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Date: Thu, 10 Oct 2013 15:48:51 -0400
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From: "pete@leapfrogventures.com" <pete@leapfrogventures.com>
Subject: RE: Removing vacuum pump?
Thread-Topic: Removing vacuum pump?
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The Dukes does not require a vacuum pump to work properly.  The only purpos=
e of the vacuum port is to dump pressure on takeoff to avoid the ear pop in=
side the cabin.  If this pop doesn't bother you, then no need for a vacuum =
pump.  If it does, it can easily be accomplished with a switch that grounds=
 pin 4 on the Dukes head and turns on a small vacuum pump to pull the bello=
ws open.  Just make sure you turn it off before getting too high to avoid a=
 sudden pressurization.  I have mine set up with a VP 200 such that it auto=
matically turns on when in takeoff mode and turns off when the VP200 switch=
es to cruise mode.  Has worked flawlessly for 600 hours.

Here is the pump I use:

https://www.sparkfun.com/    $14.95 - ROB-10398 - Vacuum Pump - 12V  =20

Pete


-----Original Message-----
From: k T [mailto:ktad9@hotmail.com]=20
Sent: Wednesday, October 09, 2013 6:46 AM
To: lml@lancaironline.net
Subject: Removing vacuum pump?


Hello Dico,
You will need a vacuum port to the Dukes pressure valve for the pressurizat=
ion to work correctly, I do not have any gyro instruments either but I need=
ed to install an electric vacuum pump near the Dukes valve

Kamal T

N1104T