X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 14 Mar 2013 12:38:34 -0400 Message-ID: X-Original-Return-Path: Received: from mail-ie0-f182.google.com ([209.85.223.182] verified) by logan.com (CommuniGate Pro SMTP 6.0.2) with ESMTPS id 6120473 for lml@lancaironline.net; Thu, 14 Mar 2013 09:38:48 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.223.182; envelope-from=toddlong1@gmail.com Received: by mail-ie0-f182.google.com with SMTP id k14so2991041iea.27 for ; Thu, 14 Mar 2013 06:38:13 -0700 (PDT) X-Received: by 10.50.119.67 with SMTP id ks3mr2110123igb.90.1363268293263; Thu, 14 Mar 2013 06:38:13 -0700 (PDT) X-Original-Return-Path: Received: from [10.250.7.177] (102.sub-174-254-241.myvzw.com. [174.254.241.102]) by mx.google.com with ESMTPS id ip2sm7634962igc.5.2013.03.14.06.38.10 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 14 Mar 2013 06:38:12 -0700 (PDT) Subject: Re: [LML] Re: Pressurization References: From: Todd Long Content-Type: multipart/alternative; boundary=Apple-Mail-1372D687-9A1F-486A-8DAB-B6BEDEB77E24 X-Mailer: iPhone Mail (10B146) In-Reply-To: X-Original-Message-Id: X-Original-Date: Thu, 14 Mar 2013 08:39:38 -0500 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-1372D687-9A1F-486A-8DAB-B6BEDEB77E24 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Do you take off with the cabin air open? In the summer the AC keeps it nice a= nd cool inside, so I don't have a problem with temperature. But I have alway= s had to take off with the cabin air 100% off and then a little while after t= ake off very very very slowly start to open it. I bought this airplane used.= I noticed the vacuum line is And there is no switch connected to the gear f= or pressurization. Is a tee and a check valve still the preferred method to= create vacuum for the system on an all electric airplane? Typing and grammar errors courtesy of Siri and the iPhone. On Mar 14, 2013, at 8:30, vtailjeff@aol.com wrote: > The system should be set so that the aircraft is unpressurized on deck-- u= sually through a gear down (ivp) or weight on wheels switch (Evo). This is t= o protect the pressure vessel. >=20 > Jeff >=20 > Sent from my iPad >=20 > On Mar 14, 2013, at 6:26 AM, Ronald STEVENS wrote: >=20 >> Yes this I do not understand, my AC and pressurization is on after I star= t the plane and stops when I stop the engine, and my cabin is cool and fine l= ike this. >>=20 >> Ronald Stevens >> 786-338 1678 >>=20 >>=20 >> On Mar 14, 2013, at 7:58 AM, David Weinsweig wrote= : >>=20 >>> I don't pressurize until I get up to 6-8,000 ft. This keeps my cabin a b= it cooler and comfortable at low altitude and doesn't steal power when it's n= eeded most ie on takeoff and early climb out. Do others do it differently? >>>=20 >>> David Weinsweig >>> N750DW Propjet >>>=20 >>> From: Todd Long >>> Sender: >>> Subject: Re: [LML] Re: vacuum hose >>> Date: Wed, 13 Mar 2013 17:09:25 -0400 >>> To: lml@lancaironline.net >>>=20 >>>=20 >>>=20 >>> On take off the other day I was up to 2 Psid by the time I went wheels u= p. That was with the gold box 95% closed. Does anyone happen to have a dukes= manual? >>>=20 >>> Typing and grammar errors courtesy of Siri and the iPhone. >>>=20 >>> On Mar 13, 2013, at 14:14, Colyn Case wrote: >>>=20 >>> > If you have a vacuum system, you can hook that up. >>> > If you don't, you can buy a small pump and hook that up. I haven't d= one the latter but I've heard the door seal pump works okay for this applica= tion. >>> >=20 >>> > Using that main vac pump almost completely eliminates the cabin pressu= re increase at takeoff. >>> >=20 >>> > On Mar 13, 2013, at 1:21 PM, Todd Long wrote: >>> >=20 >>> > How do most of you operate the pressurization system to avoid the majo= r bumps at takeoff? My vacuum line was capped.=20 >>> >=20 >>> > Typing and grammar errors courtesy of Siri and the iPhone. >>> >=20 >>> > On Mar 13, 2013, at 10:56, Paul Miller wrote: >>> >=20 >>> >> Autozone, lots of smaller sizes for vacuum hose by the foot. >>> >> On 2013-03-13, at 10:51 AM, Colyn Case wrot= e: >>> >>=20 >>> >>> I'm looking for a minimum thickness vacuum hose just to hold the duk= es pressurization valve open on takeoff. Right now I have a 1/4" i.d. .64" o= .d. big fat rubber line. I don't see anything on McMaster Carr that is th= inner wall. But given it probably needs to handle maybe 10 psi of vacuum, t= he big fat rubber hoses seem like overkill. >>> >>=20 >>> >>=20 >>> >> -- >>> >> For archives and unsub http://mail.lancaironline.net:81/lists/lml/Lis= t.html >>> >=20 >>> > -- >>> > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List= .html >>> >=20 >>> >=20 >>> > -- >>> > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List= .html >>>=20 >>> Sent from my iPad --Apple-Mail-1372D687-9A1F-486A-8DAB-B6BEDEB77E24 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Do you take off with the cabin air ope= n? In the summer the AC keeps it nice and cool inside, so I don't have a pro= blem with temperature. But I have always had to take off with the cabin air 1= 00% off and then a little while after take off very very very slowly start t= o open it. I bought this airplane used. I noticed the vacuum line is And the= re is no switch connected to the gear for pressurization. Is a tee  and= a check valve still the preferred method to create vacuum for the system on= an all electric airplane?

Typing and grammar errors courtesy of Siri= and the iPhone.

On Mar 14, 2013, at 8:30, vtailjeff@aol.com wrote:

The system should be set so that the aircraft is unpress= urized on deck-- usually through a gear down (ivp) or weight on wheels switc= h (Evo). This is to protect the pressure vessel.

Je= ff

Sent from my iPad

On Mar 14, 2013, at 6:26 AM, Ronal= d STEVENS <Ronald@sdc.com> wrote= :

Yes this I do not= understand, my AC and pressurization is on after I start the plane and stop= s when I stop the engine, and my cabin is cool and fine like this.

Ro= nald Stevens
786-338 1678


On Mar 14, 2= 013, at 7:58 AM, David Weinsweig <weinsweigd@gmail.com> wrote:

=
I don't pressurize until I get up to 6-8,000 ft. This k= eeps my cabin a bit cooler and comfortable at low altitude and doesn't steal= power when it's needed most ie on takeoff and early climb out. Do others do= it differently?

David Weinsweig
N750DW P= ropjet

Sender:Re: [LML] Re: vacuum hose=
= From:Todd Long <toddlong1@gmail.com>
<marv@lancaironline.net&= gt;
Subject:
Date:Wed, 13 Mar 2013 17:09:25 -0400
To:lml@lancaironline.net
3D"Message<= br>
3D"Undecod=
On take off the other d= ay I was up to 2 Psid by the time I went wheels up. That was with the gold b= ox 95% closed. Does anyone happen to have a dukes manual?

Typing and g= rammar errors courtesy of Siri and the iPhone.

On Mar 13, 2013, at 14= :14, Colyn Case <colyncase@ear= thlink.net> wrote:

> If you have a vacuum system, you can h= ook that up.
> If you don't, you can buy a small pump and hook that up= .   I haven't done the latter but I've heard the door seal pump works o= kay for this application.
> 
> Using that main vac pump alm= ost completely eliminates the cabin pressure increase at takeoff.
>&nb= sp;
> On Mar 13, 2013, at 1:21 PM, Todd Long wrote:
> 
&= gt; How do most of you operate the pressurization system to avoid the major b= umps at takeoff? My vacuum line was capped. 
> 
> Typi= ng and grammar errors courtesy of Siri and the iPhone.
> 
>= On Mar 13, 2013, at 10:56, Paul Miller <pjdmiller@gmail.com> wrote:
> 
>> Autozone= , lots of smaller sizes for vacuum hose by the foot.
>> On 2013-03-= 13, at 10:51 AM, Colyn Case <c= olyncase@earthlink.net> wrote:
>> 
>>> I'm l= ooking for a minimum thickness vacuum hose just to hold the dukes pressuriza= tion valve open on takeoff.  Right now I have a 1/4" i.d. .64" o.d. big= fat rubber line.    I don't see anything on McMaster Carr that is= thinner wall.  But given it probably needs to handle maybe 10 psi of v= acuum, the big fat rubber hoses seem like overkill.
>> 
>= ;> 
>> --
>> For archives and unsub http://mail.lancaironline.= net:81/lists/lml/List.html
> 
> --
> For archives= and unsub = http://mail.lancaironline.net:81/lists/lml/List.html
> 
&g= t; 
> --
> For archives and unsub http://mail.lancaironline.net:81/lis= ts/lml/List.html

Sent from my iPad = --Apple-Mail-1372D687-9A1F-486A-8DAB-B6BEDEB77E24--