Return-Path: Received: from [65.54.169.147] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3111499 for flyrotary@lancaironline.net; Sun, 21 Mar 2004 12:02:35 -0500 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sun, 21 Mar 2004 09:02:32 -0800 Received: from 67.24.245.147 by bay3-dav117.adinternal.hotmail.com with DAV; Sun, 21 Mar 2004 17:02:32 +0000 X-Originating-IP: [67.24.245.147] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Renesis & RD-1C drive testing Date: Sun, 21 Mar 2004 12:02:30 -0500 MIME-Version: 1.0 X-Mailer: MSN Explorer 7.02.0011.2700 Content-Type: multipart/alternative; boundary="----=_NextPart_001_0006_01C40F3C.62ABB0D0" Message-ID: X-OriginalArrivalTime: 21 Mar 2004 17:02:32.0554 (UTC) FILETIME=[4CF6CCA0:01C40F66] ------=_NextPart_001_0006_01C40F3C.62ABB0D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Greg, Ed Anderson gave you numbers that closely parallel what I have s= een. I tend to cruise at higher altitudes which partly accounts for my s= lightly lower fuel burn. I'm just now starting on my Renesis evaluation. First I wanted to compar= e it to the earlier rotary (89 vintage) so I installed the RD-1C 2.85 : = 1 drive and larger prop (intended for the Renesis). Things are different= enough that it will take at least 20 hours to evaluate. I'll be posting= detailed reports on the website. =20 On the second flight test of this configuration I had planned to do a max= imum performance takeoff to see how it compared. I was fully aware that = the P-factor would be opposite (prop turns right instead of left) but I w= as unprepared for the magnitude of it. With full right rudder the plane = was still veering left. Things happened too quickly for me to be exactly sure of what happened ne= xt but I think when the tail wheel lifted off, the plane turned sharply t= o the left and I was certain that I was going to crash into the fence tha= t borders the runway. No one was more surprised than I when the RV-4 lif= ted off and cleared the fence (barely!). =20 There were lots more interesting differences (most of them good) but it w= ill take several pages and more time than I have right now to explain the= m. =20 My first recommendation when using the -C drive and a big prop is Feed in= power gradually on takeoff until rudder is fully effective. A bit of ri= ght offset in the engine mount might also be in order (mine has none). Tracy ----- Original Message ----- From: Greg Fuess Sent: Sunday, March 21, 2004 1:22 AM To: Rotary motors in aircraft Subject: [FlyRotary] Fuel Consumption Questions Hi Fellow Rotor heads, I am getting very close to starting construction of an RV-7 (much closer than last year when I said this! - should start in 8~10 weeks) and very interested in the potential for the Renesis engine in this application (can't wait for Tracy to get his installed so we can read the performance reports). I do have one question that is difficult for me to get my arms around. What kind of fuel burn are you guys experiencing that are flying your 13Bs? Turbocharged 13Bs? -at various power settings and altitudes? = Is there a data reference site anywhere that could provide this information? Ed Anderson's Rotary Power vs. 2-3-2 Cooling BTU calculation spreadsheet indicated 12.4 to 14.9 gph at 5k to 6k rpm (all for 1,500' alt). This se= ems not to compare well to the lyconosaurus published consumption rates for a 180 hp engine, though I have read elsewhere on the internet that the rota= ry consumption should be similar. Am I misreading or misusing Ed's spreadsheet, or should I get used to the higher consumption rate? Are th= e Lycoming consumption rates bogus? I am something of a lurker here, but as I get closer to the "date", I am getting more and more detail conscientious. Appreciate any and all thoughts. Best Regards, Greg Fuess >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_001_0006_01C40F3C.62ABB0D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Greg, Ed An= derson gave you numbers that closely parallel what I have seen.  I t= end to cruise at higher altitudes which partly accounts for my slightly&n= bsp;lower fuel burn.
 
I'm just now starting o= n my Renesis evaluation.  First I wanted to compare it to the earlie= r rotary (89 vintage) so I installed the RD-1C  2.85 : 1 drive and l= arger prop (intended for the Renesis).  Things are different enough = that it will take at least 20 hours to evaluate.  I'll be posting de= tailed reports on the website. 
 
On the= second flight test of this configuration I had planned to do a maximum p= erformance takeoff to see how it compared.  I was fully aware that t= he P-factor would be opposite (prop turns right instead of left) but I wa= s unprepared for the magnitude of it.  With full right rudder the pl= ane was still veering left.
 
Things happ= ened too quickly for me to be exactly sure of what happened next but I th= ink when the tail wheel lifted off, the plane turned sharply to the left = and I was certain that I was going to crash into the fence that borders t= he runway.  No one was more surprised than I when the RV-4 = ;lifted off and cleared the fence (barely!). 
 
There were lots more interesting differences (most of them g= ood) but it will take several pages and more time than I have right = now to explain them. 
 
My first recomme= ndation when using the -C drive and a big prop is Feed in power gradually= on takeoff until rudder is fully effective.  A bit of right of= fset in the engine mount might also be in order (mine has none).
 
Tracy
 
----- = Original Message -----
From: Greg Fuess
Sent: Sunday, March 21, 2004 1:22 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Fuel Consumption Questions=
 
Hi Fellow Rotor heads,

I am getting very c= lose to starting construction of an RV-7 (much closer
than last year w= hen I said this! - should start in 8~10 weeks) and very
interested in = the potential for the Renesis engine in this application
(can't wait f= or Tracy to get his installed so we can read the performance
reports).=   I do have one question that is difficult for me to get my arms
= around.  What kind of fuel burn are you guys experiencing that are f= lying
your 13Bs?  Turbocharged 13Bs? -at various power settings a= nd altitudes?  Is
there a data reference site anywhere that could= provide this information?

Ed Anderson's Rotary Power vs. 2-3-2 Co= oling BTU calculation spreadsheet
indicated 12.4 to 14.9 gph at 5k to = 6k rpm (all for 1,500' alt).  This seems
not to compare well to t= he lyconosaurus published consumption rates for a
180 hp engine, thoug= h I have read elsewhere on the internet that the rotary
consumption sh= ould be similar.  Am I misreading or misusing Ed's
spreadsheet, o= r should I get used to the higher consumption rate?  Are the
Lyco= ming consumption rates bogus?

I am something of a lurker here, but= as I get closer to the "date", I am
getting more and more detail cons= cientious.  Appreciate any and all
thoughts.

Best Regards,=

Greg Fuess



>>  Homepage:  http://w= ww.flyrotary.com/
>>  Archive:   http://lancairon= line.net/lists/flyrotary/List.html
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