Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b6) with ESMTP id 190469 for flyrotary@lancaironline.net; Sat, 19 Jun 2004 20:32:46 -0400 Received: from EDWARD (clt25-78-058.carolina.rr.com [24.25.78.58]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i5K0WCPg000153 for ; Sat, 19 Jun 2004 20:32:13 -0400 (EDT) Message-ID: <000b01c4565e$0a8b4370$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Static port location Date: Sat, 19 Jun 2004 20:32:17 -0400 MIME-Version: 1.0 Content-Type: multipart/related; boundary="----=_NextPart_000_0007_01C4563C.834796F0"; type="multipart/alternative" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C4563C.834796F0 Content-Type: multipart/alternative; boundary="----=_NextPart_001_0008_01C4563C.834796F0" ------=_NextPart_001_0008_01C4563C.834796F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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 -------Original Message------- From: Rotary motors in aircraft Date: 06/19/04 15:33:42 To: Rotary motors in aircraft Subject: [FlyRotary] Re: Static port location Just for the record, when I did my GPS triangulation Airspeed = check, my indicated airspeed was 3 MPH high at around 190mph and within = one MPH at 120 MPH. I never checked out the stall speed, but it seems = within 2-3 MPH. Ed =20 =20 =20 ____________________________________________________ IncrediMail - Email has finally evolved - Click Here ------=_NextPart_001_0008_01C4563C.834796F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
You might get half of a pea (not = kidding - they=20 did this on the Spitfire in WWII) and try pasting approx 1/8" (final = distance=20 may vary)  behind  your fuselage static port.  This could = reduce=20 some of the "suction" that is causing your altimeter to read high by = building up=20 positive pressure in from of the pea  and increasing the pressure = at the=20 port.  Actually, the Brits stuck 1/2 peas on the Spitfire in an = attempt to=20 find out where flush rivets may a difference or not - so I = read.
 
Any half hemisphere, small object = work probably=20 do if you are fresh out of dried peas
Ed Anderson
RV-6A N494BW Rotary = Powered
Matthews,=20 NC
----- Original Message -----
From:=20 Bill = Eslick=20
Sent: Saturday, June 19, 2004 = 7:36=20 PM
Subject: [FlyRotary] Re: Static = port=20 location

 Ed,
 
I'd be real happy with that error.  Today I made a = static=20 probe and mounted it under the wing like the pitot probe.  = It has 8=20 holes, 1/16" diameter.  They are in pairs about 1/4" apart, = and=20 each pair is 90 degrees off the last pair. (Confused yet?)  = It is a=20 removable probe so that I can try different versions until I = find the=20 best.  This one is blunt-nosed (courtesy of J-B = Kwik).
 
This version reduced the altimeter error to 50-70 ft high = and the=20 indicated to around 7 KTs too high.
 
Not sure what to try for the next version.
 
Bill Eslick
 
-------Original=20 Message-------
 
From: Rotary motors in=20 aircraft
Date: = 06/19/04=20 15:33:42
To: Rotary motors in=20 aircraft
Subject: = [FlyRotary]=20 Re: Static port location
 
Just for the record, when I = did my GPS=20 triangulation Airspeed check, my indicated airspeed was 3 MPH = high at=20 around 190mph and within one MPH at 120 MPH.  I never = checked out=20 the stall speed, but it seems within 2-3 MPH.
 
Ed
 
 
____________________________________________________
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