X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 20 Jul 2010 18:31:09 -0400 Message-ID: X-Original-Return-Path: Received: from fmailhost05.isp.att.net ([204.127.217.105] verified) by logan.com (CommuniGate Pro SMTP 5.3.8) with ESMTP id 4400413 for lml@lancaironline.net; Tue, 20 Jul 2010 17:37:52 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.105; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-85-142-250.mco.bellsouth.net[98.85.142.250]) by isp.att.net (frfwmhc05) with SMTP id <20100720213715H0500hnm89e>; Tue, 20 Jul 2010 21:37:16 +0000 X-Originating-IP: [98.85.142.250] From: "Bill Bradburry" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Re: My airplane is running HOT X-Original-Date: Tue, 20 Jul 2010 17:37:17 -0400 X-Original-Message-ID: <43148FD413704F40B2AC228E2E523A6B@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0032_01CB2832.33857050" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcsoKtzmDoiRiw7PRLq+yY9aWDGHNAAKBFLA X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_0032_01CB2832.33857050 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit The gage is called a magnehelic gage. You can find all kinds of them pretty cheaply if you put that word in a search in Ebay. They come in different ranges. You need to consider what range you are looking to test before you purchase. Here is one that has 5.5 hours left on it, new in the box for currently $10 plus shipping. http://cgi.ebay.com/ebaymotors/Dwyer-Magnehelic-Pressure-Gage-gauge-2010-NO- RES-/280534237301?cmd=ViewItem &pt=Motors_Automotive_Tools&hash=item415124c075 Bill B _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Don Karich Sent: Tuesday, July 20, 2010 12:45 PM To: lml@lancaironline.net Subject: [LML] Re: My airplane is running HOT To check differential pressure in flight: I got a differential pressure guage from mcmaster-carr and ran two tubes from the cockpit to a spot just before and just after the oil cooler. During flight the instrument will read out the pressure difference. simple On Tue, Jul 20, 2010 at 4:57 AM, Bryan Wullner wrote: Thank you guys for all the suggestions. How would I check the differential pressures in the cowling inflight? Craig, the oil cooler I have now is a vans aircraft 7 vane cooler. I have a feeling its not doing the job needed. I have a stewart warner 9 vane cooler I will be switching too. So for now, oil cooler changed, Vernatherm will be checked and then I will go from there. Bryan On Mon, Jul 19, 2010 at 3:15 AM, Don Karich wrote: you could check the differential pressure before and after the plenum. should be about 5 inches of difference. If this is the case, i'd replace the vernotherm first. Mine was brand new and i did everything possi ble including adding a second oil cooler. my temps were 230 and the 2nd oil cooler brought them down a little but after changing the vernatherm i now have 180 to 205. It follows amb ient . I have a IO-540 from performance and my vernotherm was new. On Sun, Jul 18, 2010 at 10:47 AM, Craig Schulze wrote: Hi Bryan, I have seen your airplane and I do not think you have an exit problem. You have plenum from Chris Z, so you are great there. Can you verify for sure that your probes are all calibrated and reading the proper temp? And on the subject of fuel flow, my little 320 needs 12.5 gph or better in the climb and sometimes it will still get hot when its this hot out. You should be 18 gph on take off and at least 14 on climb. Keep your climb speed at 150kts or better on these hot days too. What brand oil cooler are you using? I switched mine to a dual pass Stewart Warner and it made a big difference. Can you send me a picture of the bottom baffling around the cylinders? Something could be off there. Craig Schulze From: Bill Bradburry [mailto:bbradburry@bellsouth.net] Sent: Saturday, July 17, 2010 4:44 PM To: lml@lancaironline.net Subject: RE: [LML] Re: My airplane is running HOT Check the air pressure in flight above the cylinders and compare it to the air pressure below the cylinders. You may find that you need to add a cowl flap. At least you can see how the air is moving thru the cowl in flight. That will go a long way to solving the problem. Bill B _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Bryan Wullner Sent: Saturday, July 17, 2010 2:41 PM To: lml@lancaironline.net Subject: [LML] Re: My airplane is running HOT Exit area is standard 360 cowling exit. Can see why it would behave any different than any other lancair out there. Its actually a pretty good size opening. On Fri, Jul 16, 2010 at 8:21 PM, wrote: Posted for Bryan Wullner : Anybody have any ideas or advice for the following situation: Lancair 360 with carbed 360 (180hp) engine. 475 hours on it about. Chrome Cylinders. I have a Plenum cooling system and larger cowling inlets. (Zavatson's cowling and plenum system) Oil cooler is mounted at the front inlet. Oil wont cool in climb and will go up to 230 and probably higher if not stabilized. CHT's are all hot in climbs and will go to 440 no problem. Cant figure it out. Motor runs great, compression good, boroscoped fine, mag timing good. All leaks in plenum or baffling are sealed. Probes were checked out ok. Only thing I haven't checked is the vernotherm. Thanks for any advice. Bryan [How big are your cooling air outlets and where are they located? Sounds like you're getting the cooling air in but not letting it out. Just a thought. ] -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html ------=_NextPart_000_0032_01CB2832.33857050 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

The gage is called a magnehelic = gage.  You can find all kinds of them pretty cheaply if you put that word in a = search in Ebay.  They come in different ranges.  You need to consider = what range you are looking to test before you purchase.

 

Here is one that has 5.5 hours left = on it, new in the box for currently $10 plus = shipping…

 

http://cgi.ebay.com/ebaymotors/Dwyer-Magne= helic-Pressure-Gage-gauge-2010-NO-RES-/280534237301?cmd=3DViewItem&pt= =3DMotors_Automotive_Tools&hash=3Ditem415124c075

 

Bill B

From: = Lancair Mailing List = [mailto:lml@lancaironline.net] On Behalf Of Don Karich
Sent: Tuesday, July 20, = 2010 12:45 PM
To: = lml@lancaironline.net
Subject: [LML] Re: My = airplane is running HOT

 

To check = differential pressure in flight: I got a differential pressure guage from = mcmaster-carr and ran two tubes from the cockpit to a spot just before and just after the = oil cooler. During flight the instrument will read out the pressure = difference. simple

On Tue, Jul 20, 2010 at 4:57 AM, Bryan Wullner <vonjet@gmail.com> = wrote:

Thank you guys for all the suggestions. =

How would I check the differential pressures in the cowling inflight? 

 

Craig, the oil cooler I have now is a vans aircraft 7 vane = cooler. I have a feeling its not doing the job needed. I have a stewart warner 9 = vane cooler I will be switching too.

 

So for now, oil cooler changed, Vernatherm will be checked = and then I will go from there.

 

Bryan

 

On Mon, Jul 19, 2010 at 3:15 AM, Don Karich <donkarich@gmail.com> wrote:

you could = check the differential pressure before and after the plenum. should be about  = 5 inches of difference. If this is the case,  i'd replace the = vernotherm first. Mine was brand new and i did everything possi ble including = adding  a second oil cooler. my temps were 230 and the 2nd oil cooler brought = them down a little but after changing the  vernatherm i now have 180 to 205. = It follows amb ient . I have a IO-540 from performance and my vernotherm = was new.

On Sun, Jul 18, 2010 at 10:47 AM, Craig Schulze <craig@skybolt.net> wrote:

Hi Bryan,

 

I have seen your airplane and I do not think you have an = exit problem.  You have plenum from Chris Z, so you are great = there.  Can you verify for sure that your probes are all calibrated and reading the = proper temp?  And on the subject of fuel flow, my little 320 needs 12.5 = gph or better in the climb and sometimes it will still get hot when its this = hot out. You should be 18 gph on take off and at least 14 on climb. Keep your = climb speed at 150kts or better on these hot days too.  What brand oil cooler = are you using?  I switched mine to a dual pass Stewart Warner and it made a = big difference.  Can you send  me a picture of the bottom baffling = around the cylinders?  Something could be off there.  =

 

Craig Schulze

 

 

From: Bill Bradburry [mailto:bbradburry@bellsouth.net]
Sent: Saturday, July 17, = 2010 4:44 PM
To: lml@lancaironline.net
Subject: RE: [LML] Re: My = airplane is running HOT

 

Check the air pressure in flight above the cylinders and = compare it to the air pressure below the cylinders.  You may find that you = need to add a cowl flap.  At least you can see how the air is moving thru = the cowl in flight.  That will go a long way to solving the = problem.

 

Bill B

 

From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Bryan Wullner
Sent: Saturday, July 17, = 2010 2:41 PM
To: lml@lancaironline.net
Subject: [LML] Re: My = airplane is running HOT

 

Exit = area is standard 360 cowling exit. Can see why it would behave any different = than any other lancair out there. Its actually a pretty good size = opening.

 

 

On = Fri, Jul 16, 2010 at 8:21 PM, <marv@lancair.net> wrote:

Posted for Bryan Wullner <vonjet@gmail.com>:

 Anybody have any ideas or advice for the following situation:
 
 Lancair 360 with carbed 360 (180hp) engine. 475 hours on it about. = Chrome
 Cylinders. I have a Plenum cooling system and larger cowling = inlets.
 (Zavatson's cowling and plenum system)
 Oil cooler is mounted at the front = inlet.


 Oil wont cool in climb and will go up to 230 and probably higher = if not
 stabilized. CHT's are all hot in climbs and will go to 440 no = problem. Cant
 figure it out.

 Motor runs great, compression good, boroscoped fine, mag = timing good. All
 leaks in plenum or baffling are sealed.
 Probes were checked out ok.
 
 Only thing I haven't checked is the vernotherm.
 
 Thanks for any advice.
 Bryan

[How big are your cooling air outlets and where are they located?  = Sounds like you're getting the cooling air in but not letting it out.  = Just a thought.  <Marv>  ]

 

 

 

 

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