X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 10 Dec 2013 09:55:39 -0500 Message-ID: X-Original-Return-Path: Received: from fmailhost04.isp.att.net ([204.127.217.104] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTP id 6633054 for lml@lancaironline.net; Tue, 10 Dec 2013 08:55:29 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.217.104; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-145-16.mco.bellsouth.net[98.85.145.16]) by isp.att.net (frfwmhc04) with SMTP id <20131210135452H0400aoo83e>; Tue, 10 Dec 2013 13:54:52 +0000 X-Originating-IP: [98.85.145.16] From: "Bill Bradburry" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Re: Gap Seals X-Original-Date: Tue, 10 Dec 2013 08:54:58 -0500 X-Original-Message-ID: <2E7AD047D45848608C99829A82685439@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0066_01CEF585.81990DF0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Ac71rc26VA8iEAd0RDONbpT9NeTSPAAAGOmQ X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_0066_01CEF585.81990DF0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit This calculation should provide an accurate true airspeed. So, no the wind speed should not have an effect if it is the same during all 4 test runs. (however not likely that it would be exactly the same) if he had reported his true airspeed on each run, he could have made a determination as to the accuracy of his airspeed indicator. Bill _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Colyn Case Sent: Tuesday, December 10, 2013 8:43 AM To: Lancair Mailing List Subject: [LML] Re: Gap Seals Doesn't it work out that your average on a windy day is lower than the average on a calm day? (there's always some x-wind effect on each of the 4 headings) On Dec 9, 2013, at 5:10 PM, Douglas Brunner wrote: I have been interested in how much extra speed I can get out of my Legacy using gap seals and other similar aerodynamic "tricks". Today I ran the plane in the "Before" condition. Tomorrow, I intend to put on gap seals and change out my cowl rings to a more aerodynamic pair. Here is today's result: Legacy Speed Test - N241DB Heading Ground Speed Date 12/9/13 30 252 Alt 8,000 ft OAT 63 Deg. F 300 232 RPM 2,600 MAP 23.3 inches 210 221 Fuel Flow 18.5 GPH Peak EGT 1,275 Deg. F 120 242 EGT 1,175 Deg. F 236.75 kts Any bets on the improvement with gap seals, etc? I am guessing 4 knots. D. Brunner N241DB 700 hrs ------=_NextPart_000_0066_01CEF585.81990DF0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

This calculation should provide an accurate true airspeed. So, no the wind speed should not have an = effect if it is the same during all 4 test runs. (however not likely that = it would be exactly the same) if he had reported his true airspeed on = each run, he could have made a determination as to the accuracy of his = airspeed indicator.

Bill

From: = Lancair Mailing List = [mailto:lml@lancaironline.net] On Behalf Of Colyn Case
Sent: Tuesday, December = 10, 2013 8:43 AM
To: Lancair Mailing List
Subject: [LML] Re: Gap = Seals

Doesn't it work out that your average on a windy day is lower = than the average on a calm day?

(there's always some x-wind effect on each of the 4 = headings)

On Dec 9, 2013, at 5:10 PM, Douglas Brunner = wrote:

I have been interested in how much extra speed I can get out of my Legacy using gap = seals and other similar aerodynamic = “tricks”.

=

Today I ran = the plane in the “Before” condition. Tomorrow, I intend to = put on gap seals and change out my cowl rings to a more aerodynamic = pair.

=

Here is today’s result:

=

Legacy Speed Test – = N241DB

	Heading		Ground Speed		Date = 12/9/13

	30		252		Alt	8,000	ft
					OAT	63	Deg. F
	300		232		RPM	2,600
					MAP	23.3	inches
	210		221		Fuel Flow	18.5	GPH
					Peak EGT	1,275	Deg. F
	120		242		EGT	1,175	Deg. F

			236.75<= /o:p>	kts

=

Any bets on = the improvement with gap seals, etc? I am guessing 4 = knots.

=

D. = Brunner

N241DB 700 = hrs

------=_NextPart_000_0066_01CEF585.81990DF0--