X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-pv0-f180.google.com ([74.125.83.180] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4225297 for flyrotary@lancaironline.net; Sun, 18 Apr 2010 02:06:12 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.83.180; envelope-from=wdleonard@gmail.com Received: by pvc22 with SMTP id 22so2483307pvc.25 for ; Sat, 17 Apr 2010 23:05:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:received:message-id:subject:from:to:content-type; bh=keHcQRI6GBFyExg4pQ8UsCsb1LuWzYlpc/BMjBUiV/4=; b=Gf8m+xeUjGWYNXrNbeZHylHEL5+deqpT0foBZqGRL3COh5/GqPPdumux7rkM3gvCcM S0yjc2miGXSPEJ3sXL+CKnIkx6/1v0zKqNHp0o923IgY/l2KVM2JGgoFmyUwqcyiMGb8 tWnzJpsM5w6BH2O9VS364u6vkARKOu7pTVaaQ= 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=Fs+liKSr8+4faqu/wF4AJKG8SPObVumIWnmsVjItiH+8PWmXfCpCs9rSVeRpkJlILx pAQ2dRqx/V2ygX1f6f77n7U+5K7797zoMqpcD2X9aR5At63JomrZrYiDlUP9wGDx3VGg NqWUqnHfRMj1go6lncyx0bS+zKyrlYI/UYtuY= MIME-Version: 1.0 Received: by 10.141.36.15 with HTTP; Sat, 17 Apr 2010 23:05:35 -0700 (PDT) In-Reply-To: References: Date: Sat, 17 Apr 2010 23:05:35 -0700 Received: by 10.141.89.14 with SMTP id r14mr3202971rvl.33.1271570735458; Sat, 17 Apr 2010 23:05:35 -0700 (PDT) Message-ID: Subject: Re: [FlyRotary] Re: cooling for ground runs From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=000e0cd13abafe6aa004847ca181 --000e0cd13abafe6aa004847ca181 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Mike, Repeat after me: "I will not rebuild unnecessarily, I will fly instead." "= I will not rebuild unnecessarily, I will fly instead." "I will not rebuild unnecessarily, I will fly instead." "I will not rebuild unnecessarily, I will fly instead." Lets face it. You tinkered with that thing for many years. If you were ever going to get it right you would have done it by now. So quit trying and keep flying. :-) David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Sat, Apr 17, 2010 at 10:51 PM, Mike Wills wrote: > Scott, > > I agree with Dave, that looks great. One picture shows your intake > manifold. Looks like you used a casting for the lower part with a transit= ion > to tubing. Where did you get the casting? Is it a stock Mazda turbo casti= ng > that you cut the top off of? I'd like to do something similar. Not real > happy with my current manifold and would like to rebuild it. > > Mike Wills > > *From:* David Leonard > *Sent:* Saturday, April 17, 2010 9:49 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: cooling for ground runs > > Thanks Scott, > You are right about what I said and I will clarify a little. I say if it > wont cool on the ground, it wont cool in the air because when I first > started flying I had marginal cooling on the ground and marginal cooling = in > the air. At that time I could idle and taxi indefinitely unless the OAT = was > above 85 or so, when my taxi times would be limited to about 30 minutes. > cooling in the air was similarly limited to shallow climbs and less than > full power in all but the coolest of climates. > > However, Chris may be talking about high power ground runs which is a > different story. A full 5 minutes at full power on the ground is sure to > push the limits of most installations, and a temporary spray bar fed from= a > hose is a reasonable thought if you feel the need to do extended ground r= uns > at or near full power. > > BTW Scott, > I just took another look at your website and picture. You sure have done > very nice workmanship. I can't wait to see that thing fly! It is > guaranteed to be one of the fastest RV's around. > > -- > David Leonard > > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net > > On Sat, Apr 17, 2010 at 8:55 PM, wrote: > >> Chris & Terria: >> I had ground running temp issues at lower power. Dave Leonard told me th= at >> it's important to get it to self cool at low to mid power on the ground.= He >> said that reliance on sufficient cooling when you come up to flying spee= d >> most likely won't work if it won't self cool on the ground. I took his >> advise and redesigned my cooling system, which by the way looks a lot li= ke >> yours with major differences being cooler ducting and cooler orientation= . >> He's a link to my page @ EAA326 site: >> http://gallery.eaa326.org/main.php?g2_itemId=3D1727 >> Tracy has commented that I should have reduced the cross section of my o= il >> cooler duct more quickly to force the air to uniformly pass thru the oil >> cooler core. I applied that thinking to my water cooler which I built ne= xt, >> and it worked even better than my cardboard and tape trial duct. >> What is the engine RPM and % load that you start to have cooling problem= s? >> Scott >> >> >> -----Original Message----- >> From: Chris and Terria >> To: Rotary motors in aircraft >> Sent: Sat, Apr 17, 2010 10:02 am >> Subject: [FlyRotary] cooling for ground runs >> >> Gents, >> >> I am doing the higher power ground runs now, and am only able to run for >> about 5 minutes before reaching 195* or so. I=92m looking for ideas on = how to >> extend the time for each ground run. I was thinking of adding a spray b= ar >> like others have discussed. My thought was to drill some holes in some = PVC >> and connect it to the garden hose. Then put it in the intake in front o= f >> the radiator. I would have to run the hose out the front and clamp it d= own >> so it doesn=92t come close to the prop. >> >> I=92m open to all ideas though. >> >> I=92ve attached a picture that shows my radiator and duct work. >> >> Thanks, >> >> Chris >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/Li= st.html >> >> >> > > > > -- --000e0cd13abafe6aa004847ca181 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Mike,
Repeat after me:=A0 "I will not rebuild unnecessarily, I will fly= instead." "I will not rebuild unnecessarily, I will fly instead.= " "I will not rebuild unnecessarily, I will fly instead." &q= uot;I will not rebuild unnecessarily, I will fly instead."
=A0
Lets face it.=A0 You tinkered with that thing for many years.=A0 If yo= u were ever going to get it right you would have done it by now.=A0 So quit= trying and keep flying.=A0 :-)
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

On Sat, Apr 17, 2010 at 10:51 PM, Mike Wills <rv-4mike@cox.net= > wrote:
Scott,
=A0
I agree with Dave, that looks great. One pictur= e shows your intake manifold. Looks like you used a casting for the lower p= art with a transition to tubing. Where did you get the casting? Is it a sto= ck Mazda turbo casting that you cut the top off of?=A0I'd like to do so= mething similar. Not real happy with my current manifold and would like to = rebuild it.
=A0
Mike Wills

Sent: Saturday, April 17, 2010 9:49 PM
To: Rotary motors in aircraft <= /div>
Subject: [FlyRotary] Re: cooling for ground runs

Thanks Scott,
You are right about what I said and I will = clarify a little.=A0 I say if it wont cool on the ground, it wont cool in t= he air because when I first started flying I had marginal cooling on the gr= ound and marginal cooling in the air.=A0 At that time I could idle and taxi= indefinitely unless the OAT was above 85 or so, when my taxi times would b= e limited to about 30 minutes.=A0 cooling in the air was similarly limited = to shallow climbs and less than full power in all but the coolest of climat= es.

However, Chris may be talking about high power ground runs which is a d= ifferent story.=A0 A full 5 minutes at full power on the ground is sure to = push the limits of most installations, and a temporary spray bar fed from a= hose is a reasonable thought if you feel the need to do extended ground ru= ns at or near full power.

BTW Scott,
I just took another look at your website and picture.=A0= You sure have done very nice workmanship.=A0 I can't wait to see that = thing fly!=A0 It is guaranteed to be one of the fastest RV's around.
--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
= http://RotaryRoster.= net

On Sat, Apr 17, 2010 at 8:55 PM, <shipchief@aol= .com> wrote:
Chris & Terria:
I had ground running temp issues at lower power. Dave Leonard told me = that it's important to get it to self cool at low to mid power on the g= round. He said that reliance on sufficient cooling when you come up to flyi= ng=A0speed most likely won't work if it won't self cool on the grou= nd. I took his advise and redesigned my cooling system, which by the way lo= oks a lot like yours with major differences being cooler ducting and cooler= orientation. He's a link to my page @ EAA326 site: http://galle= ry.eaa326.org/main.php?g2_itemId=3D1727
Tracy has commented that I should have reduced the cross section of my oil = cooler duct more quickly to force the air to uniformly pass thru the oil co= oler core. I applied that thinking to my water cooler which I built next, a= nd it worked even better than my cardboard and tape trial duct.
What is the engine RPM and % load that you start to have cooling probl= ems?
Scott


-----Original Message-----
From: Chris and Terria <candtmallory@embarqmail= .com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>=
Sent: Sat, Apr 17, 2010 10:02 am
Subject: [FlyRotary] cooling for ground= runs

Gents,
=A0
I am doing the higher power ground runs now, and a= m only able to run for about 5 minutes before reaching 195* or so.=A0 I=92m= looking for ideas on how to extend the time for each ground run.=A0 I was = thinking of adding a spray bar like others have discussed.=A0 My thought wa= s to drill some holes in some PVC and connect it to the garden hose.=A0 The= n put it in the intake in front of the radiator.=A0 I would have to run the= hose out the front and clamp it down so it doesn=92t come close to the pro= p.
=A0
I=92m open to all ideas though.
=A0
I=92ve attached a picture that shows my radiator a= nd duct work.
=A0
Thanks,
=A0
Chris



=




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