X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-yw0-f42.google.com ([209.85.213.42] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTPS id 5738484 for flyrotary@lancaironline.net; Fri, 31 Aug 2012 12:52:34 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.213.42; envelope-from=rwstracy@gmail.com Received: by yhoo21 with SMTP id o21so603481yho.1 for ; Fri, 31 Aug 2012 09:51:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:references:from:content-type:x-mailer:in-reply-to :message-id:date:to:content-transfer-encoding:mime-version; bh=csXLKI3JEFqC9vGfoolrJYnKUaV84iY4An1nfyip9OQ=; b=uMUtZjLDS/71pEL8xoqbfz/JGsJfjpfEBvTPginNTc2+ECm5qgALhUqWbzlnVB4qe1 39SNseRCAzEjwVqJ3JW91gR8n4JzmLA2Jh4flAfmziVbZmGBiz4KwqJcz+YoGDi3MR3P /glpLYQA/tHTwBjn/kMfG8nVw1728d3GU0tM2ZiK8Q6CvnC/Zub6KYQrtlQYtdNGrghx 68JI/ubzu8C5g6V/RKjqTsQBnxE9lHY76ZB76SpC9CQSb6uZLyqCJUYFhX2EF02p5eP0 Jy+5kHKI0M89mdhd74Y9Ymaedo+pJ4+gUgRWJRrsy6o9nTkKOH8LdFMVjRdzx/FtCdaf sElw== Received: by 10.236.146.74 with SMTP id q50mr8769594yhj.128.1346431919410; Fri, 31 Aug 2012 09:51:59 -0700 (PDT) Return-Path: Received: from [192.168.1.5] (20.sub-70-193-208.myvzw.com. [70.193.208.20]) by mx.google.com with ESMTPS id a79sm9347465yhk.16.2012.08.31.09.51.55 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 31 Aug 2012 09:51:58 -0700 (PDT) Subject: Re: [FlyRotary] Re: FIRST FLIGHT N655HC References: From: Tracy Content-Type: multipart/alternative; boundary=Apple-Mail-48ED4BBB-2DE9-4564-ACCC-B556CCCB94BD X-Mailer: iPad Mail (9B206) In-Reply-To: Message-Id: <7289B43C-BDCE-4E6C-B057-F401BD3E7909@gmail.com> Date: Fri, 31 Aug 2012 12:51:49 -0400 To: Rotary motors in aircraft Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-48ED4BBB-2DE9-4564-ACCC-B556CCCB94BD Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 It IS good to seal that area behind the spinner but for a different reason. = I was trying to improve cooling one day and sealed around the neck of the d= rive. Cooling got ever so slightly worse but my airspeed at the rpm I was t= esting at go BETTER (by about 2 mph). The reason was that the spinner was p= umping air out of the cowl at the spinner gap (mine was pretty big, about 1/= 2") and creating drag. But since the air was being drawn from behind the ra= d, it improved cooling a little. I was glad to make the trade because a sol= id 2 mph is harder to come by than the little bit of cooling that it gave up= . Tracy Sent from my iPad On Aug 31, 2012, at 12:25 PM, "Bill Bradburry" wr= ote: > I didn=E2=80=99t see any input when I last asked this question, so I will t= ry now that we are again talking about cooling. > =20 > How are you sealing around the PSRU outlet on the cowl? I am talking abou= t the area behind the spinner. This area allows air to enter behind the hea= t exchangers and it seems to me that it would adversely affect cooling. Thi= s area is open on my plane because I haven=E2=80=99t figured out how to seal= it. I am wondering what others have done? > =20 > Bill B > =20 > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Be= half Of Ed Anderson > Sent: Friday, August 31, 2012 11:56 AM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: FIRST FLIGHT N655HC > =20 > Congratulations David, > =20 > I would completely seal any leaks around the sides or anyplace else that c= ould leak between duct inlet and radiator. I read someplace that a 1/2"squa= re hole could cost you 20% of your cooling effectiveness.=20 > =20 > A gent who once sold Subaru engine installations tried just sticking the r= adiator in back of the opening (no ducting) - did not cool. > =20 > Yes, I find that getting the airflow up as soon as safely possible will he= lp a great deal in keeping temps down and bring them back down quickly. My m= agic airspeed after take off is 120 MPH IAS then a 140 IAS for climbout. > =20 > Looking forward to more reports > =20 > Ed > =20 > =20 > =20 > From: Ernest Chrisltey > Sent: Friday, August 31, 2012 11:01 AM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: FIRST FLIGHT N655HC > =20 > Congratulations, David. I hope to be following you soon. >=20 > Are you able to cool on the ground? What did you do to improve the coolin= g between the two flights? >=20 >=20 > On 08/30/2012 10:48 PM, hoursaway1@comcast.net wrote: >> Thanks Mark, it was kind of anti-climatic for the others on the ground be= cause they already saw that last month, but for me seeing the temps coming d= own at about the same stage as Terry saw them still climbing was comforting.= I'm setting up a video camera to record the panel so I can focus on flying= for now until I get more comfortable. We have a 100 mile radius to work wi= th & I asked for & was granted a crew member during the flights that compute= r tuning will be worked on. Tryed to get a stewardess also but FAA said no.= ???? Yes I read Ed's procedure for takeoff & our sys. is very similar s= o will use for next flights. Terry is a member of our EAA Chapter 55 here i= n Mason MI, his dad just flew his 400 th Young Eagle. = ( where is that stewardess with my Margarita )= David. >>=20 >> From: "Mark Steitle" >> To: "Rotary motors in aircraft" >> Sent: Thursday, August 30, 2012 7:44:53 PM >> Subject: [FlyRotary] Re: FIRST FLIGHT N655HC >>=20 >> David,=20 >> =20 >> Congrats!!! Job well done. Terry Lutz... WOW! =20 >> =20 >> What was the OAT? I start to get nervous when my coolant temp goes above= 200 F. No reason to climb at WOT if not needed and OAT is high. =20 >> =20 >> Mark S. =20 >>=20 >> On Thu, Aug 30, 2012 at 6:07 PM, wrote: >> First flight for me anyhow not for the aircraft, Terry Lutz ( AKA;; worl= d renowned professional test pilot, flew in from France to do the First, Fir= st flight ) >> Temps went;; coolant 221 F max, oil 210 F max, on full throttle cli= me out up to 2000 ft., powered back from 6300 rpm to 5000 rpm/135 mph indica= ted, push the nose over to level off, pulled power back to 4500 rpm ( made n= o prop pitch changes at this time ) temps went down to;; coolant 195 F, = oil 190 F, this is without therm. & bypass blocked, also would like commen= ts about sealing around sides of both radiators, we saw the extra fins there= so we allowed air to pass through that area, may install a temp seal & rech= eck data points next flight. Then possibly install venting openings in botto= m of cowl to let more airflow out quicker. David R. Cook RV6A Rotary. >> From: "Joseph Pirch" >> To: hoursaway1@comcast.net, "rv man2010" >> Sent: Wednesday, August 29, 2012 8:40:58 PM >>=20 >>=20 >>=20 >>=20 >>=20 >> [image/jpeg:photo.JPG] >>=20 >>=20 >>=20 >>=20 >> Sent from my iPad >> =20 >=20 >=20 > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.2197 / Virus Database: 2437/5237 - Release Date: 08/31/12 --Apple-Mail-48ED4BBB-2DE9-4564-ACCC-B556CCCB94BD Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
It IS good to seal that ar= ea behind the spinner but for a different reason.   I was trying to imp= rove cooling one day and sealed around the neck of the drive.   Cooling= got ever so slightly worse but my airspeed at the rpm I was testing at go B= ETTER (by about 2 mph).  The reason was that the spinner was pumping ai= r out of the cowl at the spinner gap (mine was pretty big, about 1/2") and c= reating drag.  But since the air was being drawn from behind the rad, i= t improved cooling a little.  I was glad to make the trade because a so= lid 2 mph is harder to come by than the little bit of cooling that it gave u= p.

Tracy

Sent from my iPad

On A= ug 31, 2012, at 12:25 PM, "Bill Bradburry" <bbradburry@bellsouth.net> wrote:

=

I didn=E2=80=99t see any input when I l= ast asked this question, so I will try now that we are again talking about cooling.

 

How are you sealing around the PSRU out= let on the cowl?  I am talking about the area behind the spinner.  Thi= s area allows air to enter behind the heat exchangers and it seems to me that it would adv= ersely affect cooling.  This area is open on my plane because I haven=E2=80=99= t figured out how to seal it.  I am wondering what others have done?

 

Bill B

 

<= span style=3D"font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weig= ht:bold">From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson
Sent: Friday, August 31, 2012= 11:56 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: FIRS= T FLIGHT N655HC

 

Congratulations David,

 

I would completely seal any leaks around the sides= or anyplace else that could leak between duct inlet and radiator.  I read someplace that a 1/2"square hole could cost you 20% of your cooling effectiveness. 

 

A gent who once sold Subaru engine installations tried just sticking the radiator in back of the opening (no ducting) - did n= ot cool.

 

Yes, I find that getting the airflow up as soon as= safely possible will help a great deal in keeping temps down and bring them back down quickly.  My magic airspeed after take off is 120 MPH IAS the= n a 140 IAS for climbout.

 

Looking forward to more reports=

 

Ed

 

 

 

Sent: Friday, August 31, 2012 11:01 AM

Subject: [FlyRotary] Re: FIRST FLIGHT N655HC

 

Congratulations, David.  I hope t= o be following you soon.

Are you able to cool on the ground?  What did you do to improve the cooling between the two flights?


On 08/30/2012 10:48 PM, hoursaway1= @comcast.net wrote:

Thanks Mark, it was kind of anti-climatic for the others on the ground because they already saw that last month, but for me seeing the temps coming down at about the same stage as Terry saw them still climbing was comforting.  I'm setting up a= video camera to record the panel so I can focus on flying for now until I ge= t more comfortable.  We have a 100 mile radius to work with & I asked for & was granted a crew member during the flights that computer tuning will be worked on.  Tryed to get a stewardess= also but FAA said no.  ????    Yes I read Ed's procedure= for takeoff & our sys. is very similar so will use for next flights.  Terry is a member of our EAA Chapter 55 here in Mason MI,  his dad just flew his 400 th Young Eagle.           &nbs= p;            &n= bsp;            =               (  where is that stewardess with my Margarita )          David.

From: "Mark S= teitle" <msteitle@gmail.com>=
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, August 30, 20= 12 7:44:53 PM
Subject: [FlyRotary] Re: FIRS= T FLIGHT N655HC

David, 

 

Congrats!!!  Job well done.  Terry Lutz.= .. WOW!  

 

What was the OAT?  I start to get nervous whe= n my coolant temp goes above 200 F.  No reason to climb at WOT if not nee= ded and OAT is high.  

 

Mark S.   

On Thu, Aug 30, 2012 at 6:07 PM, <hour= saway1@comcast.net> wrote:

First flight for me anyhow not for the aircraft, Terry Lutz ( AKA;;  world renowned professional test pilot, flew in fro= m France<= /st1:country-region> to do the First, First flight )
Temps went;;   coolant 221 F  max,  oil 210 F  max,  on full throttle clime out up to 2000 ft., powered back from 6300= rpm to 5000 rpm/135 mph indicated, push the nose over to level off, pulled power back to 4500 rpm  ( made no prop pitch changes at this time )   temps went down to;;   coolant 195 F,  oil 190 F,  this is without therm. & bypass blocked, also would like commen= ts about sealing around sides of both radiators, we saw the extra fins there so= we allowed air to pass through that area, may install a temp seal & recheck= data points next flight. Then possibly install venting openings in bottom of= cowl to let more airflow out quicker.   David  R. Cook  RV6A  Rotary.

From: "Joseph= Pirch" <pirch@sbcglobal.net>
To: hoursaway1@comca= st.net, "rv man2010" <rv.man2010@hotmail.com>
Sent: Wednesday, August 29, 2= 012 8:40:58 PM





[image/jpeg:photo.JPG]




Sent from my iPad

 



No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.2197 / Virus Database: 2437/5237 - Release Date: 08/31/12

= --Apple-Mail-48ED4BBB-2DE9-4564-ACCC-B556CCCB94BD--