X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.122] verified) by logan.com (CommuniGate Pro SMTP 5.3.8) with ESMTP id 4423164 for flyrotary@lancaironline.net; Sun, 08 Aug 2010 20:09:14 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.122; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=u/U1e8HDqAuZ6D7PZSLtwfgHM/F88aXuWApFbLu6tCA= c=1 sm=0 a=-b3SfnSzLBkA:10 a=Er6hwA6a1l4K/FyzC6NN7w==:17 a=3oc9M9_CAAAA:8 a=7g1VtSJxAAAA:8 a=Ia-xEzejAAAA:8 a=arxwEM4EAAAA:8 a=r1ClD_H3AAAA:8 a=QdXCYpuVAAAA:8 a=VBM29JkfPZkNxTu-hbwA:9 a=MrZA7QPVp2azcjxeNTYA:7 a=z-iUT-y7bWFUEcydwWA4c-cfB4YA:4 a=wPNLvfGTeEIA:10 a=Qa1je4BO31QA:10 a=U8Ie8EnqySEA:10 a=inWmm14olhEaiuP4wUAA:9 a=WZcjt2PfDfGUo-eN_SwA:7 a=fxGMpt5Wyhueehj5VP7OD1rKwa8A:4 a=EzXvWhQp4_cA:10 a=Er6hwA6a1l4K/FyzC6NN7w==:117 X-Cloudmark-Score: 0 X-Originating-IP: 75.181.123.159 Received: from [75.181.123.159] ([75.181.123.159:50460] helo=EdPC) by cdptpa-oedge03.mail.rr.com (envelope-from ) (ecelerity 2.2.2.39 r()) with ESMTP id 87/8E-09824-7074F5C4; Mon, 09 Aug 2010 00:08:39 +0000 Message-ID: From: "Ed Anderson" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Latest engine run Date: Sun, 8 Aug 2010 20:08:23 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0014_01CB3735.74682DD0" 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_0014_01CB3735.74682DD0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sounding good, Brian My spreadsheet indicates that at 5660 rpm with a 12.5:1 Air/Fuel ratio = (rich) with 100% Ve the engine could be producing 161 HP with a fuel = burn of 15.0 gph (did you happen to notice what your fuel flow was?). Your engine would be producing 4940 BTU/min (coolant discharged) and = 2470 BTU/min( oil discharged) of waste heat. Your prop rpm with the = 2.85:1 gear box would have been 1951 RPM. =20 This is all assuming standard sea level conditions 29.92 and 59F = Air/fuel of 12.5:1 and a bfsc of 0.55 - any changes to those variable = will affect the power production calculation. If you can wind the engine to 6800 rpm then with the same (best power) = air/fuel ratio and 100% Ve it should produce 197 HP turning your prop at = 2386 RPM burning approx 18.3 GPH. Ed From: Bktrub@aol.com=20 Sent: Sunday, August 08, 2010 7:28 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Latest engine run A few weeks ago I wrote that I had run up the engine to 4500 RPM, but = that was not WOT. I went up and ran it today,WOT, and got the following = results. Temperature today~ 70 F Humidity- high, maybe 80% RPM 5660 MP- didn't remember to look Prop Catto 74 DIA x 88 pitch Engine 93 13BREW N/A=20 Primary injectors - stock, 28 lb. Secondary injectors stock 40 lb. PRSU RWS 2.85/1 RWS EM2 said it was making 161 hp. at 5660 RPM Tail wheel was tied down, the brakes don't seem to hold at WOT even on = dry cement.=20 My induction system was not hooked up, it was configured as shown in the = photo.=20 I think, based on the above, that I might see 194 HP at 6800 RPM, which = is 2386 RPM at the prop. Anyone who can calculate this more accurately, = or shed more light, please go ahead and 'splain it to me.=20 In any case, I'm pretty sure it will be able to get off the ground.=20 The airworthiness inspection is completed, taxes are paid, and = registration should arrive in the next few days. I'm still working on my = tail wheel endorsement, I should have it by the time my instructor makes = his next car payment, I hope. Also, trying to get some time in some tail = wheel RV's. There are several people who have offered to take me up to = get a feel for how they fly.=20 Steve Beckham and Mark Hatch graciously flew up to give the plane some = scrutiny two weeks ago.=20 So, depending on how the stars line up, This plane might be airborne by = the end of the month.=20 Brian Trubee -------------------------------------------------------------------------= ------- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html Ed Anderson Rv-6A N494BW Rotary Powered http://www.andersonee.com http://www.eicommander.com Http://www.dmack.net/mazda/index.html http://www.flyrotary.com ------=_NextPart_000_0014_01CB3735.74682DD0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Sounding good, Brian
 
My spreadsheet indicates that at 5660 rpm with a = 12.5:1=20 Air/Fuel ratio (rich) with 100% Ve the engine could be producing 161 HP = with a=20 fuel burn of  15.0 gph (did you happen to notice what your fuel = flow=20 was?).
 
Your engine would be producing  4940 BTU/min = (coolant=20 discharged) and 2470 BTU/min( oil discharged) of waste heat.  Your = prop rpm=20 with the 2.85:1 gear box would have been 1951 RPM. 
 
This is all assuming standard sea level conditions = 29.92 and=20 59F Air/fuel of 12.5:1 and a bfsc of 0.55 - any changes to those = variable will=20 affect the power production calculation.
 
If you can wind the engine to 6800 rpm then with the = same=20 (best power) air/fuel ratio and 100% Ve it should produce 197 HP turning = your=20 prop at 2386 RPM burning approx 18.3 GPH.
 
Ed

From: Bktrub@aol.com
Sent: Sunday, August 08, 2010 7:28 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Latest engine run

A few weeks ago I wrote that I had run up the engine to 4500 RPM, = but that=20 was not WOT. I went up and ran it today,WOT, and got the following=20 results.
 
 
Temperature today~ 70 F
Humidity- high, maybe 80%
RPM 5660
MP- didn't remember to look
Prop Catto  74 DIA x 88 pitch
Engine 93 13BREW N/A
Primary injectors - stock, 28 lb.
Secondary injectors  stock 40 lb.
PRSU RWS 2.85/1
RWS EM2 said it was making 161 hp. at 5660 RPM
Tail wheel was tied down, the brakes don't seem to hold at WOT even = on dry=20 cement.
 
My induction system was not hooked up, it was configured as shown = in the=20 photo.
I think, based on the above, that I might see 194 HP at 6800 RPM, = which is=20 2386 RPM at the prop. Anyone who can calculate this more accurately, or = shed=20 more light, please go ahead and 'splain it to me.
In any case, I'm pretty sure it will be able to get off the ground. =
 
The airworthiness inspection is completed, taxes are paid, and = registration=20 should arrive in the next few days. I'm still working on my tail wheel=20 endorsement, I should have it by the time my instructor makes his next = car=20 payment, I hope. Also, trying to get some time in some tail wheel RV's. = There=20 are several people who have offered to take me up to get a feel for how = they=20 fly.
 
Steve Beckham and Mark Hatch graciously flew up to give the plane = some=20 scrutiny two weeks ago.
 
So, depending on how the stars line up, This plane might be = airborne by the=20 end of the month.
 
Brian Trubee

--
Homepage:  http://www.flyrotary.com/
Archive and=20 UnSub:  =20 http://mail.lancaironline.net:81/lists/flyrotary/List.html
Ed Anderson
Rv-6A N494BW Rotary Powered
http://www.andersonee.com
http://www.eicommander.com
Http://www.dmack.net/mazda= /index.html
http://www.flyrotary.com
 
 
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