X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nk11p08mm-asmtp008.mac.com ([17.158.58.253] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTP id 5722867 for flyrotary@lancaironline.net; Tue, 21 Aug 2012 19:23:48 -0400 Received-SPF: pass receiver=logan.com; client-ip=17.158.58.253; envelope-from=steveizett@me.com MIME-version: 1.0 Content-type: multipart/alternative; boundary="Boundary_(ID_6fTXBADJ/iQJOhev0Fmv/A)" Received: from [10.1.1.6] (124-148-67-231.dyn.iinet.net.au [124.148.67.231]) by nk11p08mm-asmtp008.mac.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Jan 3 2012)) with ESMTPSA id <0M94001HYOYI6K80@nk11p08mm-asmtp008.mac.com> for flyrotary@lancaironline.net; Tue, 21 Aug 2012 23:23:12 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.7.7855,1.0.260,0.0.0000 definitions=2012-08-21_05:2012-08-21,2012-08-21,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=6.0.2-1203120001 definitions=main-1208210255 From: Stephen Izett Subject: Re: [FlyRotary] Re: Prop revs Date: Wed, 22 Aug 2012 07:23:05 +0800 In-reply-to: To: Rotary motors in aircraft References: Message-id: <4B5CF0AB-7774-4952-B940-C555C6B1EC04@me.com> X-Mailer: Apple Mail (2.1278) --Boundary_(ID_6fTXBADJ/iQJOhev0Fmv/A) Content-type: text/plain; charset=windows-1252 Content-transfer-encoding: quoted-printable Thanks Ed I've wondered what my Renesis 4 port with a good intake manifold and in = flight adjustable prop will produce. So on a cold day she will hopefully still breath to 7250RPM and maybe = approach 200HP? Cheers Steve Izett =20 On 21/08/2012, at 11:40 PM, Ed Anderson wrote: > Steve, > =20 > On a cold morning when I can see 19-20 gph on take off at 6200 rpm, I = calculate based on fuel burn rate and an air/fuel ratio of 12.65:1 that = I am probably producing around 180-185 HP. On hot days based on fuel = burn of 16.5-17.0 GPH, I calculate around 165-170 HP. > =20 > The fastest I've ever had the Rv-6A was 200 mph TAS burning round = 13.25-14.5 GPH. > =20 > But, none of this was done on a dyno - its based on fuel burn and rpm = and we all know a rotary can pass through more fuel than is producing = power. Anyhow, it=92s the best estimate I have.=20 > =20 > Ed >=20 > From: Stephen Izett > Sent: Tuesday, August 21, 2012 10:31 AM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: Prop revs >=20 > Ed >=20 > Out of interest, what do you think you are getting in HP from your 13B = and at what RPM? >=20 > Steve Izett >=20 >=20 >=20 > On 21/08/2012, at 9:15 PM, Ed Anderson wrote: >=20 >> I would say you have winner. Does of course depend on what prop = load you were pulling during static run. >> =20 >> I have a fixed pitch 74x88 and a well-tuned older 13B and the best I = have ever got static - was 6200 rpm on a cold day. Normally, I get = 6000-6100 rpm.=20 >> =20 >> So depending on your prop, it looks like you are doing great for = static rpm. >> =20 >> Ed >>=20 >> From: Neil Unger >> Sent: Monday, August 20, 2012 9:48 PM >> To: Rotary motors in aircraft >> Subject: [FlyRotary] Prop revs >>=20 >> All, >> Looks like I am finally connected after many attempts.. I = have a P ported renesis in a glastar that is ready to fly. Tuning the = motor yesterday to find that I cannot get the motor revs over 6300. I = suspected the prop (prince fixed) is too big, but am assured that that = is normal as a static load. Lonnie suggests that once moving the extra = revs will appear. How do I tune the motor for the top end revs? Any = advice? Neil. >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2012.0.2197 / Virus Database: 2437/5211 - Release Date: = 08/20/12 >>=20 >=20 > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.2197 / Virus Database: 2437/5212 - Release Date: = 08/20/12 >=20 --Boundary_(ID_6fTXBADJ/iQJOhev0Fmv/A) Content-type: text/html; charset=windows-1252 Content-transfer-encoding: quoted-printable
Steve,
 
On a cold morning when I can see 19-20 gph on = take off at=20 6200 rpm, I calculate based on fuel burn rate and an air/fuel ratio of = 12.65:1=20 that I am probably producing around 180-185 HP.  On hot days based = on fuel=20 burn of 16.5-17.0 GPH, I calculate around 165-170 HP.
 
The fastest I've ever had the Rv-6A was 200 = mph TAS=20 burning round 13.25-14.5 GPH.
 
But, none of this was done on a dyno - its = based on fuel=20 burn and rpm and  we all know a rotary can pass through more fuel = than is=20 producing power.  Anyhow, it=92s the best estimate I have. =20
 
Ed

Sent: Tuesday, August 21, 2012 10:31 AM
Subject: [FlyRotary] Re: Prop revs

Ed=20

Out of interest, what do you think you are getting in HP from your = 13B and=20 at what RPM?

Steve Izett



On 21/08/2012, at 9:15 PM, Ed Anderson wrote:

I would say you have  winner.  = Does of course=20 depend on what prop load you were pulling during static run. =
 
I have a fixed pitch 74x88 and a well-tuned = older 13B=20 and the best I have ever got static - was 6200 rpm on a cold = day. =20 Normally, I get 6000-6100 rpm. 
 
So depending on your prop, it looks like you = are doing=20 great for static rpm.
 
Ed

From: Neil Unger
Sent: Monday, August 20, 2012 9:48 PM
Subject: [FlyRotary] Prop revs

All,
       Looks like I am finally = connected=20 after many attempts..  I have a P ported renesis in a glastar = that is=20 ready to fly.  Tuning the motor yesterday to find that I cannot = get the=20 motor revs over 6300.  I suspected the prop (prince fixed) is too = big,=20 but am assured that that is normal as a static load.  Lonnie = suggests=20 that once moving the extra revs will appear.  How do I tune the = motor for=20 the top end revs?  Any advice?  = Neil.

No virus found in this=20 message.
Checked by AVG - www.avg.com
Version: 2012.0.2197 / = Virus=20 Database: 2437/5211 - Release Date:=20 08/20/12


No virus found in this=20 message.
Checked by AVG - www.avg.com
Version: 2012.0.2197 / = Virus=20 Database: 2437/5212 - Release Date: 08/20/12


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