X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) From: "Matt Boiteau mattboiteau@gmail.com" Received: from mail-lj1-f171.google.com ([209.85.208.171] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 1169850 for flyrotary@lancaironline.net; Thu, 28 Jan 2021 21:11:41 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.208.171; envelope-from=mattboiteau@gmail.com Received: by mail-lj1-f171.google.com with SMTP id e18so8757041lja.12 for ; Thu, 28 Jan 2021 18:11:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=502pBqYjzWMcipOxbaA4zDx+ogtEXCcyadaiKGkP4GM=; b=NELml/DgibGQiE9a2Tc0PJT079ru+cVYPZUx3rObn4K/qxfQcyU5GXhmJXm+gTXQD3 EOaIn09FY9+t3WC9T7dUTe4RlMSsr/3drm316fJWb3iZoqb59oqa9GOuYVNad72Ue68m xXroU9GFBXzQlDoHbsLtu5SkYxz7Ll1M1a8mQIeojjakC1vwrPHFStIoaXjPFhd28Q+f so8LzTT4U6nVYpv/pK4UUoGlm7QRpRqVVJGompJ55HuEUD85UFCOYltXmLia1IDpx6Wm YWFU/KLKQrtCZ7jM5DSxRoGTF7bJJHE/xie/LmEAd++fi4AAqut15aS64znjZmuLBMk3 PJkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=502pBqYjzWMcipOxbaA4zDx+ogtEXCcyadaiKGkP4GM=; b=H/g3h7KPz95fTppD3CQOgsn5E0NOWQQqsLWserbiXRJpha2jNZBez5kJn9pIPAEvvF gOJVhK8/qDNThT366oDLPOlObnXFN7+TBfdDfODKeUUmxE118rs6IEalGtT7LwTqnJE8 3D3pa87d8cYhNMG17bsYVjOR8pGZ+Vs8Uxg443uzK3Xdd8g553i/AE7RqOU4+RMDKVFg Uvl+DVi/PQXFdokTc3Tg2nrK4b/ycsS/yaknR0BUsojrHcjyzIfBLZSm8qsfGqfn8mPh z6JyKMiWXkfaPQXNtaREEXsM2LC2Xc2qSWZfKG206Eod276EA98fwUtzw6qmtdHbx29p I2Ag== X-Gm-Message-State: AOAM5326Aqi/3vZ2NeNjmmnskEb5JCnhlVoA5Qi2zemmYtVYIrCIc5km Ft/iOvIGzLJhT1e/9nxGQdR5QS3g5tJU+1VcVvN9GZSymB3eDg== X-Google-Smtp-Source: ABdhPJwrQWdfCCYlezm2jXUiHCcsemN92mgk9RXJ29IxCeASOXL1U42SAJIr6dbBnoqHY7EX1eDNCXZv1Ap9GApkVdc= X-Received: by 2002:a05:651c:550:: with SMTP id q16mr1162076ljp.117.1611886283606; Thu, 28 Jan 2021 18:11:23 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: Date: Thu, 28 Jan 2021 21:11:13 -0500 Message-ID: Subject: Re: [FlyRotary] Re: Ross Farnham - Cooling video To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="0000000000005a4fe805ba0085a7" --0000000000005a4fe805ba0085a7 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable This summer I will design a wireless circuit board that can do 6 temperature probes and 6 pressure ports running off batteries that will send data to cell phone/laptop for capturing. Give us real data to test out different diffuser designs. Charlie, any pictures of your turning vanes? I did a trumpet to wedge diffuser and I don't (only guessing here) think the wedge shapes work as well as they do. Will add some turning vanes to shoot more air into the front of the rads. You are right that I am tail heavy and probably can't do a belly mount :( So the best bet is to get a thicker smaller rad. Le Roux, I have talked with Alex a bunch over exit louvers on the side. We are hoping to tune the exhaust dumping better to help pull air out of the bottom of the cowl. I don't see too many exit louvers though on planes. Any reason for it? Bobby, how did you measure the good airflow? Magnetometers? Won't your ground cooling be harder with a belly mount, the further away from the prop ? Bruce, how far along are you? The tango might be tail heavy like mine, have you done a W&B yet? I am skeptical on P-port =3D 250hp, very skepataple. I = am 10kts slower than a standard lycoming engine in the tango 2, even being p-ported. - Matt Boiteau On Thu, Jan 28, 2021 at 5:13 PM Bruce Cosgrove bcosgrove@mac.com < flyrotary@lancaironline.net> wrote: > Matt > > I have decided to use a belly mount radiator on my tango 2. Have been > dithering around for ages without making a decision - Ross's excellent > articles have convinced me to go with this setup. > I have decided on 20=E2=80=9D x 7=E2=80=9D x either 68 mm 0r 81 mm The = 68 mm (2 3/4=E2=80=9D > will give approximately 385 cubic=E2=80=9D the 81 mm approx 455 cubic = =E2=80=9C which is > around Neil=E2=80=99s recommendation. I have a P Lamar designed radiator= which he > was confident would cool up to 250 hp (two 1/2 =E2=80=9C wide cores addin= g up to > 330 cubic =E2=80=9C so hopefully the thinner 68mm core should be okay giv= en the > lower drag and straight through flow characteristics I am looking at > around 63 =E2=80=9C length for the pod to improve flow characteristics - = All > constructive input welcome I am not sure about the best external shape! > a very rough sketch is attached > > Bruce > > > On 28 January 2021 at 12:07:13, Matt Boiteau mattboiteau@gmail.com ( > flyrotary@lancaironline.net) wrote: > > Ross does the SDS EFI system and did 2 videos on cooling his Subaru > engine. > > https://www.youtube.com/watch?v=3DGGXXEgqhmmc&ab_channel=3Drv6ejguy > > It seems him and Tracy agree that we need a thicker core, then the 1" Pau= l > L kept on suggesting. My coolant rad is almost as wide as the plane with > the 1" truck core. > > I'm definitely not happy with my cooling setup, but needed to get moving > and finish the plane. Can sit around all day talking about it, or start > with something and get better in time. I'm done the flyoff hours in FL an= d > hoping to bring the plane back to Canada in the spring where I can tinker > with it then. 3D draw things out and get suggestions from people then. > > What do you guys think of a belly mount coolant rad? How would we plum th= e > exhaust out of the way? Keep oil coolant in the cowl? Or Below the engine= ? > > > > > > - Matt Boiteau > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --0000000000005a4fe805ba0085a7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
This summer I will design a wireless circuit board that ca= n do 6 temperature probes and 6 pressure ports running off batteries that w= ill send data to cell phone/laptop for capturing. Give us real data to test= out different diffuser designs.=C2=A0
=C2=A0
Charlie, any pictures o= f your turning vanes? I did a trumpet to wedge diffuser=C2=A0and I don'= t (only guessing here) think the wedge shapes work as well as they do. Will= add some turning vanes to shoot more air into the front of the rads. You a= re right that I am tail heavy and probably can't do a belly mount :( So= the best bet is to get a thicker smaller rad.

Le Roux, I have = talked with Alex a bunch over exit louvers on the side. We are hoping to tu= ne the exhaust dumping better to help pull air out of the bottom of the cow= l. I don't see too many exit louvers though on planes. Any reason for i= t?

Bobby, how did you measure the good airflow? Magnetometers? Won&#= 39;t your ground cooling be harder with a belly mount, the further away fro= m the prop ?

Bruce, how far along are you? The tango might be tail h= eavy like mine, have you done a W&B yet? I am skeptical=C2=A0on=C2=A0P-= port =3D 250hp, very skepataple. I am 10kts slower than a standard lycoming= engine in the tango 2, even being p-ported.
=C2=A0
- Matt Boiteau


On Thu, Jan 28, 2021 at 5:13 PM Bruce Cosgrov= e bcosgrove@mac.com <flyrotary@lancaironline.net> wr= ote:
Matt

I have decided to use a belly mount radiator on my tango 2.=C2=A0 Have bee= n dithering around for ages without making a decision - Ross's excellen= t articles have convinced me to go with this setup. =C2=A0
I have decided on 20=E2=80= =9D x 7=E2=80=9D x either 68 mm 0r 81 mm =C2=A0 The 68 mm (2 3/4=E2=80=9D w= ill give approximately 385 cubic=E2=80=9D =C2=A0the 81 mm approx 455 cubic = =E2=80=9C which is around Neil=E2=80=99s recommendation.=C2=A0 I have a P L= amar designed radiator which he was confident would cool up to 250 hp (two = 1/2 =E2=80=9C wide cores adding up to 330 cubic =E2=80=9C so hopefully the = thinner 68mm core should be okay given the lower drag and straight through = flow characteristics =C2=A0 I am looking at around 63 =E2=80=9C length for = the pod to improve flow characteristics - All constructive input welcome = =C2=A0 I am not sure about the best external shape! =C2=A0a very rough sket= ch is attached

Bruc= e


On 28 January 2021 at 12:07:13, Matt Boitea= u mattboiteau@gm= ail.com (flyrotary@lancaironline.net) wrote:

Ross does the SDS EFI system and = did 2 videos on cooling his=C2=A0Subaru engine.

https://www.youtube.com/watch?v=3DGGXXEgqhmmc&ab_channel=3Drv6e= jguy

It seems him and Tracy agree that we need a thicker co= re, then the 1" Paul L kept on suggesting. My coolant rad is almost as= wide as the plane with the 1" truck core.=C2=A0=C2=A0

I'm = definitely=C2=A0not happy with my cooling setup, but needed to get moving a= nd finish the plane. Can sit around all day talking about it, or start with= something and get better in time. I'm done the flyoff=C2=A0hours in FL= and hoping to bring the plane back to Canada in the spring where I can tin= ker with it then. 3D draw things out and get suggestions from people then.<= br>
What do you guys think of a belly mount coolant rad? How would we=C2= =A0plum the exhaust out of the way? Keep oil coolant in the cowl? Or Below = the engine?





- Matt Boiteau
--
Homepage:=C2=A0 http://www.flyrotary.com/
Archive and UnSub:=C2=A0 =C2=A0http://mail= .lancaironline.net:81/lists/flyrotary/List.html
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