Return-Path: Received: from [65.54.169.79] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2b6) with ESMTP id 191199 for flyrotary@lancaironline.net; Sun, 20 Jun 2004 19:12:58 -0400 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sun, 20 Jun 2004 16:12:28 -0700 Received: from 65.54.98.106 by bay3-dav49.bay3.hotmail.com with DAV; Sun, 20 Jun 2004 23:12:28 +0000 X-Originating-IP: [65.54.98.106] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Static port location Date: Sun, 20 Jun 2004 19:12:27 -0400 MIME-Version: 1.0 Content-Type: multipart/related; type="multipart/alternative"; boundary="----=_NextPart_000_00C9_01C456FA.86D0F370" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.00.0013.2101 Seal-Send-Time: Sun, 20 Jun 2004 19:12:27 -0400 Message-ID: X-OriginalArrivalTime: 20 Jun 2004 23:12:28.0673 (UTC) FILETIME=[0E790710:01C4571C] This is a multi-part message in MIME format. ------=_NextPart_000_00C9_01C456FA.86D0F370 Content-Type: multipart/alternative; boundary="----=_NextPart_001_00CA_01C456FA.86D0F370" ------=_NextPart_001_00CA_01C456FA.86D0F370 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: Bill Eslick=20 To: Rotary motors in aircraft=20 Sent: Saturday, June 19, 2004 11:17 PM Subject: [FlyRotary] Re: Static port location Ed, Sounds like a do-able mod. Won't get any experimenting done = this week though, as I am off to Mojave to watch the ultimate = experimenter, Mr. Rutan, create an astronaut. You can check it out at = www.scaled.com=20 Bill Eslick -------Original Message------- From: Rotary motors in = aircraft Date: 06/19/04 19:36:17 To: Rotary motors in = aircraft Subject: [FlyRotary] Re: Static port location You might get half of a pea (not kidding - they did this on the = Spitfire in WWII) and try pasting approx 1/8" (final distance may vary) = behind your fuselage static port. This could reduce some of the = "suction" that is causing your altimeter to read high by building up = positive pressure in from of the pea and increasing the pressure at the = port. Actually, the Brits stuck 1/2 peas on the Spitfire in an attempt = to find out where flush rivets may a difference or not - so I read. Any half hemisphere, small object work probably do if you are = fresh out of dried peas Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: Bill Eslick=20 To: Rotary motors in = aircraft=20 Sent: Saturday, June 19, 2004 7:36 PM Subject: [FlyRotary] Re: Static port location Ed, I'd be real happy with that error. Today I made a static = probe and mounted it under the wing like the pitot probe. It has 8 = holes, 1/16" diameter. They are in pairs about 1/4" apart, and each = pair is 90 degrees off the last pair. (Confused yet?) It is a removable = probe so that I can try different versions until I find the best. This = one is blunt-nosed (courtesy of J-B Kwik). This version reduced the altimeter error to 50-70 ft high = and the indicated to around 7 KTs too high. Not sure what to try for the next version. Bill Eslick I'm surprised your ASI is that far off Bill. I'm using = the same pop rivet static ports (one each side) and the ASI has been = accurate to within 2 mph or less at all speeds I've checked. =20 Tracy =20 =20 =20 =20 =20 =20 ____________________________________________________ = IncrediMail - Email has finally evolved - Click = Here ------=_NextPart_001_00CA_01C456FA.86D0F370 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
----- Original Message -----
To: Rotary motors in = aircraft
Sent: Saturday, June 19, 2004 = 11:17=20 PM
Subject: [FlyRotary] Re: Static = port=20 location

Ed,
 
Sounds like a do-able mod.  Won't get any = experimenting=20 done this week though, as I am off to Mojave to watch the = ultimate=20 experimenter, Mr. Rutan, create an astronaut.  You can = check it out=20 at www.scaled.com
 
Bill Eslick
 
-------Original=20 Message-------
 
From: Rotary motors in=20 aircraft
Date: = 06/19/04=20 19:36:17
To: Rotary motors in=20 aircraft
Subject: = [FlyRotary]=20 Re: Static port location
 
 
You might get half of a pea = (not kidding=20 - they did this on the Spitfire in WWII) and try pasting approx = 1/8"=20 (final distance may vary)  behind  your fuselage = static=20 port.  This could reduce some of the "suction" that is = causing your=20 altimeter to read high by building up positive pressure in from = of the=20 pea  and increasing the pressure at the port.  = Actually, the=20 Brits stuck 1/2 peas on the Spitfire in an attempt to find out = where=20 flush rivets may a difference or not - so I read.
 
Any half hemisphere, small = object work=20 probably do if you are fresh out of dried peas
Ed Anderson
RV-6A N494BW Rotary=20 Powered
Matthews, NC
----- Original Message ----- =
From:=20 Bill=20 Eslick
To: Rotary motors in = aircraft=20
Sent: Saturday, June 19, = 2004 7:36=20 PM
Subject: [FlyRotary] Re: = Static=20 port location

 Ed,
 
I'd be real happy with that error.  Today I made = a=20 static probe and mounted it under the wing like the pitot=20 probe.  It has 8 holes, 1/16" diameter.  They = are in=20 pairs about 1/4" apart, and each pair is 90 degrees off = the last=20 pair. (Confused yet?)  It is a removable probe so = that I can=20 try different versions until I find the best.  This = one is=20 blunt-nosed (courtesy of J-B Kwik).
 
This version reduced the altimeter error to 50-70 ft = high and=20 the indicated to around 7 KTs too high.
 
Not sure what to try for the next version.
 
Bill Eslick
 
I'm surprised your ASI is = that far=20 off Bill.   I'm using the same pop rivet static = ports=20 (one each side) and the ASI has been accurate to within 2 = mph or=20 less at all speeds I've checked.  
 
Tracy
 
 
____________________________________________________
  IncrediMail - Email has finally = evolved -=20 Click=20 = Here
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