X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-gx0-f176.google.com ([209.85.217.176] verified) by logan.com (CommuniGate Pro SMTP 5.2.13) with ESMTP id 3570639 for flyrotary@lancaironline.net; Sun, 05 Apr 2009 17:07:33 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.217.176; envelope-from=wdleonard@gmail.com Received: by gxk24 with SMTP id 24so5581386gxk.19 for ; Sun, 05 Apr 2009 14:06:57 -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:message-id:subject:from:to:content-type; bh=MZH+145EGOwMumtyHEJa2sWcEBE2mWGu6H4uTMMvtkc=; b=xY6f7bcT/hRY4hZpS7bI/OcAGmgfDPhvEl5OioHqpzyKGg7Da1spHndKVErAwXayHv Vz1uxFO7TvgLAA+MFRPJ2oZBGjn+Aq8nqZGTk9Kr3gc1e4fXCX3FIwY3tQGbxPunC8Sj n6zAk2rb3kE/IJe8O/mKX0y88En3CWZ3T/+lY= 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=Qg9Z5WUlYAz3gCLxLWX0AmCu2+APh1l6oBKrXF3lvRJ6QwoMapOqKWIY954NA/JUUP TDW4bAka1cAvKJ9tUpSVUt2yCx3r+pE0pbprZ9dSL74w2XHcF5Y4UA+kYj9YLco7B6Ax iX5qhqUU//Ibryagqx8sjmq6SgSDXPnS1jipg= MIME-Version: 1.0 Received: by 10.90.120.17 with SMTP id s17mr1497540agc.18.1238965617656; Sun, 05 Apr 2009 14:06:57 -0700 (PDT) In-Reply-To: References: Date: Sun, 5 Apr 2009 14:06:57 -0700 Message-ID: <1c23473f0904051406i55b1738cu39969d8c10decb24@mail.gmail.com> Subject: Re: [FlyRotary] Time to report, 3rd flight! From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=00163628375287846f0466d52936 --00163628375287846f0466d52936 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Excellent report Don! At least the cooling as adequate enough for your 40 hrs. Pretty darn good actually. Though you are right that it is better to have a bigger margin for when it gets warmer. Although I have a pretty big cowl flap, I find that mine has little authority to affect the temperatures. Great Job. -- David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Sun, Apr 5, 2009 at 1:21 PM, Don Wallker wrote: > Test Pilot Tom Porta made his third flight today. He is a high time RV > driver. I'm low time and don't want to be a dummy. Oat 40. max altitude > 8500, field elev 5000 no wind day. > rpm oil temp water temp > Take off. 6000 rpm, , 190-205 182-190 > cruise 6000 200 177 > max throttle 6800 205 183 > MPH at cruise is 163 via GPS. Dynon reading about 12 mph slower. > Sorry, no Egts or rate of climb. I am finding that the Egts are in line > with the 13b and going as high as 1730 during ground testing and not what > was suggested as maxing out at 1550. Glad I Jet Coated with the 2000 degree > stuff. We did get 1675 at 6500 rpm on the 2nd flight. Egt probes in the > exhaust tube, 3 inches from the engine. Tom says it flys like an RV and is > smooth and quiet. When he made a pass, I could only hear the prop until he > passed and then the engine could be heard, but the prop was still most of > it. Hushpower 2. He didn't play with the mixture much. Next time he or I > will add fuel to the mixture to see if the power comes on. > Notes: When switching fuel pumps, #1 switches fine, #2 takes a few seconds > to come on, and drops in pressure, so the engine almost drops out and then > comes back up. And thats with both on for a few seconds. The pumps sound > different too. I put diode on the pumps, but that is not it. I'll be > getting the new ones from Tracy and changing over. And saving 2 pounds! > Pumps on the fire wall, low on the left, shielded, with a blast tube. > The RPM display is dropping out (going to 0) above 6000RPM and coming back > on and off. I used Tracy's fix of a .01uf cap from +12 to ground on the > EM-2 and it's better, but need more. When warm and throttling back, the > engine runs rough and pops a little. More tuning needed, probably mode 2. > As usual, cooling is the main problem. It's OK now, but when things warm it > will be too hot. My configuration is similar to Tracy's RV8 with the 3 > rotor. I have had a slight improvement with the water by narrowing down the > duct at the far end (to force more air through the front) (no manometer > measurements have been taken) and adding smoothing panels where the air > discharges from the radiator. I tried turning it into a James cowl with > outlets on the outside of the cowl, but that made it worse. A lot of time > and trouble. I blocked off the sides of the flywheel so no air would blow > out on the rad or oil cooler, but no difference. My next plan is to open > the bottom of the cowl when the air discharges a little to see if there is a > difference. I notice that what is working for others is cowl flaps, But > there are no pictures. Pictures anyone??!!b I'll also be switching to > Maxdatrixes version of water wetter this week. There are a few other ideas > too, but that will wait until new pumps and this is tried. If the oil > doesn't cool down, I"ll add an additional cooler under the redrive (the > lines run through there now) and build a chin opening near to the prop to > feed it. My existing cooler is a racing one, slightly bigger than the mazda > and rated for 350 psi. > > Don Walker > RV-8 Renesis, EM-2, EC-2, Catto 76/88 1131 LBS CG center of envelope > Intake tuned to 17.5 in but not as smooth as I would like > exhaust at 24 inches all three tubes. > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --00163628375287846f0466d52936 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Excellent report Don!=A0 At least the cooling as adequate enough for y= our 40 hrs.=A0 Pretty darn good actually.=A0 Though you are right that it i= s better to have a bigger margin for when it gets warmer.
=A0
Although I have a pretty big cowl flap, I find that mine has little au= thority to affect the temperatures.
=A0
Great Job.
=A0
--
David Leonard

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


On Sun, Apr 5, 2009 at 1:21 PM, Don Wallker <drwalker@gbis.com> wrote:
Test Pilot Tom Porta made his th= ird flight today. He is a high time RV driver. =A0I'm low time and don&= #39;t want to be a dummy. =A0Oat 40. =A0max altitude 8500, field elev 5000 = no wind day.
=A0 =A0 =A0 =A0 =A0 =A0 =A0rpm =A0 =A0 =A0 =A0 =A0 =A0 =A0 oil temp =A0 =A0= water temp
Take off. =A06000 rpm, , =A0 190-205 =A0 =A0 =A0182-190
c= ruise =A0 =A0 =A0 6000 =A0 =A0 =A0 =A0 =A0 =A0 =A0200 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0177
max throttle 6800 =A0 =A0 =A0 =A0 =A0 =A0205 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0183
MPH at cruise is 163 via GPS. =A0Dynon reading ab= out 12 mph slower.
Sorry, no Egts or rate of climb. =A0I am finding that the Egts are in line = with the 13b and going as high as 1730 during ground testing and not what w= as suggested as maxing out at 1550. =A0Glad I Jet Coated with the 2000 degr= ee stuff. =A0We did get 1675 at 6500 rpm on the 2nd flight. =A0Egt probes i= n the exhaust tube, 3 inches from the engine. Tom says it flys like an RV a= nd is smooth and quiet. =A0When he made a pass, I could only hear the prop = until he passed and then the engine could be heard, but the prop was still = most of it. =A0Hushpower 2. =A0He didn't play with the mixture much. = =A0Next time he or I will add fuel to the mixture to see if the power comes= on.
Notes: =A0When switching fuel pumps, #1 switches fine, #2 takes a few secon= ds to come on, and drops in pressure, so the engine almost drops out and th= en comes back up. =A0And thats with both on for a few seconds. =A0The pumps= sound different too. I put diode on the pumps, but that is not it. =A0I= 9;ll be getting the new ones from Tracy and changing over. =A0And saving 2 = pounds! =A0Pumps on the fire wall, low on the =A0left, shielded, with a bla= st tube.
The RPM display is dropping out (going to 0) above 6000RPM and coming back = on and off. =A0I used Tracy's fix of a .01uf cap from +12 to ground on = the EM-2 and it's better, but need more. When warm and throttling back,= the engine runs rough and pops a little. =A0More tuning needed, probably m= ode 2. As usual, cooling is the main problem. =A0It's OK now, but when = things warm it will be too hot. =A0My configuration is similar to Tracy'= ;s RV8 with the 3 rotor. =A0I have had a slight improvement with the water = by narrowing down the duct at the far end (to force more air through the fr= ont) (no manometer measurements have been taken) and adding smoothing panel= s where the air discharges from the radiator. =A0I tried turning it into a = James cowl with outlets on the outside of the cowl, but that made it worse.= =A0A lot of time and trouble. =A0I blocked off the sides of the flywheel s= o no air would blow out on the rad or oil cooler, but no difference. =A0My = next plan is to open the bottom of the cowl when the air discharges a littl= e to see if there is a difference. =A0I notice that what is working for oth= ers is cowl flaps, But there are no pictures. =A0Pictures anyone??!!b =A0I&= #39;ll also be switching to Maxdatrixes version of water wetter this week. = =A0There are a few other ideas too, but that will wait until new pumps and = this is tried. =A0If the oil doesn't cool down, I"ll add an additi= onal cooler under the redrive (the lines run through there now) and build a= chin opening =A0near to the prop to feed it. =A0My existing cooler is a ra= cing one, slightly bigger than the mazda and rated for 350 psi.

Don Walker
RV-8 Renesis, EM-2, EC-2, Catto 76/88 =A01131 LBS =A0CG c= enter of envelope
Intake tuned to 17.5 in but not as smooth as I would l= ike
exhaust at 24 inches all three tubes.
--
Homepage: =A0http:/= /www.flyrotary.com/
Archive and UnSub: =A0 http://mail= .lancaironline.net:81/lists/flyrotary/List.html



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