X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta08.westchester.pa.mail.comcast.net ([76.96.62.80] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5524823 for flyrotary@lancaironline.net; Sun, 06 May 2012 08:56:56 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.62.80; envelope-from=wschertz@comcast.net Received: from omta22.westchester.pa.mail.comcast.net ([76.96.62.73]) by qmta08.westchester.pa.mail.comcast.net with comcast id 6cJQ1j0021ap0As58cwQx4; Sun, 06 May 2012 12:56:24 +0000 Received: from WschertzPC ([71.57.77.95]) by omta22.westchester.pa.mail.comcast.net with comcast id 6cwP1j00j23NHuF3icwPjd; Sun, 06 May 2012 12:56:23 +0000 Message-ID: From: "Bill Schertz" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Chris cooling issue - was - Twin Velocity Date: Sun, 6 May 2012 07:56:22 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0035_01CD2B5D.BA6645B0" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 This is a multi-part message in MIME format. ------=_NextPart_000_0035_01CD2B5D.BA6645B0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Chris, Try taking some used engine oil, and put a several lines across the cowl = and then go high speed taxi, take a look and you can see how the air is = flowing around your inlets and exits. Friend of mine had similar issues = and found that air was flowing backwards into exit.=20 In one configuration he had the NACA scoops on top of the cowl, and = found that vortex generators in front of the NACA=E2=80=99S helped . Strongly advocate using a water manometer to measure pressure above and = below the engine to document what each change does for you. Otherwise = you are shooting in the dark. Bill Schertz KIS Cruiser #4045 N343BS Phase one testing Completed From: Dave=20 Sent: Sunday, May 06, 2012 7:44 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Twin Velocity Chris,=20 Do you still have the armpits as well as the NACA's? You may need = more exit space/area in order to get adequate cooling at low speed. In = other words, cowl flaps. Just a thought. Dave Staten On 5/5/2012 10:03 AM, Chris Barber wrote:=20 I want to but I am having some serious cooling issues on high speed = taxi, up to over 250 degrees for a few minutes (yikes). I tried = something with modified NACA's based on Velocity Inc reducing cooling = issues when they changed from armpit scoops to top NACA's, however, that = is not working so I am going to a more direct ram air with a P-51 scoop. = I hope to start the conversion later today. The process may have = intimidated me years ago, but, hey, the Gov'ment says I be a "Repairman" = ;-) Chris -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [flyrotary@lancaironline.net] on = behalf of Bill Bradburry [bbradburry@bellsouth.net] Sent: Saturday, May 05, 2012 9:56 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Twin Velocity Are you ready to take advantage of that transition training? When is = the first flight? :>) Bill B -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Chris Barber Sent: Saturday, May 05, 2012 10:06 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Twin Velocity It's a kewl plane. I got to see it when I was at the factory last = month for transition training.=20 Chris Sent from my iPhone 4 On May 4, 2012, at 7:03 PM, "Kelly Troyer" wrote: Group, This thing is just begging for two 13B or Renesis Rotary engines = !!..........................<:) http://www.velocityaircraft.com/airplane-models-vtwin.html V-Twin Video - www.vimeo.com/39171839 --=20 Kelly Troyer Dyke Delta_"Eventually" 13B_RD1C_EC2_EM2 ------=_NextPart_000_0035_01CD2B5D.BA6645B0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Chris,
Try taking some used engine oil, and put a several lines across the = cowl=20 and then go high speed taxi, take a look and you can see how the air is = flowing=20 around your inlets and exits. Friend of mine had similar issues and = found that=20 air was flowing backwards into exit.
 
In one configuration he had the NACA scoops on top of the cowl, and = found=20 that vortex generators in front of the NACA=E2=80=99S helped .
 
Strongly advocate using a water manometer to measure pressure above = and=20 below the engine to document what each change does for you. Otherwise = you are=20 shooting in the dark.
 
Bill=20 Schertz
KIS Cruiser #4045
N343BS
Phase one testing = Completed
 
From: Dave
Sent: Sunday, May 06, 2012 7:44 AM
Subject: [FlyRotary] Re: Twin Velocity
 
Chris,=20
    Do you still have the armpits as well as the = NACA's? You=20 may need more exit space/area in order to get adequate cooling at low = speed. In=20 other words, cowl flaps. Just a thought.

Dave Staten

On = 5/5/2012=20 10:03 AM, Chris Barber wrote:=20

I want to but I am having some serious cooling issues on high speed = taxi,=20 up to over 250 degrees for a few minutes (yikes).  I tried = something with=20 modified NACA's based on Velocity Inc reducing cooling issues when = they=20 changed from armpit scoops to top NACA's, however, that is not working = so I am=20 going to a more direct ram air with a P-51 scoop.  I hope to = start the=20 conversion later today.  The process may have intimidated me = years ago,=20 but, hey, the Gov'ment says I be a "Repairman" ;-)

 

Chris

From: Rotary motors in aircraft [flyrotary@lancaironline.net] on=20 behalf of Bill Bradburry [bbradburry@bellsouth.net]Sent:=20 Saturday, May 05, 2012 9:56 AM
To: Rotary motors in=20 aircraft
Subject: [FlyRotary] Re: Twin = Velocity

Are you = ready to take=20 advantage of that transition training?  When is the first = flight? =20 :>)

 

Bill=20 B

 

From: Rotary=20 motors in aircraft [mailto:flyrotary@lancaironlin= e.net]=20 On Behalf Of Chris=20 Barber
Sent: = Saturday, May=20 05, 2012 10:06 AM
To: Rotary=20 motors in aircraft
Subject:=20 [FlyRotary] Re: Twin Velocity

 

It's a kewl plane. I got to see it when I = was at the=20 factory last month for transition training.

 

Chris

Sent from my iPhone=20 4


On May 4, = 2012, at=20 7:03 PM, "Kelly Troyer" <keltro@gmail.com> = wrote:

Group,

 

    This thing is just = begging for=20 two 13B or Renesis Rotary engines=20 !!..........................<:)

 

http://www.velocityaircraft.com/airplane-models-= vtwin.html

 

 

V-Twin Video - www.vimeo.com/39171839

--=20
Kelly Troyer
Dyke=20 = Delta_"Eventually"
13B_RD1C_EC2_EM2


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