X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta01.emeryville.ca.mail.comcast.net ([76.96.30.16] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTP id 5025344 for flyrotary@lancaironline.net; Sun, 19 Jun 2011 15:09:27 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.30.16; envelope-from=hoursaway1@comcast.net Received: from omta03.emeryville.ca.mail.comcast.net ([76.96.30.27]) by qmta01.emeryville.ca.mail.comcast.net with comcast id xv8Y1g0020b6N64A1v8ryj; Sun, 19 Jun 2011 19:08:51 +0000 Received: from sz0081.ev.mail.comcast.net ([76.96.26.137]) by omta03.emeryville.ca.mail.comcast.net with comcast id xv8s1g00E2xV6SL8Pv8sin; Sun, 19 Jun 2011 19:08:52 +0000 Date: Sun, 19 Jun 2011 19:08:52 +0000 (UTC) From: hoursaway1@comcast.net To: Rotary motors in aircraft Message-ID: <630230230.1773606.1308510532339.JavaMail.root@sz0081a.emeryville.ca.mail.comcast.net> In-Reply-To: Subject: Re: [FlyRotary] Re: Blower does work MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_1773605_2132316138.1308510532338" X-Originating-IP: [76.20.183.130] X-Mailer: Zimbra 6.0.5_GA_2431.RHEL5_64 (ZimbraWebClient - IE8 (Win)/6.0.5_GA_2427.RHEL4) ------=_Part_1773605_2132316138.1308510532338 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable My notes are at the hanger, by memory I think the numbers were 5850rpm, 29.= 5 MAP high RPM on 68" three blade Ivoprop at 920 ft. above sea level, OAT a= prox. 68F.=C2=A0 Am flying an RV7A with a Subi eng. also has Ivoprop & your= brake upgrade sounds like somthing we will look into later, thanks for the= tip. As for first flight=C2=A0 I would go now if temp readings were solved= , MI=C2=A0is having great weather right now.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 =C2=A0=C2=A0 David R. Cook=C2=A0 RV6A=C2=A0 Rotary=20 ----- Original Message -----=20 From: "Ed Anderson" =20 To: "Rotary motors in aircraft" =20 Sent: Sunday, June 19, 2011 12:23:09 PM=20 Subject: [FlyRotary] Re: Blower does work=20 Sounds like you are there - look like decision time it near - like - when t= o launch?=20 David, you indicated you could go higher on static if tied down.=C2=A0 What= is your max static rpm and manifold pressure.=C2=A0 The reason I asked is = when Tracy and I got it sorted out when using the 2.17:1, we could normally= get around 5200 rpm static with a 68x72 prop.=C2=A0 Your elevation and pro= p certain is a factor.=20 By the way, I upgraded my Rv-6A brakes and rotors.=C2=A0 My rotor are twice= the thickness of the normal Rv-6A rotor - this has eliminated brake fade, = reduce brake pad wear, and has given a solid feel to the brakes - oh, yes, = it stops quicker.=C2=A0 I always say its one thing if you can't get started= - its an whole other ball game, if you can't get stopped {:>)=20 Any idea when you plan on taking your bird aloft??=20 Ed=20 From: hoursaway1@comcast.net=20 Sent: Sunday, June 19, 2011 10:52 AM=20 To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Blower does work=20 RV6A,=C2=A0 1140#, =C2=A013B, RWS EC2, EM2, -B-drive 2.17 to 1 ?=C2=A0 with= 20" intake runners, =C2=A0home made Dynamic Chamber w/curved back,=C2=A0 3= " throttle-body from 2000 Cadillac Deville Northstar=C2=A0 4.6L eng., =C2= =A0exhaust aprox. 2" into=C2=A0 3" X 36" into Hushpower muff.,=C2=A0 standa= rd Cleveland brakes from Vans Aircraft,=C2=A0 at 4700 rpm & aprox. 26 MAP,= =C2=A0 I can not hold the aircraft from moving unless I tie it off to=C2=A0= my truck & I can go higher in power.=C2=A0 =C2=A0=C2=A0=C2=A0 David R. Cook= =C2=A0=C2=A0 RV6A Rotary ( transition training nearly complete,=C2=A0 =C2= =A0I feel ready to go )=C2=A0=20 ----- Original Message -----=20 From: "Bill Bradburry" =20 To: "Rotary motors in aircraft" =20 Sent: Saturday, June 18, 2011 9:18:32 AM=20 Subject: [FlyRotary] Re: Blower does work=20 Hmmm!=C2=A0 Unless your blower is a restriction, the MAP will go to ambient= pressure (100 Kp?) if you go to WOT.=20 If you fix that prop so that it is moving air, you need to look at some of = the pictures of Tracy when he is running his engine!=C2=A0 Even his ears ar= e pinned back!=C2=A0 :>)=C2=A0 =C2=A0Think dog hanging our of a car window = at 100 MPH.=C2=A0 Sorry Tracy!!=C2=A0 :>)=20 You will need to tie that laptop down or it will be in the next county!=20 Bill B=20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Ernest Christley=20 Sent: Friday, June 17, 2011 11:57 PM=20 To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Blower does work=20 On 06/17/2011 07:10 PM, Bill Bradburry wrote:=20 If the prop load was maxed out, the rpm would not increase, but the MAP cou= ld go up.=C2=A0 It sounds, tho, like this might not have been the case sinc= e Earnest felt the prop was not pulling.=20 Bill B=20 First, the prop definitely was not pulling with any significance.=C2=A0 The= most it could do was scare my wife, and blow over a fan that I had sitting= on top of a 5-gallon bucket.=C2=A0 I'll fix that this weekend.=20 Second, if the prop limits rpm, the MAP will not continue to increase.=C2= =A0 The blower is tied to the prop with a 3.18 gear ratio.=C2=A0 Since it w= on't turn any faster, it won't be able to raise the MAP any further. ------=_Part_1773605_2132316138.1308510532338 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit
My notes are at the hanger, by memory I think the numbers were 5850rpm, 29.5 MAP high RPM on 68" three blade Ivoprop at 920 ft. above sea level, OAT aprox. 68F.  Am flying an RV7A with a Subi eng. also has Ivoprop & your brake upgrade sounds like somthing we will look into later, thanks for the tip. As for first flight  I would go now if temp readings were solved, MI is having great weather right now.           David R. Cook  RV6A  Rotary
----- Original Message -----
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, June 19, 2011 12:23:09 PM
Subject: [FlyRotary] Re: Blower does work

Sounds like you are there - look like decision time it near - like - when to launch?
David, you indicated you could go higher on static if tied down.  What is your max static rpm and manifold pressure.  The reason I asked is when Tracy and I got it sorted out when using the 2.17:1, we could normally get around 5200 rpm static with a 68x72 prop.  Your elevation and prop certain is a factor.
 
By the way, I upgraded my Rv-6A brakes and rotors.  My rotor are twice the thickness of the normal Rv-6A rotor - this has eliminated brake fade, reduce brake pad wear, and has given a solid feel to the brakes - oh, yes, it stops quicker.  I always say its one thing if you can't get started - its an whole other ball game, if you can't get stopped {:>)
 
Any idea when you plan on taking your bird aloft??
 
Ed

Sent: Sunday, June 19, 2011 10:52 AM
Subject: [FlyRotary] Re: Blower does work

RV6A,  1140#,  13B, RWS EC2, EM2, -B-drive 2.17 to 1 ?  with 20" intake runners,  home made Dynamic Chamber w/curved back,  3" throttle-body from 2000 Cadillac Deville Northstar  4.6L eng.,  exhaust aprox. 2" into  3" X 36" into Hushpower muff.,  standard Cleveland brakes from Vans Aircraft,  at 4700 rpm & aprox. 26 MAP,  I can not hold the aircraft from moving unless I tie it off to my truck & I can go higher in power.      David R. Cook   RV6A Rotary ( transition training nearly complete,   I feel ready to go ) 
----- Original Message -----
From: "Bill Bradburry" <bbradburry@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, June 18, 2011 9:18:32 AM
Subject: [FlyRotary] Re: Blower does work

Hmmm!  Unless your blower is a restriction, the MAP will go to ambient pressure (100 Kp?) if you go to WOT.

 

If you fix that prop so that it is moving air, you need to look at some of the pictures of Tracy when he is running his engine!  Even his ears are pinned back!  :>)   Think dog hanging our of a car window at 100 MPH.  Sorry Tracy!!  :>)

You will need to tie that laptop down or it will be in the next county!

 

Bill B

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ernest Christley
Sent: Friday, June 17, 2011 11:57 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Blower does work

 

On 06/17/2011 07:10 PM, Bill Bradburry wrote:

If the prop load was maxed out, the rpm would not increase, but the MAP could go up.  It sounds, tho, like this might not have been the case since Earnest felt the prop was not pulling.

 

Bill B

 

First, the prop definitely was not pulling with any significance.  The most it could do was scare my wife, and blow over a fan that I had sitting on top of a 5-gallon bucket.  I'll fix that this weekend.

Second, if the prop limits rpm, the MAP will not continue to increase.  The blower is tied to the prop with a 3.18 gear ratio.  Since it won't turn any faster, it won't be able to raise the MAP any further.

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