Mailing List lml@lancaironline.net Message #55164
From: Douglas Brunner <douglasbrunner@earthlink.net>
Sender: <marv@lancaironline.net>
Subject: RE: [LML] Legacy Trim Tab Servo Speed Control
Date: Mon, 24 May 2010 08:08:18 -0400
To: <lml@lancaironline.net>

Valin,

 

I looked at a product at Sun n Fun that puts a two speed switch an air speed switch.  Basically, it gives you two speed trim activated by differences in air speed.

 

I’ll try to find the info for you

 

Doug

 

From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Valin & Allyson Thorn
Sent: Sunday, May 23, 2010 11:53 PM
To: lml@lancaironline.net
Subject: [LML] Legacy Trim Tab Servo Speed Control

 

Hey Legacy gang,

 

Could I get recommendations on the best way to set up the Ray Allen trim tab servos in the Legacy so that they have the right sensitivity throughout the range of flight speeds?  I know from 99L that at cruise speeds without a speed control rheostat to slow the tabs down that they’re too sensitive – slightest tap on the switch causes a “bump”.

 

Ttcwtech.com has a $49 speed switch that they sell that can be used to set a speed where the sensitivity changes – up to 145 kts.  Is it good enough to have a speed control rheostat cut in to slow the tabs down once the gear and flaps are up?  Or, has anyone found a rheostat that’s directly driven by the airspeed so that the sensitivity is always in proportion to flight speed?  Other ideas?

 

Thanks,

 

Valin Thorn

Eternal Legacy project

Houston, Texas USA

 

 

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