X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTP id 5723486 for flyrotary@lancaironline.net; Wed, 22 Aug 2012 08:51:35 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=2.0 cv=Dp/UCRD+ c=1 sm=0 a=g3L/TDsr+eNLfIieSKfGkw==:17 a=AHkS0RJitIMA:10 a=pavx0Go1UGgA:10 a=05ChyHeVI94A:10 a=ot0gUG65oqYA:10 a=ayC55rCoAAAA:8 a=oCcaPWc0AAAA:8 a=bkCLu30TsUJPkqi5oN4A:9 a=pILNOxqGKmIA:10 a=HHGDD-5mAAAA:8 a=Ia-xEzejAAAA:8 a=1IlZJK9HAAAA:8 a=VkjSkdEz3C9VsrxQPoIA:9 a=_W_S_7VecoQA:10 a=i1zE5R4R5dEA:10 a=EzXvWhQp4_cA:10 a=Z1BvOZmT1TIA:10 a=g3L/TDsr+eNLfIieSKfGkw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.170.10 Received: from [174.110.170.10] ([174.110.170.10:59934] helo=EdPC) by cdptpa-oedge02.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id A4/FF-13948-4B5D4305; Wed, 22 Aug 2012 12:51:01 +0000 Message-ID: From: "Ed Anderson" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: Prop revs Date: Wed, 22 Aug 2012 08:51:01 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0051_01CD8043.41A97080" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 This is a multi-part message in MIME format. ------=_NextPart_000_0051_01CD8043.41A97080 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Steve, if you give me the fuel flow you are seeing at 6300 rpm and = manifold pressure, I can give you a pretty good estimate from my = spreadsheet of what power you are producing. Also should you happen to = have the Air/Fuel ratio that would be a plus but not essential. Ed From: Stephen Izett=20 Sent: Tuesday, August 21, 2012 7:23 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Prop revs Thanks Ed=20 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 On 21/08/2012, at 11:40 PM, Ed Anderson wrote: Steve, 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. The fastest I've ever had the Rv-6A was 200 mph TAS burning round = 13.25-14.5 GPH. 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 Ed From: Stephen Izett=20 Sent: Tuesday, August 21, 2012 10:31 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Prop revs Ed=20 Out of interest, what do you think you are getting in HP from your 13B = and 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 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 So depending on your prop, it looks like you are doing great for = static rpm. Ed From: Neil Unger=20 Sent: Monday, August 20, 2012 9:48 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Prop revs 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 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 No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2197 / Virus Database: 2437/5217 - Release Date: = 08/22/12 ------=_NextPart_000_0051_01CD8043.41A97080 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Steve, if you give me the fuel flow you are = seeing at 6300=20 rpm and manifold pressure, I can give you a pretty good estimate from my = spreadsheet of what power you are producing.  Also should you = happen to=20 have the Air/Fuel ratio that would be a plus but not = essential.
 
Ed

Sent: Tuesday, August 21, 2012 7:23 PM
Subject: [FlyRotary] Re: Prop revs

Thanks Ed=20
I've wondered what my Renesis 4 port with a good intake manifold = and in=20 flight adjustable prop will produce.
So on a cold day she will hopefully still breath to 7250RPM and = maybe=20 approach 200HP?

Cheers

Steve Izett


On 21/08/2012, at 11:40 PM, Ed Anderson wrote:
Steve,
 
On a cold morning when I can see 19-20 gph on = take off=20 at 6200 rpm, I calculate based on fuel burn rate and an air/fuel ratio = of=20 12.65:1 that I am probably producing around 180-185 HP.  On hot = days=20 based on fuel burn of 16.5-17.0 GPH, I calculate around 165-170=20 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

From: Stephen Izett
Sent: Tuesday, August 21, 2012 10:31 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: Prop revs

Ed=20

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

Steve Izett



On 21/08/2012, at 9:15 PM, Ed Anderson wrote:
I would say you have  winner.  = Does of=20 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=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=20 for 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:=20 08/20/12


No virus found in this=20 message.
Checked by AVG - www.avg.com
Version: 2012.0.2197 / = Virus=20 Database: 2437/5217 - Release Date: 08/22/12

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