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T-REX 550 › Is the gyro gain too low?
02-26-2012 10:26 PM  5 years agoPost 1
rudyy

Elite Veteran

E. Amherst, NY

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I am using AR7200BX and HS6965 tail, and my throttle curve is at 90% flat.

I need to set the gyro gain to 25% on my JRX9503 radio in order to get rid of the wag?

Do you think it is too low? If yes, how to rectify the problem?

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02-26-2012 11:18 PM  5 years agoPost 2
Stephen Born

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USA

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Do you think it is too low?
Are you thinking it is in rate mode?

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02-27-2012 01:21 PM  5 years agoPost 3
Richardmid1

rrProfessor

Leeds, England

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Not its not too low its only a number.

You tell us, is the tail holding?

A good test of gyro gain is to turn the heli 45 degrees after the gyro has initialised, if the tail doesn't reach full pitch the gain is too low, if you reach full tail pitch before 45 degrees the gain is too high.

60% of the time, it works every time!

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02-27-2012 11:21 PM  5 years agoPost 4
D.Magee

Key Veteran

kansas city mo.

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A good test of gyro gain is to turn the heli 45 degrees after the gyro has initialised, if the tail doesn't reach full pitch the gain is too low, if you reach full tail pitch before 45 degrees the gain is too high.
Not shure what you mean?

Do you mean move the nose of the heli 45 degrees on the ground and watch the pitch change on the tail to see if it moves to full pitch ?

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02-28-2012 01:32 AM  5 years agoPost 5
jsenicka

rrProfessor

Eagle River, WI

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that is 50% gain.
25% or 75% gyro gain on the gyro menu is equivalent to setting a 50% end point.
50% is essentially no gain. 0% and 100% are the opposite end points.
So at 25% on gyro menu you are at equivalent to 50% gain

Jim Senicka
Team Manager, GrandRC Flight Team

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02-28-2012 01:50 AM  5 years agoPost 6
Stephen Born

Elite Veteran

USA

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Jim,

In a Futaba radio, is - rate mode and + heading hold?

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02-28-2012 09:47 PM  5 years agoPost 7
Richardmid1

rrProfessor

Leeds, England

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Do you mean move the nose of the heli 45 degrees on the ground and watch the pitch change on the tail to see if it moves to full pitch ?
Yes.
that is 50% gain.
25% or 75% gyro gain on the gyro menu is equivalent to setting a 50% end point.
50% is essentially no gain. 0% and 100% are the opposite end points.
So at 25% on gyro menu you are at equivalent to 50% gain
This is why I don't use the gyro menu! I use the Gear channel instead and just use the gear channel travel adjust to adjust the gain.

60% of the time, it works every time!

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02-29-2012 12:31 AM  5 years agoPost 8
j5coat

Veteran

Phoenix

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the lights on the ar7200 tell you how much gain you have in that mode. a a= 0% gain m= 100%. go to your gain channel and adjust the gain you will see the light moving up and down the bx.

Trex 700, Trex 600n

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02-29-2012 01:12 AM  5 years agoPost 9
jsenicka

rrProfessor

Eagle River, WI

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Jim,

In a Futaba radio, is - rate mode and + heading hold?
On Futaba gyro menu, you have a few options depending on mode selected. In GY mode, you can select 0-100% AVCS mode (HH) and 0-100% NORM mode (rate). Other gyro modes act similar to what you see here.

On JR 50% is center (1500 usec). 50-0 and 50-100 are the opposite sides, and depending on what gyro you are connected to, will either select rate or HH.

Jim Senicka
Team Manager, GrandRC Flight Team

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02-29-2012 01:16 AM  5 years agoPost 10
Stephen Born

Elite Veteran

USA

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The new DX7s gyro menu has - as rate and + as HH. I used to own the DX6i, and 0-49 was rate and 50 -100 was HH.

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