X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 22 Jan 2013 15:47:40 -0500 Message-ID: X-Original-Return-Path: Received: from imr-db02.mx.aol.com ([205.188.91.96] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTP id 6024317 for lml@lancaironline.net; Tue, 22 Jan 2013 15:39:30 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.91.96; envelope-from=Sky2high@aol.com Received: from mtaomg-mb05.r1000.mx.aol.com (mtaomg-mb05.r1000.mx.aol.com [172.29.41.76]) by imr-db02.mx.aol.com (Outbound Mail Relay) with ESMTP id C76821C000041 for ; Tue, 22 Jan 2013 15:38:55 -0500 (EST) Received: from core-mte004c.r1000.mail.aol.com (core-mte004.r1000.mail.aol.com [172.29.236.77]) by mtaomg-mb05.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id 658F2E000086 for ; Tue, 22 Jan 2013 15:38:55 -0500 (EST) From: Sky2high@aol.com Full-name: Sky2high X-Original-Message-ID: <11e95.679065da.3e3052df@aol.com> X-Original-Date: Tue, 22 Jan 2013 15:38:55 -0500 (EST) Subject: Re: [LML] Re: the Legacy RG Static ports X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_11e95.679065da.3e3052df_boundary" X-Mailer: AOL 9.6 sub 168 X-Originating-IP: [67.175.156.123] x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:436024096:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d294c50fef8df2ad1 --part1_11e95.679065da.3e3052df_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Joe, et al, The recommended static port position on a 320/360 as indicated by Lancair is merely a fuselage hole properly attached to static plumbing and located behind and below a rear window a specified amount. It is better if both sides of the aircraft are tapped for such static ports. This location has proved to be very accurate for me as I have had to originally reject port usage located on pitots - both an L shaped one and a Piper blade. Definitely perform the low altitude pass and TAS check if you have the capability. It's experimental.............. Grayhawk In a message dated 1/22/2013 2:25:49 P.M. Central Standard Time, joeczabaranek@gmail.com writes: I havent bothered to check indicated airspeed or my altimeter in my 360. My static ports are flush. They look like someone drilled a .010" hole through the paint/clear coat. Before you all added elevation to your static ports did you bother to check the altimeter? At 1000' MSL on a standard day, a .02" error in your static line would give a 20' baro altitude error AND a 1.5 KIAS error (at about 150 KIAS), IF your pitot line was measuring total pressure correctly. An indicated airspeed error could be more than just your static port ... A low pass at tower level to +/- 20' might be more accurate than trying to fly multiple legs of a course and measuring your KIAS to +/- 1.5 kts On Tue, Jan 22, 2013 at 12:25 PM, Dennis Johnson <_pinetownd@volcano.net_ (mailto:pinetownd@volcano.net) > wrote: I have a Legacy RG and put my static ports flush with the outer skin, located in accordance with the assembly manual. During my flight test phase, I pleasantly noticed that I always had a tailwind! I knew I was lucky to be flying such a wonderful airplane and just figured I was equally lucky to always have a tailwind. Eventually, logic prevailed and I realized nobody could be that lucky. I flew the four course GPS airspeed check and discovered that my indicated airspeed was reading low. I added a tiny piece of machined aluminum, similar to a domed head rivet, to both static ports and it solved the problem. Other Legacy builders who installed their static ports protruding slightly tell me that their indicated airspeed is accurate. Dennis Legacy 580 hours -- For archives and unsub _http://mail.lancaironline.net:81/lists/lml/List.html_ (http://mail.lancaironline.net:81/lists/lml/List.html) --part1_11e95.679065da.3e3052df_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
Joe, et al,
 
The recommended static port position on a 320/360 as indicated by= =20 Lancair is merely a fuselage hole properly attached to static plumbing= and=20 located behind and below a rear window a specified amount.  It is bett= er if=20 both sides of the aircraft are tapped for such static ports.
 
This location has proved to be very accurate for me as I have had to= =20 originally reject port usage located on pitots - both an L shaped one = and a=20 Piper blade.
 
Definitely perform the low altitude pass and TAS check if you hav= e the=20 capability.  It's experimental..............
 
Grayhawk 
 
In a message dated 1/22/2013 2:25:49 P.M. Central Standard Time,=20 joeczabaranek@gmail.com writes:
=
I havent bothered to check indicated airspeed or my altime= ter in=20 my 360.  My static ports are flush.  They look like someone dri= lled=20 a .010" hole through the paint/clear coat.  =20

Before you all added elevation to your static ports did you bother t= o=20 check the altimeter?  At 1000' MSL on a standard day, a .02" error i= n=20 your static line would give a 20' baro altitude error  AND a 1.5 KIA= S=20 error (at about 150 KIAS), IF your pitot line was measuring total pressur= e=20 correctly.  An indicated airspeed error could be more than just your= =20 static port ...

A low pass at tower level to +/- 20' might be more accurate than try= ing=20 to fly multiple legs of a course and measuring your KIAS to +/- 1.5=20 kts


On Tue, Jan 22, 2013 at 12:25 PM, Dennis Johnson= <pinetownd@volcano.net> wrote:
I have a Legacy RG and put my static ports flush with= the=20 outer skin, located in accordance with the assembly manual.  Durin= g my=20 flight test phase, I pleasantly noticed that I always had a tailwind!= =20  I knew I was lucky to be flying such a wonderful airplane and jus= t=20 figured I was equally lucky to always have a tailwind.

Eventuall= y,=20 logic prevailed and I realized nobody could be that lucky.  I flew= the=20 four course GPS airspeed check and discovered that my indicated airspee= d was=20 reading low.  I added a tiny piece of machined aluminum, similar t= o a=20 domed head rivet, to both static ports and it solved the problem.=20  Other Legacy builders who installed their static ports protruding= =20 slightly tell me that their indicated airspeed is=20 accurate.

Dennis
Legacy 580 hours

--
For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.= html

 --part1_11e95.679065da.3e3052df_boundary--