X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=aM2ykv1m c=1 sm=1 tr=0 a=Y40JpD914ZZ0NpR41OqDPQ==:117 a=PztgWqEE0rdI0kH/4zgfhA==:17 a=x7bEGLp0ZPQA:10 a=sJHPcXbPt0QA:10 a=KeKAF7QvOSUA:10 a=Ia-xEzejAAAA:8 a=QhLrsF9qAAAA:8 a=eRLigfuSAAAA:8 a=pNMrJF9FR7QZHNC1wAEA:9 a=y7Z8wj_PDS3221mF:21 a=8lmmvfuMCnCCuyC-:21 a=QEXdDO2ut3YA:10 a=1rn6k7xgAAAA:20 a=lHGgX1g1d4LRYhPH4UsA:9 a=J8NisMbKT2B79wrf:21 a=CV9WjMXsWoe2KglI:21 a=HdFFo8_KCK0V80L4:21 a=_W_S_7VecoQA:10 a=Urk15JJjZg1Xo0ryW_k8:22 a=i4tH8neNAzHi3qRh_LgF:22 a=BfhXYjFvZD4iae-mNffo:22 From: "steve Izett" Received: from mail-pf0-f175.google.com ([209.85.192.175] verified) by logan.com (CommuniGate Pro SMTP 6.2c3) with ESMTPS id 10034309 for flyrotary@lancaironline.net; Tue, 22 Aug 2017 01:41:32 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.192.175; envelope-from=steveize@gmail.com Received: by mail-pf0-f175.google.com with SMTP id w127so12070655pfd.2 for ; Mon, 21 Aug 2017 22:41:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:mime-version:subject:date:references:to:in-reply-to:message-id; bh=O23Qb8/T7rBB5bHNzTejPQeT3SRHooK64gG3tJrJUac=; b=jveYYZJx3qXWC19sf7tYKxPYJ4jRMbCsyKdOycFQtrO6nHGQbJx1B0A+5gEvApDrn+ 3uQg0FKS1LeGB1kmtUcICIgagWfFdlf9+thwJgnOOKQnKHx/T9djfgKXJJXVKuMYYomi jiQZFz2atIwpnfrHmQVvzc/dHjXmEHCY3L7uYzC/U3iBGvVakxnDNZzp5uqbebJdINQS gbmlbZM4BhRHZKnc6a1WR4iXqkTuiL8jX7/6ica7BHwam69S99KmMTia3b9p9pj+Txrk +VQgm0X8PZWdHdOt/DIKE5dzBxMnHxJkiny5xZQs9PcUuLQBFEfdI676Vl5YBmFUNJx5 mQ2g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:mime-version:subject:date:references:to :in-reply-to:message-id; bh=O23Qb8/T7rBB5bHNzTejPQeT3SRHooK64gG3tJrJUac=; b=EE8+GVir8w+I9tjapIQq3ss59deWglCJFQR8Yjk8LUkGGNzBD3fqBj0xBHw+D3/OxK VHWIxYMXFkbrZhWeDWl+RiMRVWGrvnZtNbhqBANaYTDdFbXe3nNpppWKLq4eKkWSaAa7 YJGbKxHVUpVt4pUb3aQvfgojGs6A+JeuK8PCSXfVucb5wsb96ERdZodA58wCLKsQ2B/2 xNWHUul6/IEE5F30U+hBlZkBl4/GXLSUDUTMjcDFxDAN5EN9WHM63iTP6ZFgv0PuTspK c/nB3U2YXjvz5Ev3sNPp91SkX35w0YgoOw/pYLvmJUEs2qbbvXbaJUc+xd8WNEJjk/4Q sj2Q== X-Gm-Message-State: AHYfb5iV0gzPqFYDVskFxmzxPqLX3HLHuLBYWl5b8IEmqMhoCn3p1Paq RUGNTfblru0/gtwj6tw= X-Received: by 10.98.40.5 with SMTP id o5mr19738456pfo.203.1503380475890; Mon, 21 Aug 2017 22:41:15 -0700 (PDT) Return-Path: Received: from [10.1.1.22] (220-253-186-202.dyn.iinet.net.au. [220.253.186.202]) by smtp.gmail.com with ESMTPSA id a22sm23300787pfj.94.2017.08.21.22.41.14 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 21 Aug 2017 22:41:15 -0700 (PDT) Content-Type: multipart/alternative; boundary="Apple-Mail=_1664A88D-1907-4FC4-BE2E-85CE4D661132" Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: Re: [FlyRotary] Re: Elec Rad Fans Date: Tue, 22 Aug 2017 13:41:10 +0800 References: To: Rotary motors in aircraft In-Reply-To: Message-Id: X-Mailer: Apple Mail (2.3273) --Apple-Mail=_1664A88D-1907-4FC4-BE2E-85CE4D661132 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Thanks Todd Yep in Perth near Andrew. Do you have photos of your duct work and what made the difference? Steve > On 22 Aug 2017, at 1:10 pm, Todd Bartrim = wrote: >=20 > Long ago I had this same idea. To test it I put a cheap fan (one of = those fans they sell for truckers to put on their dash) behind the right = rad. It wasn't a great install, but it made no measurable difference on = the ground and after a short flight the fan blades had completely broken = off. I'm sure you would see better results with something like this > = http://daviescraig.com.au/product/8-thermatic-fan-12v-0135/8-thermatic-fan= -12v-0135 = > But I'm still not convinced it's worth it. The work that I've done = with improved ducting seems to have made a world of difference and my = temps are staying under control even with extensive ground testing. The = temps get hottest after shutdown which I never experienced before (more = in a separate post). > However I would be curious to know the results of testing with a = proper fan. > You are in Australia, correct? Davies Craig is a company from down = under and I'm using their EWP's in my plane. They seem good to talk to, = so give them a call and tell them what you plan on using it for. >=20 > Todd --- It's a good thing I have no neighbors close enough to see me = or they'd think I went nuts today, taxing circles in my driveway. >=20 > Todd Bartrim >=20 > On Mon, Aug 21, 2017 at 8:08 PM, Andrew Martin = > = wrote: > Steve, I don't think they are really an option, not much heat is = generated at idle/taxi speeds, just weight and drag you don't need. = other aspects will be at play like your exits etc. > There was tufting put inside a Bonanza cowl a few years back which = showed complete reversal of flow through the cowl, explained why it = would cool better on the ground with wind up its ass. prop probably = sucking the air out. > I think this airflow stuff is sometimes dark magic. > Andrew >=20 > Regards >=20 > Andrew Martin >=20 > +61 0427477144 > +61 8 6365 5648 > +61 8 9924 1145 > andrew@martinag.com.au >=20 >=20 >=20 >=20 > On Tue, Aug 22, 2017 at 10:08 AM, steve Izett = > = wrote: > Hi Guys > I seam to remember way back something being said about elect fans on = exchangers in aircraft. > The reason for my question is if your prop doesn=E2=80=99t have very = good blades for pushing air in tight to the spinner would an elec be = helpful for sitting and taxiing? > My concern would be restriction of the incoming air once at speed and = how it would go at high air speeds even with a good diffuser. > Has anyone ever used one? > I tried to emulate tracy=E2=80=99s 20b setup on the Renesis 4port=20 > I=E2=80=99ve got 540CI of Water cooler and 193CI of Oil cooler (out of = RX7 turbo from memory) >=20 > >=20 > Steve Izett >=20 >=20 >=20 --Apple-Mail=_1664A88D-1907-4FC4-BE2E-85CE4D661132 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Thanks Todd
Yep in Perth near = Andrew.
Do you have photos of your duct work and = what made the difference?
Steve
On = 22 Aug 2017, at 1:10 pm, Todd Bartrim <flyrotary@lancaironline.net> wrote:

Long ago I had this same idea. To test it I put a cheap fan = (one of those fans they sell for truckers to put on their dash) behind = the right rad. It wasn't a great install, but it made no measurable = difference on the ground and after a short flight the fan blades had = completely broken off. I'm sure you would see better results with = something like this
 http://daviescraig.com.au/product/8-thermatic-fan-12v-0135/8-th= ermatic-fan-12v-0135
But I'm still not = convinced it's worth it. The work that I've done with improved ducting = seems to have made a world of difference and my temps are staying under = control even with extensive ground testing. The temps get hottest after = shutdown which I never experienced before (more in a separate = post).
  However I would be curious to know = the results of testing with a proper fan.
You are = in Australia, correct? Davies Craig is a company from down under and I'm = using their EWP's in my plane. They seem good to talk to, so give them a = call and tell them what you plan on using it for.
Todd ---  It's a good thing I = have no neighbors close enough to see me or they'd think I went nuts = today, taxing circles in my driveway.

Todd Bartrim

On Mon, Aug 21, 2017 at 8:08 = PM, Andrew Martin <flyrotary@lancaironline.net> wrote:
Steve, I = don't think they are really an option, not much heat is generated at = idle/taxi speeds, just weight and drag you don't need. other aspects = will be at play like your exits etc.
There was = tufting put inside a Bonanza cowl a few years back which showed complete = reversal of flow through the cowl, explained why it would cool better on = the ground with wind up its ass. prop probably sucking the air out.
I think this airflow stuff is sometimes dark magic.
Andrew
Regards

Andrew Martin

+61 0427477144
+61 8 6365 5648
+61 8 9924 1145
andrew@martinag.com.au




On Tue, Aug 22, 2017 at 10:08 = AM, steve Izett <flyrotary@lancaironline.net> wrote:
Hi Guys
I seam = to remember way back something being said about elect fans on exchangers = in aircraft.
The reason for my question is if your = prop doesn=E2=80=99t have very good blades for pushing air in tight to = the spinner would an elec be helpful for sitting and taxiing?
My concern would be restriction of the incoming air once at = speed and how it would go at high air speeds even with a good = diffuser.
Has anyone ever used one?
I tried to emulate tracy=E2=80=99s 20b setup on the Renesis = 4port 
I=E2=80=99ve got 540CI of Water cooler = and 193CI of Oil cooler (out of RX7 turbo from memory)

<GSIIRG5.JPG>= <GSIIRG6.JPG>= <GSIIRG7.JPG>= <GSIIRG8.JPG>=

Steve = Izett




= --Apple-Mail=_1664A88D-1907-4FC4-BE2E-85CE4D661132--