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Date: Wed, 09 Oct 2013 12:13:19 -0400
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From: Craig Berland <cberland@systems3.net>
Subject: [LML] Removing vacuum pump?
Thread-Topic: [LML] Removing vacuum pump?
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I have an all-electric airplane as well and chose to not have any vacuum su=
pplied to the Dukes valve.  The only difference is the rate in which pressu=
rization starts building in the cabin on takeoff roll.  Once airborne, vacu=
um has no effect on the pressurization system.   I choose to apply power a =
little more slowly than some pilots.  This prevents any pressurization disc=
omfort and typically I don't need any right brake to hold centerline.  Take=
off distance is not an issue.  If I can land there, I can easily takeoff th=
ere.  I know one pilot who has developed an electronic circuit to control a=
 small electric vacuum pump based on the landing gear position.  So there a=
re several options.  In my opinion, keeping the engine driven pump is the l=
east desirable.

Craig Berland
N7VG


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