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Other › setting gyro in none HH??
02-09-2006 03:04 AM  12 years agoPost 1
HighSpeedDirt

rrNovice

Des Moines Iowa u.s.a.

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Hi,Just to see if i've got this right,set up the 401 in none HH mode first by moving the servo to put a little pitch in the blades so that it holds the tail,and turn down the gain until the tail doesent wag? So what mode do i want to do this in normal or idl up, i plan on just using normal to spool up and do most of my flying in idl up.Any advice would be great.

Thanks

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02-09-2006 04:49 AM  12 years agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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Assuming you know how to set up your transmitter to put the 401 in Normal and AVCS mode, apply power to the gyro in AVCS mode ALWAYS. The red LED will be on solid to indicate that you are in AVCS mode.

After it initializes, switch to Normal mode. Your TR control mechanical setup should be set up so that at neutral, the servo arm is in the center of its travel, and moves equal amounts in each directionl. The TR bellcrank is perpendicular to the tail boom. Set the gyro travel limits to keep the linkage from binding at both extremes.

With the mechanical stuff properly set up, the 401 initialized in AVCS mode, switch to normal mode. Hover the helicopter. Adjust the TR linkage so that the heli hovers with the gyro holding the tail still.

Once you've set up the mechanical stuff, and the linkage in normal mode, you're pretty much ready to fly and adjust the gains in each mode.

Start with a high gain setting, then fly. If the tail wags side to side, decrease the gain until it just stops. Gain is now properly set.

Beyond this, it doesn't matter what transmitter mode you actually do all this in as long as you do it correctly.

With the mechanical stuff OK, and the gyro properly adjusted, it's up to you to figure out if you want Normal or AVCS mode in a particular flight mode. Generally, once you've tried AVCS (HH mode), you'll probably not use Normal mode.

Dave

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02-09-2006 05:19 AM  12 years agoPost 3
HighSpeedDirt

rrNovice

Des Moines Iowa u.s.a.

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Hi' I know how to set up the TX and i've got the TR mechanical set up perfect,after i adjust the TR linkage in normal mode to get the tail to hold, wont i have to adjust the gyro travel limit again?

Thanks for your help

J.R.

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02-09-2006 05:33 AM  12 years agoPost 4
dkshema

rrMaster

Cedar Rapids, IA

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If you've tweaked the gyro travel limit to keep the mechanics from binding, then shorten or lengthen the pushrod -- you'll have to recheck the limit setting to make sure you still don't bind at either extreme.

Dave

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02-09-2006 02:25 PM  12 years agoPost 5
BarracudaHockey

rrMaster

Jacksonville FL

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Also you only want enough gain to hold the tail in fast sideways flight. That crank up the gain till it wags then backs off is old school.

Andy
AMA 77227
http://www.jaxrc.com

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