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HomeMy Site✈️Aircraft🚁HelicopterHelicopter Main Discussion › INVERTED DRIFT ON AR7200BX
04-07-2013 03:59 AM  6 years ago
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em3jefferson

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jackson ms.

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INVERTED DRIFT ON AR7200BX
Hey guys quick ?. i have a trex 550e v2 with dx7, and the ar7200bx i just installed. love it. when i give forward elev. to go inverted nose in, the heli drifts to my left which is right ail. when inverted nose in.
any ideas what parameter/dial i need to check. just releveled swash and made sure of 0 pitch.
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04-07-2013 04:04 AM  6 years ago
cudaboy_71

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sacramento, ca, u.s.

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drift usually means your gains are not high enough. but, i'd check your CG anyway. everything should be balanced right on the main shaft.if it ain't broke, break it.
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04-07-2013 04:11 AM  6 years ago
Avea8tor

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Middletown, De

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I agree with Cudaboy. Check your cg both on the lateral and longitudinal axis. Also, check your radio to make sure it is centering properly.
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04-07-2013 04:42 AM  6 years ago
em3jefferson

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jackson ms.

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thanks guys for the quick responses. on this unit which settings in particular? also some extra info. prior to the beast i had the 3gx on it. to the 3gx's credit this issue was'nt there. i've only changed the unit.
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04-07-2013 04:50 AM  6 years ago
Avea8tor

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Middletown, De

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Dial 1 on the beastx module is the cyclic gain. Just increase it a bit and try that.

From the version 3.0 manual:

Turn dial 1 clockwise to increase the swashplate gain. The factory setting for the dial is horizontal which corresponds to 100% swashplate gain. For your first flights we suggest not changing this setting. However, when using very small helicopters (such as 250 or 450 size), reduce the swashplate gain slightly.

In general the higher the gain the harder the helicopter will stop after cyclic moves and the helicopter will feel more stable in the air. If the gain is too high the helicopter feels spongy and tends to oscillate especially on the elevator axis.If the gain is too low the helicopter does not stop precisely after a cyclic movement and feels unstable in fast forward flight.
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04-07-2013 04:59 AM  6 years ago
Avea8tor

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Middletown, De

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Also, the beastx is reactive to vibrations. The tell tale sign (in my experience) is a right aileron roll at specific head speeds. If you have any vibes, track them down before they cause it to "really" get your attention. To further isolate the inevitable vibrations I find the 3m tape works better than the beastx mounting pad.

I fought with a 500 for the longest time after it started the dreaded right roll. Long story short, the tailblades were too tight, causing the vibration.

Stick with it. The beastx is a great fbl controller. It (just like the others) has a few gotcha items that take a little tweaking to work through.
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04-07-2013 05:07 AM  6 years ago
em3jefferson

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jackson ms.

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thanks bro. you guys are awesome.
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