X-Junk-Score: 0 [] X-KAS-Score: 0 [] From: "David Leonard wdleonard@gmail.com" Received: from pmg.Logan.com ([207.170.160.161] verified) by logan.com (CommuniGate Pro SMTP 6.4.0) with ESMTPS id 3619186 for flyrotary@lancaironline.net; Sun, 13 Oct 2024 01:27:20 -0400 Received: from pmg.Logan.com (localhost [127.0.0.1]) by pmg.Logan.com (Proxmox) with ESMTP id A73F71BA0B for ; Sun, 13 Oct 2024 01:27:20 -0400 (EDT) Received-SPF: pass (gmail.com ... _spf.google.com: Sender is authorized to use 'wdleonard@gmail.com' in 'mfrom' identity (mechanism 'include:_netblocks.google.com' matched)) receiver=pmg.Logan.com; identity=mailfrom; envelope-from="wdleonard@gmail.com"; helo=mail-pj1-f42.google.com; client-ip=209.85.216.42 Received: from mail-pj1-f42.google.com (mail-pj1-f42.google.com [209.85.216.42]) by pmg.Logan.com (Proxmox) with ESMTPS for ; Sun, 13 Oct 2024 01:27:20 -0400 (EDT) Received: by mail-pj1-f42.google.com with SMTP id 98e67ed59e1d1-2e2e050b1c3so1854159a91.0 for ; Sat, 12 Oct 2024 22:27:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1728797232; x=1729402032; darn=lancaironline.net; h=to:subject:message-id:date:from:in-reply-to:references:mime-version :from:to:cc:subject:date:message-id:reply-to; bh=14PP8uu2VCh4gfyNF+thh6SQxrlxsvs/2xGKfjxPfek=; b=nqT2X1xLyiPWq6mYw9oKBdtYvi5Ul29DyeHkEDNFIUY0cwTM3ax6b4+d8IxEOoXSI6 CrAg8V1dm3RQ85gJ2arpbnOUAqXZG3TytLq8jvyJ1eIJJGwofCqRHNXSrl3nLlI0QBUO 1jO0xmVjjPuNe1eXp5MHp1b87wBOVpojNjCDIk0RiDs96KwHRVjvSuco4VWAPJ3pH1C7 n7YqCuN0gwN66YTQ6gIVjJ/M7XXEUXE15E8gnCJvJzuvl8YeUM9Q4OSqR349yY8dbyoI G/KSwOUBI13nvXa1S+P4x/Cw5w/MqvqK2SgevxwujhEW5LCxfAKz9glNILEYki4jRBlg a6cA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728797232; x=1729402032; h=to:subject:message-id:date:from:in-reply-to:references:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=14PP8uu2VCh4gfyNF+thh6SQxrlxsvs/2xGKfjxPfek=; b=gTAUOxA6Uge7i97sqJCdoXmEURSUaubyAz63UPaJgccq7XXobnXKSKSeX2o5m9GZYH rVrX7F/ecR+HAMj7l/K22TmzlBuXezYsTVpexlPsJhcuRsdBcISIMqE/NdLhO3seOPIy Xy95Nq6f4r7dTs4TVstnnUQHw26s5LgigcOj8JX6JIEGqm9RkEKbch/UpAhRIKSHsFgM kyY/o1s6dLQvoCP/VS4agrdWf9lFBr3rpNtYX0Io+dGih0NeSaKg4PXHuolI3Y95+oly r4j6/cCLg8Tpx9J83xzILo6GSbbTWW3L5nHvcwTPAuarPloHnl5VNjXLCcOeEME0zRQR 8aKQ== X-Gm-Message-State: AOJu0YzLFhOcw7FDLPE198zTb2t/ztr2yyw0lxKh6g36H7kWuImaeFbj OQr3beilVEsK0p3ySLeeGEt3F+vZY8EBxPDGdFn4UZkeqWw3bH/ObqQchedqOrJgrHRHppqQo6b AT6/QDDtg0jLjJVvju+25tRc/41CeGA== X-Google-Smtp-Source: AGHT+IEyVRJBodlRnFx8ZhR3iNnhHTWfL2C5BRqpLGfA9R7WHO/1V2Oth2WrwNGchbnTPpL4tcBMGrFkMb8FTwJbzJQ= X-Received: by 2002:a17:90b:1947:b0:2e2:af80:8f7a with SMTP id 98e67ed59e1d1-2e2f0d9d901mr10095832a91.20.1728797232496; Sat, 12 Oct 2024 22:27:12 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Sat, 12 Oct 2024 22:27:02 -0700 Message-ID: Subject: Re: [FlyRotary] Re: RV-9A w13B Update To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000ee8972062454f893" X-SPAM-LEVEL: Spam detection results: 0 AWL 1.040 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain DMARC_PASS -0.1 DMARC pass policy FREEMAIL_FROM 0.001 Sender email is commonly abused enduser mail provider HTML_MESSAGE 0.001 HTML included in message RCVD_IN_DNSWL_NONE -0.0001 Sender listed at https://www.dnswl.org/, no trust RCVD_IN_MSPIKE_H3 0.001 Good reputation (+3) RCVD_IN_MSPIKE_WL 0.001 Mailspike good senders SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record T_REMOTE_IMAGE 0.01 Message contains an external image --000000000000ee8972062454f893 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable also, invariably there is oil mist in out air that goes through the cowl and it would probably pretty quickly start getting all over your windscreen and would be continuous PTA to clean it all the time On Sat, Oct 12, 2024, 9:24=E2=80=AFPM Rob McMillan robmcmillanpls@gmail.com= < flyrotary@lancaironline.net> wrote: > Ah! Yeah, my F4U time is pretty limited... (But I am willing to fly one i= n > case anybody is willing to loan me one!). I wasn't thinking of cowl flaps > on top, but louvers that would be pretty much flush... > > It was the windshield slope pressure increase that I wasn't thinking abou= t! > > I really appreciate the great info shared in these emails! > > Thank you! > > Rob > > On Sat, Oct 12, 2024, 5:17=E2=80=AFPM Charlie England ceengland7@gmail.co= m < > flyrotary@lancaironline.net> wrote: > >> If you're talking about putting the exit there, it would have to be near >> the front of the cowl, near the prop. (Been done with a/c engines; see G= arrison >> Melmoth 2 >> ). >> But as you get closer to the windshield, external pressure goes way up, = so >> the air would try to go *down* instead of up. >> >> >> >> Virus-free.www.avast.com >> >> <#m_2314378902410756534_m_1139761703917254549_DAB4FAD8-2DD7-40BB-A1B8-4E= 2AA1F9FDF2> >> >> On Sat, Oct 12, 2024 at 2:38=E2=80=AFPM Rob McMillan robmcmillanpls@gmai= l.com < >> flyrotary@lancaironline.net> wrote: >> >>> Dumb Question here! >>> >>> Why don't we put cooling on the top of the cowl? >>> >>> Seems like the heat would come out better... >>> >>> >>> On Sat, Oct 12, 2024, 11:50=E2=80=AFAM David COOK hoursaway1@comcast.ne= t < >>> flyrotary@lancaironline.net> wrote: >>> >>>> Cowl on for cooling tests. We had good #s with it off then found not >>>> enough airflow with cowl on and had to add some out-venting to the bot= tom >>>> of the cowl with simple SS marine louvers. David >>>> >>>> On 10/11/2024 9:15 PM EDT Doug Lomheim rv9flyer13b@gmail.com < >>>> flyrotary@lancaironline.net> wrote: >>>> >>>> >>>> I now have 4.2 hrs. of ground run time on the 13B I rebuilt in Feb/Mar= , >>>> and will now drop the oil and replace with Mobile One and keep explori= ng >>>> the upper limits of the power band! I got a bit carried away today an= d >>>> pushed it up to 25 inches, and had to go full rich, so will have to tw= eak >>>> the EC2 some more above 16 inches. So far I=E2=80=99m very happy with= the temps >>>> while doing the ground runs, and with OATs from 90-95 degrees, the max >>>> water temp has been 178 degrees, and oil temp only 148. I=E2=80=99ve = been able to >>>> run 30 minutes straight without a cowling, without any temp issues, so= am >>>> wondering if I=E2=80=99m going to be too cool once I start flying it??= :) >>>> >>>> Doug >>>> >>>> [image: IMG_9906.jpg] >>>> >>>> --000000000000ee8972062454f893 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

also, invariably there is oil mist in out air that goes thro= ugh the cowl and it would probably pretty quickly start getting all over yo= ur windscreen and would be continuous PTA to clean it all the time


On Sat= , Oct 12, 2024, 9:24=E2=80=AFPM Rob McMillan robmcmillanpls@gmail.com <flyrotary@lancaironline.net> wrote:
Ah! Yeah, my F4U time is prett= y limited... (But I am willing to fly one in case anybody is willing to loa= n me one!). I wasn't thinking of cowl flaps on top, but louvers that wo= uld be pretty much flush...=C2=A0

It was the windshield slope pressure increase that I wasn't thinkin= g about!

I really apprec= iate the great info shared in these emails!

Thank you!

Rob

On Sat, Oct 12, 2024, 5:17=E2=80=AFPM Charlie England cee= ngland7@gmail.com <flyrotary@lancaironline.net> wrot= e:
If you're talking about putting= the exit there, it would have to be near the front of the cowl, near the p= rop. (Been done with a/c engines; see Ga= rrison Melmoth 2). But as you get closer to the windshield, external pr= essure goes=C2=A0way up, so the air would try to go *down* instead of up.

3D""Virus-free.www.avast.com

On S= at, Oct 12, 2024 at 2:38=E2=80=AFPM Rob McMillan robmcmill= anpls@gmail.com <flyrotary@lancaironline.net> wrote:
Dumb Question here!=C2=A0

Why don't we put cooling on the top of the cowl?

Seems like the heat would come out = better...


On Sat, Oct 12, 2024, 11:50=E2= =80=AFAM David COOK hoursaway1@comcast.net <flyrotary@lancaironline.net> wrote:
=20 =20 =20
Cowl on for cooling= tests. We had good #s with it off then found not enough airflow with cowl = on and had to add some out-venting to the bottom of the cowl with simple SS= marine louvers. David
=20
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On 10/11/2024 9:15 PM EDT Doug Lomheim rv9flye= r13b@gmail.com <flyrotary@lancairon= line.net> wrote:
=20
=C2=A0
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I now have 4.2 hrs. of ground run time = on the 13B I rebuilt in Feb/Mar, and will now drop the oil and replace with= Mobile One=C2=A0and keep exploring the upper limits of the power band!=C2= =A0 I got a bit carried away today and pushed it up to 25 inches, and had t= o go full rich, so will have to tweak the EC2 some more above 16 inches.=C2= =A0 So far I=E2=80=99m very happy with the temps while doing the ground run= s, and with OATs from 90-95 degrees, the max water temp has been 178 degree= s, and oil temp only 148.=C2=A0 I=E2=80=99ve been able to run 30 minutes=C2= =A0straight=C2=A0without a cowling, without any temp issues, so am wonderin= g if I=E2=80=99m going to be too cool once I start=C2=A0flying it?? =C2=A0:= ) =C2=A0
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Doug=C2=A0
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=C2=A0
=20 3D"IMG_9906.jpg"
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