X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-fx0-f52.google.com ([209.85.161.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTPS id 5084288 for flyrotary@lancaironline.net; Sat, 06 Aug 2011 23:07:15 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.52; envelope-from=samuel.treffinger@gmail.com Received: by fxd18 with SMTP id 18so843964fxd.25 for ; Sat, 06 Aug 2011 20:06:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=RR4uTq0foWtINiW4dwB/p0gXg33IqaA1G2CCiHO8sIk=; b=dfFKEXrTYR1C+ecgkDZrVsJr2YgErMTQ0AH8Ol14+oCasTiti50QuNY+lds8Lw5vQx D5ZJglQL/k1SB3TnejLEIYyJLrCDl77y7SxP6fGodZdD663Prjv1wIbxn1ba/770k22H 3RacathurcQ/4F5POohSk3/w59nw/PsMpq+jU= MIME-Version: 1.0 Received: by 10.223.86.76 with SMTP id r12mr5381171fal.80.1312686397096; Sat, 06 Aug 2011 20:06:37 -0700 (PDT) Received: by 10.223.107.141 with HTTP; Sat, 6 Aug 2011 20:06:37 -0700 (PDT) In-Reply-To: References: Date: Sat, 6 Aug 2011 22:06:37 -0500 Message-ID: Subject: Re: [FlyRotary] Re: Fuel Burn From: Samuel Treffinger To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=20cf3054a4f766835d04a9e19ede --20cf3054a4f766835d04a9e19ede Content-Type: text/plain; charset=ISO-8859-1 Thank you very much for the information. I appreciate it much. Samuel On Sat, Aug 6, 2011 at 5:29 PM, Dennis Havarlah wrote: > ** > Samual, > 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. > > 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. > 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 ----- > *From:* Samuel Treffinger > *To:* Rotary motors in aircraft > *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?? > thanks, > Sam > > --20cf3054a4f766835d04a9e19ede Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Thank you very much for the information. I appreciate it much.

Samuel

On Sat, Aug 6, 2011 at 5:29= PM, Dennis Havarlah <clouduster@austin.rr.com> wrote:
Samual,
I finally had the oportunity to record= some data=20 for you to consider.
=A0
I flew from Austin to Houston and then= on to=20 Beaumont Texas before returning to Austin the same day.=A0
=A0
Aircraft:=A0 RV-7A with Renesis 4 port= and Sam=20 James Rotary cowl.=A0 Prop - 78X88 Catto 2 blade composite, Tracy's EC-= 2,=20 EM-2 and RWS=A0 2.85:1 redrive.=A0 Intake is my design.=A0 Exhaust uses=20 the stock Renesis manifold (exhaust is directed toward the front of the=20 aircraft), a swirl tube that=A0redirects the exhaust from the front to the= =20 rear and a HushPower Resonator that has lost its guts after about 225=20 hrs.=A0 My exhaust system is all inside the cowl.=A0 Very quiet=20 exhaust!
=A0
Morning flight from Austin to=20 Houston.
Aircraft take-off weight was approx. 1= 800#. Two=20 guys, full fuel and 50 # baggage.
First Leg in the morning - Cruse @ 750= 0"=A0 OAT=20 74 deg. F=A0; 5650 rpm,=A0 MP - 20.5 in hg, 8.0 gph regular auto fuel with= =20 10 % ethanol ( Shell=A0) : =A0Airspeed indicated 122 kts , EM-2 showed=20 163 mph,=A0 Calculated TAS was 165.6= =20 mph.=A0
My oil temp was 173=A0deg F and water = was 190=20 deg F.=A0 My EGT was 1630=A0deg F.=A0 My EGT probes are located on the=20 stock Renesis exhaust manifold about 3/4 inch outboard of the manifold to e= ngine=20 flange.=A0 This close location produces higher EGT readings.
=A0
The second leg was short from Houston = to Beaumont=20 so no data was taken.
=A0
Return to Austin=A0(Cedar Park) was= =A0at 5=20 PM and=A0the OAT was 103 deg F.=A0at Beaumont!
Aircraft weight was about 1700 #.
At liftoff=A0I recorded engine RPM of = 5880 rpm=20 and 13.6 to 13.8 gph fuel flow.
During climb I reduced power to 24.5 i= n-hg and=20 climbed at 800 to 1100 ft/min.
I recorded the EGT as 1750=A0deg 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=A0deg=20 F and=A0 water was 208=A0deg F.
=A0
Cruse Data at 8500'=A0; OAT 72 = 'deg=20 F.
Engine RPM - 5650.=A0; Mp - 19.2 "= ; HG.; EGT -=20 1650 F;=A0=A08.0 gph ; Indicated air speed 119 kts
EM-2 showed 164 TAS.
oil temp - 192 deg F. water temp 175= =20 deg=A0F.
=A0
I leaned the engine to 7.5 gph for a f= ew minutes=20 toward the end of the flight and got 159 TAS, 5520 rpm 170 deg F water and = 189=20 deg=A0F oil.=A0 I plan to experiment with much leaner operation in the=20 future.
=A0
Dennis Haverlah
----- Original Message -----
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

--20cf3054a4f766835d04a9e19ede--