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T-REX 450 › Logitec 2100T Tips..
07-13-2008 09:26 PM  9 years agoPost 1
Vertiviper

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NY- USA

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I test flew my 450 today with a 2100T on it. Took off and the tail violently shook back and forth. I barely landed without losing it..

Does anyone have any setup tips? I'm using a DX7 with it.

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07-13-2008 09:29 PM  9 years agoPost 2
GroundMagnet

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St Louis

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Well with out knowing anything else about you’re setup I would guess try turning down the gyro gain.

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07-13-2008 09:56 PM  9 years agoPost 3
Vertiviper

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NY- USA

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DX7 w/ar7000
2100T gyro w/ds3400 servo

The instructions were not written by someone who speaks English as a first language.

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07-13-2008 10:28 PM  9 years agoPost 4
702nitro

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Las Vegas, NV

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This gyro has been working flawless for me.

1) First make sure to get it as close to perfect in rate mode without any drift.
2) No binding on tail rod
3) Absolutely use a good gyro mounting tape!!!. In fact i'm using a spare Spartan mounting tape and it provides a lot of dampening.
4) Play around with gyro gains until it you achieve good holding without any tail wag
5) Rotation Rate - I have a JR 3400G, you think you would have to set it for minimal delay(Far led to the right), but i'm actually backed down 3 leds from the far right.
6)***If all else fails, The PCB board is not secure in the case, in fact the board just goes in and on goes the bottom case. I placed foam (2 pieces about 3mm thick) between the back casing and the pcb and it has helped tremendously in dampening any external vibrations that reach the gyro unit. I swear this thing hold like a spartan.

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07-13-2008 11:06 PM  9 years agoPost 5
Vertiviper

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NY- USA

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702--

thanks for the insight!

I just found a great video setup guide on another forum.

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07-15-2008 03:47 PM  9 years agoPost 6
TomRex

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West Palm Beach Join Date: 12-28-2005

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Don't use a strap, use the gyro tape that comes with the gyro and stretch it as the instructions say. If you still get some wag it may be the v2 slider slop

Ignorance is the absence of facts.Stupid is lacking the intellectual capacity to comprehend the fact

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07-15-2008 03:58 PM  9 years agoPost 7
Vertiviper

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NY- USA

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I actually figured out what I was doing wrong.

The instructions were more or less useless to someone who speaks English.

I had my gain on 100% and did not setup the tail blades to zero pitch in rate.

I've been able to translate the instructions to an understandable level and have since lowered my gain to a starting point of 40/40, also setting up the tail blades to have close to zero pitch in rate mode.

I guess i'm just used to the 401, though, the more I use this gyro the more I like the fine tuning options more so than the 401.

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07-15-2008 06:48 PM  9 years agoPost 8
702nitro

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Las Vegas, NV

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I had my gain on 100% and did not setup the tail blades to zero pitch in rate
If memory serves me correctly it's in rate mode with approx 30% gain(check that first led is lit) and it is not zero pitch, but enough pitch to correct any rotational torque caused by main rotor blades.
In other words in a clockwise rotating rotor head the tail will want to move to the right, so you would give pitch to move the tail to the left.

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07-15-2008 06:53 PM  9 years agoPost 9
Vertiviper

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NY- USA

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It's slightly offset to account for the natural rotational physics.

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07-15-2008 07:06 PM  9 years agoPost 10
702nitro

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Las Vegas, NV

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Very naice!

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07-16-2008 12:34 AM  9 years agoPost 11
Vertiviper

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NY- USA

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Success!

Just got in from a good afternoon of flights. Finally got the gyro dialed in!!

I'll set the scene....

T'was a warm summers afternoon. After a hard day at work and dealing with the stresses of life, I had to answer the undieing question..."i hope the changes made won't make me crash on my next flight"....There I stood, full charge, tweaked gyro,..checklist..throttle hold, plug in battery, HH mode switch on, cyclic movement OK...a litte test spool, no vibrations no drifting, Alright.

....the spool then increased and she became light on her feet,....then her toes....then her toe nails...no turning back now....A little right cylic to counter act and then silence.......the sound of air wiffing past two thin carbon fiber blades and the erie whistle of an electric motor. I wait with baited breath for my emergency crash plan, thinking about which parts I have in my stock pile that will soon need to be put into action; not today my friend, not today. She flew like a dream; thoughts of "What's a 401??" ran through my head.. Beep Beep, Beep Beep...6 minutes already???? ...and land.

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07-16-2008 12:59 AM  9 years agoPost 12
GroundMagnet

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St Louis

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Nice Vert and great story telling, I was there with you man I could see it all.

Logo400 Vbar
Beam E4

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07-16-2008 04:03 AM  9 years agoPost 13
702nitro

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Las Vegas, NV

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Nice to hear you made it You're going to love this gyro. It takes a little bit more effort and patience but in the end all that matters is that the tail is rock steady.

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T-REX 450 › Logitec 2100T Tips..
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