	show me some love people! I'm itching to get my heli off the ground again (albeit with a stable tail)

04-16-2012, 12:26 AM	#5 (permalink)
Sola_Conscientia Registered Users Thread Starter Join Date: Mar 2012	I am flying a EXI 450 Pro belt driven with mostly Align parts (excluding the tail). Thanks for the response and the link Angelos. I read the the whole page and thus have a better grasp on how mechanical gain affects the way a gyro responds. Gave me a few more ideas. Looks like I have to play around with my linkage setup. Thanks again

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