X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.125] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTP id 5084146 for flyrotary@lancaironline.net; Sat, 06 Aug 2011 18:30:19 -0400 Received-SPF: pass receiver=logan.com; client-ip=71.74.56.125; envelope-from=clouduster@austin.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=YhhhcVvq/Bf3xBNEvzTEV9JHGW2mXul7kEbaqsyQnMQ= c=1 sm=0 a=e9Fp7UO/B8F9COq9AYcbcw==:17 a=N77lTBUgqf3M9RZlgdwA:9 a=ix1gN49c4EJN1I2gjdMA:7 a=wPNLvfGTeEIA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=P2AA1md54VlzFiAnCVcA:9 a=PeeBNe2E9Iy7B8A3Aw0A:7 a=MSl-tDqOz04A:10 a=EzXvWhQp4_cA:10 a=e9Fp7UO/B8F9COq9AYcbcw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 66.68.41.170 Received: from [66.68.41.170] ([66.68.41.170:53437] helo=DWHPC) by hrndva-oedge02.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 2D/F2-19724-750CD3E4; Sat, 06 Aug 2011 22:29:43 +0000 Message-ID: <6AAFF325E617487D8A9F41DB85D29D0F@DWHPC> From: "Dennis Havarlah" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Fuel Burn Date: Sat, 6 Aug 2011 17:29:40 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0359_01CC545E.6C66D7C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_0359_01CC545E.6C66D7C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Samual,=20 I finally had the oportunity to record some data for you to consider. I flew from Austin to Houston and then on to Beaumont Texas before = returning to Austin the same day. =20 Aircraft: RV-7A with Renesis 4 port and Sam James Rotary cowl. Prop - = 78X88 Catto 2 blade composite, Tracy's EC-2, EM-2 and RWS 2.85:1 = redrive. Intake is my design. Exhaust uses the stock Renesis manifold = (exhaust is directed toward the front of the aircraft), a swirl tube = that redirects the exhaust from the front to the rear and a HushPower = Resonator that has lost its guts after about 225 hrs. My exhaust system = is all inside the cowl. Very quiet exhaust! Morning flight from Austin to Houston. Aircraft take-off weight was approx. 1800#. Two guys, full fuel and 50 # = baggage. First Leg in the morning - Cruse @ 7500" OAT 74 deg. F ; 5650 rpm, MP = - 20.5 in hg, 8.0 gph regular auto fuel with 10 % ethanol ( Shell ) : = Airspeed indicated 122 kts , EM-2 showed 163 mph, Calculated TAS was = 165.6 mph. =20 My oil temp was 173 deg F and water was 190 deg F. My EGT was 1630 deg = F. My EGT probes are located on the stock Renesis exhaust manifold = about 3/4 inch outboard of the manifold to engine flange. This close = location produces higher EGT readings. The second leg was short from Houston to Beaumont so no data was taken. Return to Austin (Cedar Park) was at 5 PM and the OAT was 103 deg F. at = Beaumont! Aircraft weight was about 1700 #. At liftoff I recorded engine RPM of 5880 rpm and 13.6 to 13.8 gph fuel = flow. During climb I reduced power to 24.5 in-hg and climbed at 800 to 1100 = ft/min. I recorded the EGT as 1750 deg F but don't know if this was at full = throttle or 24.5 in-hg. During climb to 8500' maximum oil was 216 deg F and water was 208 deg = F. Cruse Data at 8500' ; OAT 72 'deg F. Engine RPM - 5650. ; Mp - 19.2 " HG.; EGT - 1650 F; 8.0 gph ; Indicated = air speed 119 kts EM-2 showed 164 TAS. oil temp - 192 deg F. water temp 175 deg F. I leaned the engine to 7.5 gph for a few minutes toward the end of the = flight and got 159 TAS, 5520 rpm 170 deg F water and 189 deg F oil. I = plan to experiment with much leaner operation in the future. Dennis Haverlah ----- Original Message -----=20 From: Samuel Treffinger=20 To: Rotary motors in aircraft=20 Sent: Thursday, July 28, 2011 3:40 PM Subject: [FlyRotary] Fuel Burn Hey, What kind of fuel burn are you guys getting at say 60% power and = 75% power??=20 thanks, Sam ------=_NextPart_000_0359_01CC545E.6C66D7C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Samual,
I finally had the oportunity to record = some data=20 for you to consider.
 
I flew from Austin to Houston and then = on to=20 Beaumont Texas before returning to Austin the same day.  =
 
Aircraft:  RV-7A with Renesis 4 = port and Sam=20 James Rotary cowl.  Prop - 78X88 Catto 2 blade composite, Tracy's = EC-2,=20 EM-2 and RWS  2.85:1 redrive.  Intake is my design.  = Exhaust uses=20 the stock Renesis manifold (exhaust is directed toward the front of the=20 aircraft), a swirl tube that redirects the exhaust from the front = to the=20 rear and a HushPower Resonator that has lost its guts after about 225 = hrs.  My exhaust system is all inside the cowl.  Very = quiet=20 exhaust!
 
Morning flight from Austin to=20 Houston.
Aircraft take-off weight was approx. = 1800#. Two=20 guys, full fuel and 50 # baggage.
First Leg in the morning - Cruse @ = 7500"  OAT=20 74 deg. F ; 5650 rpm,  MP - 20.5 in hg, 8.0 gph regular auto = fuel with=20 10 % ethanol ( Shell ) :  Airspeed indicated 122 kts , EM-2 = showed=20 163 mph,  Calculated TAS was = 165.6=20 mph. 
My oil temp was 173 deg F and = water was 190=20 deg F.  My EGT was 1630 deg F.  My EGT probes are located = on the=20 stock Renesis exhaust manifold about 3/4 inch outboard of the manifold = to engine=20 flange.  This close location produces higher EGT = readings.
 
The second leg was short from Houston = to Beaumont=20 so no data was taken.
 
Return to Austin (Cedar Park) = was at 5=20 PM and the OAT was 103 deg F. at Beaumont!
Aircraft weight was about 1700 = #.
At liftoff I recorded engine RPM = of 5880 rpm=20 and 13.6 to 13.8 gph fuel flow.
During climb I reduced power to 24.5 = in-hg and=20 climbed at 800 to 1100 ft/min.
I recorded the EGT as 1750 deg F = but don't=20 know if this was at full throttle or 24.5 in-hg.
During climb to 8500' maximum oil was = 216 deg=20 F and  water was 208 deg F.
 
Cruse Data at 8500' ; OAT 72 = 'deg=20 F.
Engine RPM - 5650. ; Mp - 19.2 " = HG.; EGT -=20 1650 F;  8.0 gph ; Indicated air speed 119 kts
EM-2 showed 164 TAS.
oil temp - 192 deg F. water temp 175=20 deg F.
 
I leaned the engine to 7.5 gph for a = few minutes=20 toward the end of the flight and got 159 TAS, 5520 rpm 170 deg F water = and 189=20 deg F oil.  I plan to experiment with much leaner operation in = the=20 future.
 
Dennis Haverlah
----- Original Message -----
From:=20 Samuel Treffinger =
Sent: Thursday, July 28, 2011 = 3:40=20 PM
Subject: [FlyRotary] Fuel = Burn

Hey, What kind of fuel burn are you guys getting at say = 60%=20 power and 75% power??=20
thanks,
Sam
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