X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 29 Jul 2013 11:23:26 -0400 Message-ID: X-Original-Return-Path: Received: from mailrelay.embarq.synacor.com ([208.47.184.3] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTP id 6394971 for lml@lancaironline.net; Mon, 29 Jul 2013 10:25:28 -0400 Received-SPF: pass receiver=logan.com; client-ip=208.47.184.3; envelope-from=liegner@embarqmail.com X-Original-Return-Path: X_CMAE_Category: 0,0 Undefined,Undefined X-CNFS-Analysis: v=2.1 cv=eunmkOZX c=1 sm=0 tr=0 a=/R/zUYZ2SYUMtUkAAXf3sQ==:117 a=/R/zUYZ2SYUMtUkAAXf3sQ==:17 a=K-v-2zaBAAAA:8 a=GlaX8V249pIA:10 a=1poGYrevpj8A:10 a=1oqGTYSLAAAA:8 a=kitc4VL0VNYA:10 a=doupyKFmAAAA:8 a=Ia-xEzejAAAA:8 a=wnCEsUbclLaj8vdr5mMA:9 a=8y7gihapCMa29MHo:21 a=u-OoMTtMsl_rGxX4:21 a=wPNLvfGTeEIA:10 a=f9IQpo0QPSAA:10 a=0vUscowIxtUA:10 a=EzXvWhQp4_cA:10 a=H26aCPtrdm7NkAqKUV4A:9 a=FhdGBA_Wm88i6lv2:21 a=cJrTP2krB7SkpvCX:21 a=Jbq6OEK33dfXJ7GC:21 a=_W_S_7VecoQA:10 X-CM-Score: 0 X-Scanned-by: Cloudmark Authority Engine Authentication-Results: smtp04.embarq.synacor.com smtp.user=liegner; auth=pass (LOGIN) Received: from [24.229.41.52] ([24.229.41.52:23923] helo=[192.168.1.130]) by mailrelay.embarq.synacor.com (envelope-from ) (ecelerity 2.2.3.49 r(42060/42061)) with ESMTPSA (cipher=AES128-SHA) id 45/08-26888-43B76F15; Mon, 29 Jul 2013 10:24:52 -0400 Subject: Re: IVP Pressurized Door Seal and A/C Fans Mime-Version: 1.0 (Apple Message framework v1283) Content-Type: multipart/alternative; boundary="Apple-Mail=_5854DCE7-4074-45F9-B3A8-462B3FE605D3" From: Jeffrey Liegner In-Reply-To: X-Original-Date: Mon, 29 Jul 2013 10:24:51 -0400 X-Original-Cc: "Denis Conkey" X-Original-Message-Id: <89BA22B3-5566-487A-9879-C074B3DF5EDF@embarqmail.com> References: X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.1283) --Apple-Mail=_5854DCE7-4074-45F9-B3A8-462B3FE605D3 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1 Denis, My cycle time is maybe once every minute or two, a very brief "sip" seen = on the status light. The door seal might be leaking behind the adhesive = part (against the door frame), not easily detected with soap bubbles; = that is the right way to find it, but you almost have to immerse the = door with a very soap washcloth. =20 You are correct that the pump might be the problem, a back leak inside = the mechanism. Over the last couple years, I have changed the pump = twice to solve mystery leaks or inadequate pressurization. They are = cheap and easy to replace. You can test the pump by placing a known sealed container (or bladder) = on the outlet and letting it pressurized it, then remove power and = observe if it leaks back through the pump. The cabin fan should be quiet. I often fail to hear it when I shut = down, creating an added drain on the battery. Hope this helps. Jeff L LIVP in New Jersey On Jul 29, 2013, at 6:01 AM, Lancair Mailing List wrote: > From: "Denis Conkey" > Subject: IVP Pressurized Door Seal and A/C Fans > Date: July 28, 2013 10:57:11 PM EDT > To: lml@lancaironline.net >=20 >=20 > I know many of you have experience flying with the pressurized IV. = How > often should the door seal pump engage after the pressure is up on the = Seal? > Ours seems to have a very short cycle "on" about every 5-8 second. = The pump > runs a second or less when it cycles on. Not having experience with = the > pump, seems like the cycle time should be a bit more than that which = might > be indicative of a slow leak. We have checked for leaks in all our = tube > connections using soap bubbles and could not identify any leaks. What = is a > good way to check for leaks? Is it possible for the pump to be = leaking > internally? Any advice on this topic would be much appreciated. =20 >=20 > We have an air conditioner unit and the fans in the cabin that draw in = the > air are very noisy. They are 4 inch Attwood Turbo 4000 fans. These = fans > are estimated to be more than 5-6 years old but used very little. I = noticed > that Attwood has a Series II fan that might be quieter. Are there = other > options for fans that are not quite so noisy. These will drive any = backseat > passenger crazy and I fear will be quite noisy in the front as well. = If you > know of any other 4 inch fans that would be well suited for this = purpose or > if the Series II fans are better, please let us know. >=20 > Thanks, >=20 > Denis Conkey/Jim Thompson > Lancair IVPT - N750PJ > 805-402-6197 >=20 --Apple-Mail=_5854DCE7-4074-45F9-B3A8-462B3FE605D3 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=iso-8859-1

You are correct that the pump might be = the problem, a back leak inside the mechanism.  Over the last = couple years, I have changed the pump twice to solve mystery leaks or = inadequate pressurization.  They are cheap and easy to = replace.

You can test the pump by placing a known = sealed container (or bladder) on the outlet and letting it pressurized = it, then remove power and observe if it leaks back through the = pump.

The cabin fan should be quiet.  I = often fail to hear it when I shut down, creating an added drain on the = battery.

Hope this = helps.

Jeff L
LIVP in New = Jersey



On Jul = 29, 2013, at 6:01 AM, Lancair Mailing List wrote:

To: runs a second or less when it cycles on. =  Not having experience with the
pump, seems like the cycle time = should be a bit more than that which might
be indicative of a slow = leak.  We have checked for leaks in all our tube
connections = using soap bubbles and could not identify any leaks.  What is = a
good way to check for leaks?  Is it possible for the pump to = be leaking
internally?  Any advice on this topic would be much = appreciated.  

We have an air conditioner unit and the fans = in the cabin that draw in the
air are very noisy.  They are 4 = inch Attwood Turbo 4000 fans.  These fans
are estimated to be = more than 5-6 years old but used very little.  I noticed
that = Attwood has a Series II fan that might be quieter.  Are there = other
options for fans that are not quite so noisy.  These will = drive any backseat
passenger crazy and I fear will be quite noisy in = the front as well.  If you
know of any other 4 inch fans that = would be well suited for this purpose or
if the Series II fans are = better, please let us know.

Thanks,

Denis Conkey/Jim = Thompson
Lancair IVPT - = N750PJ
805-402-6197


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