X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 28 Aug 2014 08:05:04 -0400 Message-ID: X-Original-Return-Path: Received: from nk11p08mm-asmtp002.mac.com ([17.158.58.247] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTPS id 7118495 for lml@lancaironline.net; Thu, 28 Aug 2014 07:48:26 -0400 Received-SPF: pass receiver=logan.com; client-ip=17.158.58.247; envelope-from=gw5@me.com Received: from [192.168.0.9] ([71.77.249.52]) by nk11p08mm-asmtp002.mac.com (Oracle Communications Messaging Server 7u4-27.10(7.0.4.27.9) 64bit (built Jun 6 2014)) with ESMTPSA id <0NB000HRUM3PA3B0@nk11p08mm-asmtp002.mac.com> for lml@lancaironline.net; Thu, 28 Aug 2014 11:47:51 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.12.52,1.0.27,0.0.0000 definitions=2014-08-28_01:2014-08-27,2014-08-27,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=2 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1402240000 definitions=main-1408280138 From: George Wehrung Content-type: multipart/alternative; boundary="Apple-Mail=_F12DBD4A-D3EE-46A6-AB99-A2CB4B2AF2F0" X-Original-Message-id: <166D65C2-6277-4F3C-B002-C4B550D97662@me.com> MIME-version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Subject: Re: [LML] LNC4 POH X-Original-Date: Thu, 28 Aug 2014 07:47:50 -0400 References: X-Original-To: Lancair Mailing List In-reply-to: X-Mailer: Apple Mail (2.1878.6) --Apple-Mail=_F12DBD4A-D3EE-46A6-AB99-A2CB4B2AF2F0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 I like it! It also looks similar to the data that ForeFlight is = offering? On Aug 27, 2014, at 8:31 PM, Carl Scheid wrote: > For phase 1 flight testing we developed a spread sheet model that = tabulates performance versus altitude. Inputs included LIV and test = parameters. Model performance was made to reflect test performance by = tweaking lift efficiency, propeller efficiency and parasite drag = coefficient. The result was a model specific for our normally aspirated = N304R. Application to a turbo version would only require the addition = of engine altitude performance. >=20 > Data collection was made easy through use of Cloud Ahoy. This free = service provides runway and flight tracking data that includes wind, = ground speed, TAS and ROC. The only flight data that=92s needed to be = recorded was pressure altitude, OAT and IAS. >=20 > This model was useful for converting test data to the standard data = required for the POH. For example we were able to do better than = commercial manuals by providing climb data for various weights and = speeds. For example I was able to generate the following climb and = cruise data versus weight. >=20 > N304R CLIMB AND CRUISE@ 2500 RPM, FULL THROTTLE WITH CLIMB @ 135 KIAS > WEIGHT LB > CEILING* FT > BHP % > GPH > CRUISE KTAS > NM/GAL > 2500 > 17200 > 54.3 > 11.5 > 197 > 17.1 > 2900 > 15300 > 59.3 > 12.3 > 196 > 15.9 > 3300 > 13300 > 64.7 > 13.2 > 195 > 14.8 > =B7 ISA Altitude for 300 ft/min ROC >=20 > Carl >=20 > carlscheid@att.net >=20 --Apple-Mail=_F12DBD4A-D3EE-46A6-AB99-A2CB4B2AF2F0 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 I like = it!  It also looks similar to the data that ForeFlight is = offering?


On Aug 27, 2014, = at 8:31 PM, Carl Scheid <carlscheid@att.net> = wrote:

For phase 1 flight testing we = developed a spread sheet=20 model that tabulates performance versus altitude. Inputs included LIV = and test=20 parameters. Model performance was made to reflect test performance by = tweaking=20 lift efficiency, propeller efficiency and parasite drag coefficient. The = result=20 was a model specific for our normally aspirated N304R.  Application to a turbo version = would only=20 require the addition of engine altitude performance.

Data collection was made easy = through use of Cloud Ahoy.=20 This free service provides runway and flight tracking data that includes = wind,=20 ground speed, TAS and ROC. The only flight data that=92s needed to be = recorded was=20 pressure altitude, OAT and IAS.

This model was useful for converting test data = to the=20 standard data required for the POH. For example we were able to do = better than=20 commercial manuals by providing climb data for various weights and = speeds. For=20 example I was able to generate the following climb and cruise data = versus=20 weight.

N304R CLIMB AND CRUISE@ 2500=20 RPM, FULL THROTTLE WITH CLIMB @ 135 KIAS
WEIGHT LB
CEILING* = FT
BHP = %
GPH
CRUISE = KTAS
NM/GAL
2500
17200
54.3
11.5
197
17.1
2900
15300
59.3
12.3
196
15.9
3300
13300
64.7
13.2
195
14.8

=B7        =20 ISA = Altitude=20 for 300 ft/min ROC

Carl=20

carlscheid@att.net

<= /div>

= --Apple-Mail=_F12DBD4A-D3EE-46A6-AB99-A2CB4B2AF2F0--