lml@lancaironline.net Mailing List Archive

Hi Tom,

Lancair suggested the A/C condensation line be plugged with a plug drilled with a small hole which allows the water out while only allowing a very small pressurization leak. I suggest you contact them for the drill size and confirm they still endorse the technique. Seems to work fine on my IVP.

The gears on the outflow valve indeed turn slowly. The speed is adjustable by the rate knob on the pressurization controller. The gear set is for airport elevation selection and is not related to the cabin altitude bellows function which regulates cabin altitude.

My IVP elevator push/pull shafts pass through bronze bushings at the pressure bulkhead. If your ES-P has the same set up no rubber boots are necessary. This is a fairly recent (?? years) upgrade from Lancair. Similarly the close fitting shaft/washer set up for the aileron push/pull was designed to replace the rubber boots originally installed.

Jack Morgan

On May 28, 2014, at 6:00 AM, Lancair Mailing List wrote:

From: "Thomas Whalen" <thomasjwhalen@att.net>
Subject: Pressurization questions for my ES-P
Date: May 27, 2014 7:51:31 AM EDT

I am working on sealing up my cabin and getting the pressurization going in my ES-P

The electric air-condition mounted on the rear bulkhead has a condensation drain that goes overboard through a ¼” hose. Is this usually an issue? Does this need a control valve or should is drain to an internal tank?

When testing the cabin pressure control valve on the ground but adjusting the panel controller back and forth, the motor and gears move extremely slow. Is this normal?

On the ES-P, are rubber boot necessary on the elevator push rod that goes through the bushing in the rear bulkhead and the aileron control rod from the stick that goes through the bushing into the sealed box?

Any suggestions on where to put the 6 PSI pressure pop off valve? The is very little room on the pressure control valve box under the left rear seat.

Is there a good smoke source for finding leaks when hooked up to the shop vac?

Thank you,
Tom Whalen
N444TW