REFLECTOR: Gear Warning System

[Andrew Ellzey]

Al,

Please send me a copy.

Andy




________________________________
From: Al Gietzen <ALVentures at cox.net>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Sent: Sat, January 22, 2011 10:53:26 AM
Subject: Re: REFLECTOR: Gear Warning System


As promised, I have scanned my gear circuit diagram which uses the airspeed 
switch to both prevent gear up when on the ground, and provide warning if speed 
is below set speed (mine set at 90 kts) and the gear is not down.  I also have a 
circuit diagram for a tone generator that can provide a alarm input to your 
audio panel for hearing in the headset.
 
Both of these scans are larger than allowed on the reflector.  If you are 
interested, I can e-mail directly to you.
 
Regards,
Al Gietzen
 
-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf 
Of Al Gietzen
Sent: Saturday, January 15, 2011 12:46 PM
To: 'Velocity Aircraft Owners and Builders list'
Subject: Re: REFLECTOR: Gear Warning System
 
I do have the squat switch, I installed it back in 1999. It is set to activate 
at 40 KIAS. Unfortunately 

at touchdown, my airspeed is ~ 65 KIAS, so the squat SW dose not prevent the 
gear from going up.
Michael, Bob;
 
That airspeed switch has a small allen-head adjustment screw at the top center 
whereby you can adjust the speed at which it switches.  Mine is set for about 90 
Kias (it has a band width of a few kts), and has worked consistently and 
reliably for 200hrs and over 4 years. My SE RG lands hotter than your plane by 
about 15 kts – canard stall is about 70.
 
My speed needs to be about 90 for gear retraction; and if I’m below 90 with the 
gear up the alarm is actuated.  There is of course a reset button for the rare 
occasion when I want to play below 90 in the air.
 
The circuit diagram is integrated into the landing gear system on an 11 x 17 
which my scanner won’t handle.  I’ll figure out a way.
 
Al
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