X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Received: from py-out-1112.google.com ([64.233.166.180] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 2048628 for flyrotary@lancaironline.net; Wed, 16 May 2007 20:42:02 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.233.166.180; envelope-from=wdleonard@gmail.com Received: by py-out-1112.google.com with SMTP id a29so658300pyi for ; Wed, 16 May 2007 17:41:26 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=qeDVXUrzbEA9kNENH2MFzSY2lYIbkGRMMhe4JobxR5LwuABYn8XYJ3jubrgodPXnx5TIXqm54MPGL2+Yc8J0Tego6tqh9wuM5zkIAWGz79/i1nYt/bA6/TQ/VUyWDXHOx44TeJa5MXDoaUPtoB02NnUHWC7/RddPOhUH572eQrQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=ty2qwqUZY0lKsP/P4D03vzXDi7DTJ5jgwQAIWPFo3PbyJRE9C3JKaG1UmATe6DC682+qBZjbDIzoCmSgCavnHv8f/wNvvt4gVs6QeYtQRrvJ5DBEwns3KKpXXG+eW4ChV2pZR2jBUiR2Hxc2xOAdtYoCrF25hKBlqI22ucOqabY= Received: by 10.114.79.1 with SMTP id c1mr2608962wab.1179362486260; Wed, 16 May 2007 17:41:26 -0700 (PDT) Received: by 10.114.79.14 with HTTP; Wed, 16 May 2007 17:41:26 -0700 (PDT) Message-ID: <1c23473f0705161741t44af2d1fk8933ed40fb5d3ed2@mail.gmail.com> Date: Wed, 16 May 2007 17:41:26 -0700 From: "David Leonard" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Velocity 20B In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_32272_29741481.1179362486188" References: ------=_Part_32272_29741481.1179362486188 Content-Type: text/plain; charset=WINDOWS-1252; format=flowed Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Al, Congrats on getting back in the air!!! When do I get a ride? :-) Funny you should mention about getting leaner at higher MAPS, as I had the same problem after sending my unit in for an upgrade. I was able to mostly compensate using mode 1 and injector offset programming, but at boost the mixture continued to drop off the bottom of the scale (obviously limiting boost). I was about to install larger secondary injectors to make up for the issue... I have an older EC2 and the issued did not exist before an upgrade I received in Sept 05. I never tried controller B... Will do that when I get back in the air. My painter is still having ex-spouse issues and is making no progress on th= e paint job. It is forcing me back into my older hobbies that I have been neglecting like biking, surfing, and drinking (ok, I never really gave that one up). That is great performance with the new prop... are you ready to share a Hangar at Fallbrook yet? --=20 David Leonard Turbo Rotary RV-6 N4VY N4VY.RotaryRoster.net www.RotaryRoster.net On 5/16/07, Al Gietzen wrote: > > I was back in the air over the weekend with newly filtered EC2 board, an= d > a reduced pitch Catto prop. > > > > All the settings in the EC2 that I can display are now remaining as they > were set. That's a good thing, but there is still something wrong in > controller A. The mixture gets leaner as I climb, and the only thing we = can > figure out is something with the induction air temp sensor. Mine origina= lly > came with the 10K thermistor sensor, and Tracy thinks the newer version o= f > the box I got last year may be looking for 3K thermistor. I wasn't aware= of > the change, so maybe that's it =96 haven't figured that out yet. > > > > Controller B works fine. > > > > Lower pitch prop gives me about 400 more engine rpm at static run-up and > climb, 600-700 more at WOT level. The acceleration on take off is very > good =96 from rolling start to about 65-70 kts in 1000-1100 ft, and mains= come > off about 400 - 500 ft later (DA about 2000'). It will climb 1500 fpm as > soon as the gear comes up while burning about 19 gph. > > > > Nice level cruise at 160 ktas and about 10 gph. High speed of 200 ktas at > 19 gph, 2970 rpm on the prop. Very smooth at any speed. Still calibrati= ng > fuel flow so the burn numbers may be a tad off. > > > > Coolant temps are fine for any power =96 stay at about 180-190 climbout, > level cruise drop to 150-160; oil temps get marginally high (220F) in > sustained climb (after rapid climb to pattern altitude) so operational li= mit > is about 500 fpm with 85F OAT, and a bit more works at lower OAT. At crui= se > drops to 180-185. Cooler oil temps in/out and air temps in/out shows that= it > is air flow limited. At some point I will play with the wing root cooler > exit fairing to see if it will enhance flow. > > > > EGTs peak at about 1725F WOT, and run about 1650 cruise power (not leaned= , > maybe close to stochoimetric). > > > > This is all at a total weight of about 2100 lbs. > > > > Al > > > ------=_Part_32272_29741481.1179362486188 Content-Type: text/html; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Al, Congrats on getting back in the air!!!  When do I get a ride?=   :-)
 
Funny you should mention about getting leaner at higher MAPS, as I had= the same problem after sending my unit in for an upgrade.  I was able= to mostly compensate using mode 1 and injector offset programming, but at = boost the mixture continued to drop off the bottom of the scale (obviously = limiting boost).  I was about to install larger secondary injectors to= make up for the issue...  I have an older EC2 and the issued did not = exist before an upgrade I received in Sept 05.  I never tried controll= er B...  Will do that when I get back in the air.
 
My painter is still having ex-spouse issues and is making no progress = on the paint job.  It is forcing me back into my older hobbies that I = have been neglecting like biking, surfing, and drinking (ok, I never really= gave that one up).
 
That is great performance with the new prop...  are you ready to&= nbsp;share a Hangar at Fallbrook yet?

--
David Leonard
<= br>Turbo Rotary RV-6 N4VY
N4VY.= RotaryRoster.net
www.RotaryRoster.net
On 5/16/07, = Al Gietzen <ALVentures@cox.net= > wrote:

I was back in the air over the weekend with newly filtered = EC2 board, and a reduced pitch Catto prop.

 

All the settings in the EC2 that I can display are now rema= ining as they were set.  That's a good thing, but there is still somet= hing wrong in controller A.  The mixture gets leaner as I climb, and t= he only thing we can figure out is something with the induction air temp se= nsor.  Mine originally came with the 10K thermistor sensor, and=20 Tracy thinks the ne= wer version of the box I got last year may be looking for 3K thermistor.&nb= sp; I wasn't aware of the change, so maybe that's it =96 haven't figured th= at out yet.

 

Controller B works fine.

 

Lower pitch prop gives me about 400 more engine rpm at stat= ic run-up and climb, 600-700 more at WOT level.  The acceleration on take off is very good =96 from rolling start to about 6= 5-70 kts in 1000-1100 ft, and mains come off about 400 - 500 ft later (DA a= bout 2000').  It will climb 1500 fpm as soon as the gear comes up whil= e burning about 19 gph.

 

Nice level cruise at 160 ktas= and about 10 gph. High speed of 200 ktas at 19 gph, 2970 rpm on the prop.&= nbsp; Very smooth at any speed.  Still calibrating fuel flow so the bu= rn numbers may be a tad off.

 

Coolant temps are fine for an= y power =96 stay at about 180-190 climbout, level cruise drop to 150-160; o= il temps get marginally high (220F) in sustained climb (after rapid climb t= o pattern altitude) so operational limit is about 500 fpm with 85F OAT, and= a bit more works at lower OAT. At cruise drops to 180-185. Cooler oil= temps in/out and air temps in/out shows that it is air flow limited. At so= me point I will play with the wing root cooler exit fairing to see if it wi= ll enhance flow.

 

EGTs peak at about 1725F WOT,= and run about 1650 cruise power (not leaned, maybe close to stochoimetric)= .

 

This is all at a total weight= of about 2100 lbs.

 

Al

 




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