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09-15-2009 03:49 AM  11 years ago
TonyTypeS

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New Orleans, LA & El Monte, CA

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Just wondering if it's normal for me to be able to have 100% gain on my DX7. I can go all the way up to 100% and not get any wags. The true gain on the Mini-G is 80% according to the G-View.

My setup:
-Trex 450 Pro
-DX 7 with the gyro option on
ATV's at 100 and no expo and no DR on the tx
-Mini-G gyro
-9650 servo with 9257 gears
-Jazz 40 esc with the stock align 450sp motor, 90% throttle curve
-+13/-13 pitch and +8/-8 cyclics
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09-15-2009 02:14 PM  11 years ago
lightningrc

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UK

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May be your servo horn is too small
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09-15-2009 03:58 PM  11 years ago
JamesV

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Savannah

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Make sure you have 6-8 degrees of pitch mechanically built in to make the nose go right to counteract torque. I know the Pro when set up for the tail pitch slider arm set to 90 degrees it actually give pitch in the wrong direction. You can do a tail blade grip flip mod to correct this. Or do what you should do with any gyro and set it up in rate mode first to get rid of any drift. It tells you to do this in the Mini G manual anyways. I have a Mini G on my pro and its absolutly awesome. They have a great feel to them and hold like a rock all the time.

PS not trying to sound like a smart a**, but it is a good practice to set up any gyro mechanically correct first. Try that and let us know what you find out.
James VanHook
Performance Plus RC Rep
Phantomhobby.com
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09-15-2009 04:59 PM  11 years ago
TonyTypeS

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New Orleans, LA & El Monte, CA

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I'm using the 4 point star arm and have the ball on the third hole starting from the inside.
I have 7 degrees on the tail blades just like the manual says to do. I even flipped the grips to see if it made a difference but it didn't.

I mean my tail holds rock solid so I'm not complaining I love the way the tail feels. Just wondering if it was ok to run full gain and not have any wags. That the part that got me. None of the gyro's I used before was able to do that lol. Maybe the Mini-G is just that good
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09-15-2009 05:03 PM  11 years ago
JamesV

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Savannah

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I keep turning my gain up and I still have yet to get a wag. I am at 85% I think using a align DS520 servo. Hmm I thought you were saying the nose piros out 45 degrees on hard punch outs. Have you hovered the helicopter in rate mode and made sure the tail does not drift. Just because it says 7 degrees in the manual you may need to adjust it so it does not drift in rate mode. When this is done properly you should not have a tail stepping out in heading hold mode.James VanHook
Performance Plus RC Rep
Phantomhobby.com
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09-15-2009 05:04 PM  11 years ago
Jason Bell

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California

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Yea that is a plus with the Mini G, most models can run up to 100% gain on the tx, which is quite amazing as every thing else is usually 30-60%. I wouldn't recommend running anything over 100% though. Personal experience steps in thereAMain.com
Mikado "V Team"
Xnova Motors
Optipower USA
RCProPlus
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09-15-2009 09:51 PM  11 years ago
TomR

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Norway

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same with my mini g and DX7... 100% on radio 80% on g-view.
holds good. no waggietaggie. but would have been nice to get it to wag so i know have it set up all the way.
Thunder Tiger, Curtis Youngblood, Scorpion, Rapicon, Hyperion
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09-16-2009 01:41 AM  11 years ago
TonyTypeS

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New Orleans, LA & El Monte, CA

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JamesV
At first the tail was kicking out was because my gain was too low. I used the recomended gain at 49% on the G-view as a starting point. I thought that 49% gain was high enough compare to the other gyro's that I used. I did go back and setup my tail in rate mode. Before, I just centered everything and didn't notice any differnce in tail performance. But CY and everyone else says to setup the tail in rate mode so thats what I did. I don't use rate mode BTW. I kept on bumping up the gain till the tail hold without kicking out. I just got curious and kept on bumping up the gain to see if it's any better.

I'm just suprised that I could get the gain up so high without any wags. 100% is the highest my DX 7 will allow me to go but I lowered the gain back to 85% on my DX 7. Thats where the tail hold perfect with no kick outs.

TomR
Yea it would be nice to get a wag just for the heck of it lol. I guess thats the advantage the Mini-G have over the other gyro's.
Or maybe there's a parameter on the Mini-G that doesn't allow the gain to go above a certain level? Oh well the tail hold awesome so I'm not going to worry about it. Just good to know that I'm not the only one that notice it too
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09-17-2009 03:24 PM  11 years ago
HeliVIG

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Hearne, TX USA

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Yes, 100% on the radio is not unusual. We recommend the 49% start point as a very conservative number. Often the Trex600 is at 100% and the trex700 is near 100% as well (about 80% in the G-view).

The high gain is not a problem and will not tend to burn out your servo. Many people from years past were trained with the Futaba 601 not to go past a certain gain for fear of burning out the tail servo. With the Mini G as long as the tail is not oscillating you are fine. So turn it up as high as it will go. If it gets to 100% and does not oscillate then you are still fine.
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09-17-2009 03:30 PM  11 years ago
TonyTypeS

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New Orleans, LA & El Monte, CA

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Thanks for the reply CY Good to hear from the man himself that its normal. I going to bump up the gain some more.
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09-17-2009 10:06 PM  11 years ago
CoronaL

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Winnebago IL

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great info

I'm looking to put a Mini G I have on my shelf on the 2nd Velocity 50 I got.

I like my spartans but they do alot a bit of tail drift on power punches etc... whereas my JR770 is solid in that respect. The flexibility of the Spartan is nice though in tuning certain parameters, so maybe I'll find the best of both worlds with the mini-G .
Randy!!! I am the liquor
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