Return-Path: Received: from mxsf14.cluster1.charter.net ([209.225.28.214] verified) by logan.com (CommuniGate Pro SMTP 4.2b6) with ESMTP id 190562 for flyrotary@lancaironline.net; Sat, 19 Jun 2004 23:21:24 -0400 Received: from mxip17.cluster1.charter.net (mxip17a.cluster1.charter.net [209.225.28.147]) by mxsf14.cluster1.charter.net (8.12.11/8.12.11) with ESMTP id i5K3HpiP091114 for ; Sat, 19 Jun 2004 23:17:51 -0400 (EDT) Received: from 68.187.32.2.ts46v-21.grnbry.ftwrth.tx.charter.com (HELO dell) (68.187.32.2) by mxip17.cluster1.charter.net with SMTP; 19 Jun 2004 23:17:51 -0400 MIME-Version: 1.0 Message-Id: <40D501D0.000001.03856@DELL> Date: Sat, 19 Jun 2004 22:17:36 -0500 (Central Daylight Time) Content-Type: Multipart/related; type="multipart/alternative"; boundary="------------Boundary-00=_CT7LQL80000000000000" X-Mailer: IncrediMail (2501338) From: "Bill Eslick" References: To: Subject: Re: [FlyRotary] Re: Static port location X-FID: BA285063-5BCE-11D4-AF8D-0050DAC67E11 X-Priority: 3 --------------Boundary-00=_CT7LQL80000000000000 Content-Type: Multipart/Alternative; boundary="------------Boundary-00=_DT7LLVC0000000000000" --------------Boundary-00=_DT7LLVC0000000000000 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ed,=0D =0D 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. Rut= an, create an astronaut. You can check it out at www.scaled.com =0D =0D Bill Eslick=0D =0D -------Original Message-------=0D =0D From: Rotary motors in aircraft=0D Date: 06/19/04 19:36:17=0D To: Rotary motors in aircraft=0D Subject: [FlyRotary] Re: Static port location=0D =0D =0D 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 f= rom 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 rive= ts may a difference or not - so I read.=0D =0D Any half hemisphere, small object work probably do if you are fresh out o= f dried peas=0D Ed Anderson=0D RV-6A N494BW Rotary Powered=0D Matthews, NC=0D ----- Original Message ----- =0D From: Bill Eslick =0D To: Rotary motors in aircraft =0D Sent: Saturday, June 19, 2004 7:36 PM=0D Subject: [FlyRotary] Re: Static port location=0D =0D =0D Ed,=0D =0D I'd be real happy with that error. Today I made a static probe and mount= ed it under the wing like the pitot probe. It has 8 holes, 1/16" diameter.=20 They are in pairs about 1/4" apart, and each pair is 90 degrees off the l= ast pair. (Confused yet?) It is a removable probe so that I can try differen= t versions until I find the best. This one is blunt-nosed (courtesy of J-B Kwik).=0D =0D This version reduced the altimeter error to 50-70 ft high and the indicat= ed to around 7 KTs too high.=0D =0D Not sure what to try for the next version.=0D =0D Bill Eslick=0D =0D -------Original Message-------=0D =0D From: Rotary motors in aircraft=0D Date: 06/19/04 15:33:42=0D To: Rotary motors in aircraft=0D Subject: [FlyRotary] Re: Static port location=0D =0D 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.=0D =0D Ed=0D =0D =0D =0D =0D =0D =20 --------------Boundary-00=_DT7LLVC0000000000000 Content-Type: Text/HTML; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ed,
 
Sounds like a do-able mod.  Won't get any experimenting do= ne this week though, as I am off to Mojave to watch the ultimate experime= nter, Mr. Rutan, create an astronaut.  You can check it out at www.scaled.com
 
Bill Eslick
 
-------Original Message-------
 
Date: 06/19/04 19:= 36:17
Subject: [FlyRotar= y] Re: Static port location
 
 
You might get half of a pea (not kidd= ing - they did this on the Spitfire in WWII) and try pasting approx 1/8" = (final distance may vary)  behind  your fuselage static port.&n= bsp; This could reduce some of the "suction" that is causing your altimet= er 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 ma= y a difference or not - so I read.
 
Any half hemisphere, small object wor= k probably do if you are fresh out of dried peas
Ed Anderson
RV-6A N494BW Rotary Powered
Matthew= s, NC
----- Original Message -----
<= B>From: Bill Eslick
Sent: Saturday, June 19, 2004 7:36= PM
Subject: [FlyRotary] Re: Static po= rt 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 in= dicated to around 7 KTs too high.
 
Not sure what to try for the next version.
 
Bill Eslick
 
-------Original Message-------
 
Date: 06/19/04 15:= 33:42
Subject: [FlyRotar= y] Re: Static port location
 
Just for the record, when I did my GP= S triangulation Airspeed check, my indicated airspeed was 3 MPH high at a= round 190mph and within one MPH at 120 MPH.  I never checked out the= stall speed, but it seems within 2-3 MPH.
 
Ed
 
 
______________________= ______________________________
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