X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 09 Sep 2013 07:54:44 -0400 Message-ID: X-Original-Return-Path: Received: from webmail.emmett.org ([75.147.240.42] verified) by logan.com (CommuniGate Pro SMTP 6.0.6) with ESMTPS id 6459864 for lml@lancaironline.net; Mon, 09 Sep 2013 07:53:20 -0400 Received-SPF: unknown receiver=logan.com; client-ip=75.147.240.42; envelope-from=sbuller@emmett.org Received: from EMMETTSERVER.emmett.local ([fe80::3914:271a:9fbf:ccce]) by EMMETTSERVER.emmett.local ([fe80::3914:271a:9fbf:ccce%10]) with mapi id 14.01.0438.000; Mon, 9 Sep 2013 07:51:56 -0400 From: Steve Buller X-Original-To: Lancair Mailing List Subject: RE: [LML] MORE more on IVP pressurization Thread-Topic: [LML] MORE more on IVP pressurization Thread-Index: AQHOrAOP2KZLimS2LEa7pasKYD2I3pm9TFRg X-Original-Date: Mon, 9 Sep 2013 11:51:55 +0000 X-Original-Message-ID: <144B9F97D0F6E34980160899EF1014E9708DB2AC@EMMETTSERVER.emmett.local> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.10.240.26] x-avast-antispam: clean, score=2 x-original-content-type: application/ms-tnef Content-Type: multipart/alternative; boundary="_000_144B9F97D0F6E34980160899EF1014E9708DB2ACEMMETTSERVERemm_" MIME-Version: 1.0 --_000_144B9F97D0F6E34980160899EF1014E9708DB2ACEMMETTSERVERemm_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable On the subject of IVP pressurization.... If anyone needs parts, I have a c= omplete IVP kit that I'm building as a IV and have most all of the "P" part= s available at =BD of new... still in original packaging. If interested, p= lease contact me off line... 269-209-5841 Steve Buller Kit # LIVP 399 From: PETER WILLIAMS [mailto:peterpawaviation@hotmail.com] Sent: Saturday, September 07, 2013 3:51 PM To: lml@lancaironline.net Subject: [LML] MORE more on IVP pressurization J DO YOU HAVE THE ALTITUDE CONTROLLER SET FOR SEA LEVEL? YOOSE GOTS LEAKS have you check the validity of the cabin interior pressure gage? i am not expert in how to trouble shoot the system, but here would be my ap= proach. start: 1. check turbo connections to cabin 2. integrity of valve under the rear seat 3. accuracy of controller and indicators on dash 4. door seal/system (my plane needed re contouring of door jamb) 5. seal at rear of cabin behind the seat (this came loose on my plane and h= ad never been correctly attached) 6. door strut can cause a problem with hinges and the lifting of door by th= e roof (rearrange strut- not yet done in mine) 7. at 14,000 feet, how many inches of manifold could you show (engine/turbo= issue) that really is a genaric list of how to proceed; but it gives you a sense o= f how to break down the problem into solvable problems the work was done by Matthew at Fibercraft in Spruce Creek, FLA hope the advise is a help p To: lml@lancaironline.net Date: Fri, 6 Sep 2013 11:31:40 -0400 From: jbarrett@carbinge.com Subject: [LML] Re: more on IVP pressurization Peter, Have been to 14K so far. I get about 11K cabin pressure. John From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of PETE= R WILLIAMS Sent: Friday, September 06, 2013 4:54 AM To: lml@lancaironline.net Subject: [LML] more on IVP pressurization john have you flown the airplane at altitude? after a bunch of work on sealing my 4P i have a 3,800' cabin at 17,500 with 32" and 2300rpm i have the altitude set at 1,000 feet; where it should be if i am returni= ng to sea level peter > To: lml@lancaironline.net > Date: Wed, 4 Sep 2013 07:42:10 -0400 > From: 2thman1@gmail.com > Subject: [LML] IVP pressurization > > Having trouble getting my pressurization to work effectively. > I did my best to seal the pressure vessel but never got above .25 PSID wi= th my 6 horse shop vac. Used both pressure and vacuum to check for leaks. N= o smoke but used a down feather and then a stethoscope with tympanic membra= ne removed. Outflow valve is covered during these tests. > > After lots of frustration i hired a guy who has built and/or pressurized = about a dozen IVPs to come take a look. He determined using smoke that ther= e were a couple of slight improvements to be made mostly in the wire bundle= s through the aft pressure bulkhead and after doing this he declared the ve= ssel seal very good. > > So we deduced that maybe the shop vac is not as efficient at blowing air = as I thought, but my flying experience with the aircraft is that it doesn't= do much better than the .25 PSID in flight up to 14.5K ft. > > Wondering why there is inadequate pressurization with a good pressure ves= sel leads to thoughts of outflow valve problems. I bought the device with t= he kit in 1996 so it occurs to me the valve could be dirty or rubber diaphr= agm could be failing, etc. I removed the outflow valve yesterday and tried = to examine the parts. i lubricated the mandrel that the poppet valve slides= on with a very small spritz of LPS1 lubricant in case there was stiction t= here. I did notice that with the poppet valve manually moved to the furthes= t closed position the diaphragm still had somewhere around a 1/32" gap at t= he seating perimeters. Should the air pressure in flight fill that diaphrag= m to close the gap or does this indicate the valve needs servicing? > > Finally is there a way short of the manual dump switch to keep the system= from pressurizing better than what I see by mismanaging the controller? Am= I just setting the pressurization up wrong? Have only been up to 3,000 ft = elevation airports, (KRDM) and lower - most at sea level. > > Thanks for any help. > > John Barrett > > Sent from my iPad > > -- > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.ht= ml --_000_144B9F97D0F6E34980160899EF1014E9708DB2ACEMMETTSERVERemm_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

On the subject of IVP pre= ssurization….  If anyone needs parts, I have a complete IVP kit = that I’m building as a IV and have most all of the “P” pa= rts available at =BD of new… still in original packaging.  If interested, ple= ase contact me off line… 269-209-5841

 <= /p>

 

 

Steve  Buller

Kit # LIVP 399

 <= /p>

From: PETER WI= LLIAMS [mailto:peterpawaviation@hotmail.com]
Sent: Saturday, September 07, 2013 3:51 PM
To: lml@lancaironline.net
Subject: [LML] MORE more on IVP pressurization

 

J

DO YOU HAVE THE ALTITUDE CONTROLLER SET FOR SEA LEVEL?

YOOSE GOTS LEAKS

have you check the validity of the cabin interior pressure gage?
i am not expert in how to trouble shoot the system, but here would be my ap= proach.
start:
1. check turbo connections to cabin
2. integrity of valve under the rear seat
3. accuracy of controller and indicators on dash
4. door seal/system (my plane needed re contouring of door jamb)
5. seal at rear of cabin behind the seat (this came loose on my plane and h= ad never been correctly attached)
6. door strut can cause a problem with hinges and the lifting of door by th= e roof (rearrange strut- not yet done in mine)
7. at 14,000 feet, how many inches of manifold could you show (engine/turbo= issue)

that really is a genaric list of how to proceed; but it gives you a sense o= f how to break down the problem into solvable problems

the work was done by Matthew at Fibercraft in Spruce Creek, FLA

hope the advise is a help

p

To: lml@lancaironline.net
Date: Fri, 6 Sep 2013 11:31:40 -0400
From: jbarrett@carbinge.com Subject: [LML] Re: more on IVP pressurization

Peter,

 

Have been to 14K so far.&= nbsp; I get about 11K cabin pressure.

 

John=

 

From: Lancair = Mailing List [mailto:lml@lancairon= line.net] On Behalf Of PETER WILLIAMS
Sent: Friday, September 06, 2013 4:54 AM
To: lml@lancaironline.net
Subject: [LML] more on IVP pressurization

 

john

have you flown the airplane at altitude?

after a bunch of work on sealing my 4P i have a 3,800' cabin at 17,500
with 32" and 2300rpm
  i have the altitude set at 1,000 feet; where it should be if i am re= turning to sea level

peter

> To: lml@lancaironline.net
> Date: Wed, 4 Sep 2013 07:42:10 -0400
> From: 2thman1@gmail.com
> Subject: [LML] IVP pressurization
>
> Having trouble getting my pressurization to work effectively.
> I did my best to seal the pressure vessel but never got above .25 PSID= with my 6 horse shop vac. Used both pressure and vacuum to check for leaks= . No smoke but used a down feather and then a stethoscope with tympanic mem= brane removed. Outflow valve is covered during these tests.
>
> After lots of frustration i hired a guy who has built and/or pressuriz= ed about a dozen IVPs to come take a look. He determined using smoke that t= here were a couple of slight improvements to be made mostly in the wire bun= dles through the aft pressure bulkhead and after doing this he declared the vessel seal very good.
>
> So we deduced that maybe the shop vac is not as efficient at blowing a= ir as I thought, but my flying experience with the aircraft is that it does= n't do much better than the .25 PSID in flight up to 14.5K ft.
>
> Wondering why there is inadequate pressurization with a good pressure = vessel leads to thoughts of outflow valve problems. I bought the device wit= h the kit in 1996 so it occurs to me the valve could be dirty or rubber dia= phragm could be failing, etc. I removed the outflow valve yesterday and tried to examine the parts. i lubricated t= he mandrel that the poppet valve slides on with a very small spritz of LPS1= lubricant in case there was stiction there. I did notice that with the pop= pet valve manually moved to the furthest closed position the diaphragm still had somewhere around a 1/32&q= uot; gap at the seating perimeters. Should the air pressure in flight fill = that diaphragm to close the gap or does this indicate the valve needs servi= cing?
>
> Finally is there a way short of the manual dump switch to keep the sys= tem from pressurizing better than what I see by mismanaging the controller?= Am I just setting the pressurization up wrong? Have only been up to 3,000 = ft elevation airports, (KRDM) and lower - most at sea level.
>
> Thanks for any help.
>
> John Barrett
>
> Sent from my iPad
>
> --
> For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html<= /p>

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