Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Tue, 21 Dec 2004 17:08:07 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d05.mx.aol.com ([205.188.157.37] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 575757 for lml@lancaironline.net; Tue, 21 Dec 2004 16:26:16 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.157.37; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d05.mx.aol.com (mail_out_v37_r3.8.) id q.cf.1e887588 (4238) for ; Tue, 21 Dec 2004 16:25:44 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Tue, 21 Dec 2004 16:25:44 EST Subject: An Inch Is Not The Inch It Used To Be! X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1103664343" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1103664343 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit OK, OK - I suspended preparations for our Christmas Celebration and went for a flight. See Email to MoonDog Re Data Recording Protocol. 1. Lancair 320, IO 320, 9:1 Pistons, Unfiltered Ram air, LASAR Ignition, Pitot fed shrouded injectors, S-Tec 50 AP, RMI Air Data, VM EPI 800 Engine data, Garmin 530, Dual Static ports and Calibrated airspeed, MAP sensor not calibrated. Gross Wt was about 1675, CG 25.4 2. OAT -3C, Dew Pt -12C, Baro 29.86", MAP 29.1 3. a. 12500 MSL, Palt 12540, Dalt 12630, AP alt hold engaged thru all measurements, 2500 RPM used and 100* ROP (for Me, approx 1320 EGT used thoughout + or - 100*F . WOT, 19.7" MAP, 7.3 gph, 157 IAS, -5C OAT, 189 TAS, -9C TAT 18.7 " MAP, 6.9 gph, 154 IAS, -6C OAT, 186 TAS, -10C TAT 3 KTS lost Also, note that I did not change the mixture in these MAP tests. I was heading West and all work was done in smooth air. 3. b. I then spiraled down to 9500 and headed East letting things stabilize. So, at 9500 MSL, 9560 Palt, 9320 Dalt, then as in 3.a. WOT, 22.1" MAP, 8.5 gph, 170 IAS, -3C OAT, 195 TAS, -6C TAT and 250 Knot Ground Speed 21.1" MAP, 8.0 gph, 165 IAS, -3C OAT, 188 TAS, -6C TAT then, I had to turn South as I was going to enter ORD airspace, jammed the throttle in and took another reading WOT, 22.1" MAP, 169 IAS, 193 TAS ~ 5 Kts lost. Also, note that the WOT MAP increased by 2.4" with a drop in 3000 altitude. This is consistent with the standard atmosphere pressure change from 12,500 to 9,500 (18.66-->20.98), 2.32" Hg. BTW, the Baro and temps at altitude were very close to standard. -------------------------------1103664343 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

OK, OK - I suspended preparations for our Christmas Celebration and wen= t=20 for a flight.

See Email to MoonDog Re Data Recording Protocol.

1. Lancair 320, IO 320, 9:1 Pistons, Unfiltered Ram air, LASAR Ignition= ,=20 Pitot fed shrouded injectors, S-Tec 50 AP, RMI Air Data, VM EPI 800 Engine d= ata,=20 Garmin 530, Dual Static ports and Calibrated airspeed, MAP sensor not=20 calibrated. Gross Wt was about 1675, CG 25.4

2. OAT -3C, Dew Pt -12C, Baro 29.86", MAP 29.1

3. a. 12500 MSL, Palt 12540, Dalt 12630, AP alt hold engaged thru all=20 measurements, 2500 RPM used and 100* ROP (for Me, approx 1320 EGT used=20 thoughout + or - 100*F .

WOT, 19.7" MAP, 7.3 gph, 157 IAS, -5C OAT, 189 TAS, -9C TAT

18.7 " MAP, 6.9=20= gph,=20 154 IAS, -6C OAT, 186 TAS, -10C TAT

3 KTS lost Also, note that I did not change the mixture in these=20= MAP=20 tests. I was heading West and all work was done in smooth air.

3. b. I then spiraled down to 9500 and headed East letting things=20 stabilize. So, at 9500 MSL, 9560 Palt, 9320 Dalt, then as in 3.a.

WOT, 22.1" MAP, 8.5 gph, 170 IAS, -3C OAT, 195 TAS, -6C TAT and 250=20 Knot Ground Speed

21.1" MAP, 8.0 gph, 16= 5=20 IAS, -3C OAT, 188 TAS, -6C TAT

then, I had to turn South as I was going to enter ORD airspace, jammed=20= the=20 throttle in and took another reading

WOT, 22.1" MAP, 169 IAS, 193 TAS

~ 5 Kts lost.

Also, note that the WOT MAP increased by 2.4" with a drop in 3000=20 altitude. This is consistent with the standard atmosphere pressure cha= nge=20 from 12,500 to 9,500 (18.66-->20.98), 2.32" Hg. BTW, the Baro and t= emps=20 at altitude were very close to standard.

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