X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 20 Jul 2010 12:44:35 -0400 Message-ID: X-Original-Return-Path: Received: from mail-gx0-f180.google.com ([209.85.161.180] verified) by logan.com (CommuniGate Pro SMTP 5.3.8) with ESMTP id 4399870 for lml@lancaironline.net; Tue, 20 Jul 2010 10:09:29 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.180; envelope-from=donkarich@gmail.com Received: by gxk22 with SMTP id 22so2779765gxk.25 for ; Tue, 20 Jul 2010 07:08:53 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=FiyS/dTt9GwfNhMzt82rq0EQgl2qDHu8rvK6l8A80JyHrx5WLzW58pPhoOv6UJTq+H dDKcGHX3tCCjq2BXN4ZDvt8KOecID++4REhMZfMadX1oZXI0qUEZlHGkMbi9YV175Rp5 TkK5K/1itU9oh5BshBz0D0MXAEZ5E/zLN4i6Y= MIME-Version: 1.0 Received: by 10.150.141.11 with SMTP id o11mr350014ybd.327.1279634933162; Tue, 20 Jul 2010 07:08:53 -0700 (PDT) Received: by 10.231.143.134 with HTTP; Tue, 20 Jul 2010 07:08:52 -0700 (PDT) In-Reply-To: References: X-Original-Date: Tue, 20 Jul 2010 07:08:52 -0700 X-Original-Message-ID: Subject: Re: [LML] Re: My airplane is running HOT From: Don Karich X-Original-To: Lancair Mailing List Content-Type: multipart/alternative; boundary=000e0cdf16f8a221f4048bd23925 --000e0cdf16f8a221f4048bd23925 Content-Type: text/plain; charset=ISO-8859-1 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 >>> >>> >>> >> >> > --000e0cdf16f8a221f4048bd23925 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable To check differential pressure in flight: I got a differential pressure gua= ge from mcmaster-carr and ran two tubes from the cockpit to a spot just bef= ore and just after the oil cooler. During flight the instrument will read o= ut the pressure difference. simple

On Tue, Jul 20, 2010 at 4:57 AM, Bryan Wullner <= span dir=3D"ltr"><vonjet@gmail.com> wrote:
Thank you guys for all the sugge= stions.=20
How would I check the differential pressures in the cowling inflight?= =A0

Craig, the oil cooler I have now is a vans aircraft 7 vane cooler. I h= ave 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,=A0Vernatherm 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=A0 5 inches of diffe= rence. If this is the case,=A0 i'd replace the vernotherm first. Mine w= as brand new and i did everything possi ble including adding=A0 a second oi= l cooler. my temps were 230 and the 2nd oil cooler brought them down a litt= le but after changing the=A0 vernatherm i now have 180 to 205. It follows a= mb 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 B= ryan,

=A0<= /span>

I ha= ve seen your airplane and I do not think you have an exit problem.=A0 You h= ave plenum from Chris Z, so you are great there.=A0 Can you verify for sure= that your probes are all calibrated and reading the proper temp?=A0 And on= the subject of fuel flow, my little 320 needs 12.5 gph or better in the cl= imb and sometimes it will still get hot when its this hot out. You should b= e 18 gph on take off and at least 14 on climb. Keep your climb speed at 150= kts or better on these hot days too.=A0 What brand oil cooler are you using= ?=A0 I switched mine to a dual pass Stewart Warner and it made a big differ= ence.=A0 Can you send=A0 me a picture of the bottom baffling around the cyl= inders?=A0 Something could be off there.=A0

=A0<= /span>

Crai= g Schulze

=A0<= /span>

=A0<= /span>

From:<= span style=3D"FONT-SIZE: 10pt"> Bill Bradburry [mailto:bbradburry@bellsouth.net] Sent: Saturday, July 17, 2010 4:44 PM
To: lml@l= ancaironline.net
Subject: RE: [LML] Re: My airplane is runnin= g HOT

=A0

Check t= he air pressure in flight above the cylinders and compare it to the air pre= ssure below the cylinders.=A0 You may find that you need to add a cowl flap= .=A0 At least you can see how the air is moving thru the cowl in flight.=A0= That will go a long way to solving the problem.

=A0

Bill B<= /span>

=A0

From:<= span style=3D"FONT-SIZE: 10pt"> 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

=A0

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

=A0

=A0

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

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

=A0Anybody have any idea= s or advice for the following situation:
=A0
=A0Lancair 360 with carbed 360 (180hp) engine. 475 hours on it about= . Chrome
=A0Cylinders. I have a Plenum cooling system and larger cowling= inlets.
=A0(Zavatson's cowling and plenum system)
=A0Oil cooler = is mounted at the front inlet.


=A0Oil wont cool in climb and will go up to 230 and probably highe= r if not
=A0stabilized. CHT's are all hot in climbs and will go to 4= 40 no problem. Cant
=A0figure it out.
=A0Motor runs great, comp= ression good, boroscoped fine, mag timing good. All
=A0leaks in plenum or baffling are sealed.
=A0Probes were checked out ok= .
=A0
=A0Only thing I haven't checked is the vernotherm.
=A0=A0Thanks for any advice.
=A0Bryan

[How big are your cooling ai= r outlets and where are they located?=A0 Sounds like you're getting the= cooling air in but not letting it out.=A0 Just a thought.=A0 <Marv>= =A0 ]=20

=A0



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