X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 09 Jan 2012 10:05:22 -0500 Message-ID: X-Original-Return-Path: Received: from [198.64.152.110] (HELO sdc.com) by logan.com (CommuniGate Pro SMTP 5.4.3) with ESMTP id 5342369 for lml@lancaironline.net; Sun, 08 Jan 2012 23:33:55 -0500 Received-SPF: pass receiver=logan.com; client-ip=198.64.152.110; envelope-from=Ronald@sdc.com Received: from [192.168.2.5] [68.202.62.243] by sdc.com with ESMTP (SMTPD-11.5) id 3a1400017e2fe708; Sun, 8 Jan 2012 23:29:18 -0500 From: Ronald STEVENS Mime-Version: 1.0 (Apple Message framework v1251.1) Content-Type: multipart/alternative; boundary="Apple-Mail=_6C34717C-C427-4C6F-8D1C-9BBA6694097B" Subject: Re: [LML] Lancair 4P power settings X-Original-Date: Sun, 8 Jan 2012 23:33:18 -0500 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <6E180EA3-9073-4CF7-B94B-849F77DC6040@sdc.com> X-Mailer: Apple Mail (2.1251.1) --Apple-Mail=_6C34717C-C427-4C6F-8D1C-9BBA6694097B Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1 Hi Jack The statement was just on the graphic, nothing more. And when I saw this = my neck hair was standing up lol And yes those numbers sounds correct to me, not to lean less than 150 = degrees ROP > 65% power. But I did see some numbers recently passing by = that are (in my humble opinion) very close to the danger zone, that is = why I was just mentioning this. Thanks again -- Ronald On Jan 8, 2012, at 8:50 PM, J H Webb wrote: >=20 > Hello Ronald, >=20 > I am at a loss figuring out what you are saying in sentence one. Oh = I found what you are referring to. Those numbers are just indications of = that fuel flow at that power but (the big but) if you read the TCM = manual carefully you will note that TCM does not recommend leaning below = 150 deg rich of peak above 65% power. The manual recommends any mixture = strength at and below 65% power. That number on the 75% number is just = for reference not a recommendation for normal operation. >=20 > Jack Webb > LIV L360 > Former Chief engineering Test Pilot > BSAE > From: Ronald STEVENS > To: lml@lancaironline.net=20 > Sent: Friday, January 6, 2012 1:09 PM > Subject: [LML] Re: Lancair 4P power settings >=20 > Hello Jack >=20 > I do not want to sound like an.......ass lol But on those chart you = have a statement that contradict with most 'experts' saying that 50% = Rich at 75% is precisely the wrong spot to be !! >=20 > So I would be careful using this chart running your engine. This might = be the 'old' chart they used to have before Gammi and the rest came up = with better numbers. For example at 50% you can set the mixture anywhere = without harming your engine etc etc.... >=20 > I guess TCM just wants to sell lots of cylinders LOL >=20 > =3D=3D Ronald (>130h lancair 4p, 1400h in others) >=20 > On Jan 6, 2012, at 7:44 AM, J H Webb wrote: >=20 >> Here is a power chart for the TSIO550 from TCM that I added red lines = and cleaned up a little as it did not scan well. >>=20 >> Jack Webb >> L360 LIV >> Years as engineering test pilot >>=20 >> From: Jay Phillips >> To: lml@lancaironline.net=20 >> Sent: Thursday, January 5, 2012 4:58 PM >> Subject: [LML] Re: Lancair 4P power settings >>=20 >> A first order approximation is to consider a linear relation exists = between >> MP, RPM, and power. >>=20 >> TCM says that 38.5" MP and 2700 RPM gives 100% power (350 hp) >>=20 >> Cruise setting of 31" MP and 2500 RPM thus gives (31/38.5) * = (2500/2700) =3D >> 74.5% or 261 hp >>=20 >> Another example: 28" MP and 2400 RPM: (28/38.5) * (2400/2700) =3D = 64.6% or 226 >> hp >>=20 >> So you can calculate the power with different settings, or choose you = power >> and back-calculate to determine the settings requried. >>=20 >> Jay Phillips >> Legacy N92SX >> IV-P N516DB >>=20 >>=20 >> -----Original Message----- >> From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf = Of Tony >> Ketelaars >> Sent: Thursday, January 05, 2012 12:00 PM >> To: lml@lancaironline.net >> Subject: [LML] Lancair 4P power settings >>=20 >> Can any one tell me what the MAP/RPM power settings are for the >> Lanceair 4P TSIO550 >> Like 60 - 65 - 70 - 75% >>=20 >> Thanks >>=20 >> Tony Ketelaars >>=20 >> -- >> For archives and unsub = http://mail.lancaironline.net:81/lists/lml/List.html >>=20 >>=20 >> -- >> For archives and unsub = http://mail.lancaironline.net:81/lists/lml/List.html >>=20 >>=20 >> -- >> For archives and unsub = http://mail.lancaironline.net:81/lists/lml/List.html >>=20 >=20 >=20 >=20 --Apple-Mail=_6C34717C-C427-4C6F-8D1C-9BBA6694097B Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=iso-8859-1 Hi = Jack

The statement was just on the graphic, nothing = more. And when I saw this my neck hair was standing up = lol

And yes those numbers sounds correct to me, = not to lean less than 150 degrees ROP > 65% power. But I did see some = numbers recently passing by that are (in my humble opinion) very close = to the danger zone, that is why I was just mentioning = this.

Thanks again -- = Ronald

On Jan 8, 2012, at 8:50 PM, J H Webb = wrote:


Hello = Ronald,

   I am at a loss figuring = out what you are saying in sentence one. Oh I found what you are = referring to. Those numbers are just indications of that fuel flow at = that power but (the big but) if you read the TCM manual carefully you = will note that TCM does not recommend leaning below 150 deg rich of peak = above 65% power. The manual recommends any mixture strength at and below = 65% power. That number on the 75% number is just for reference not a = recommendation for normal operation.

Jack = Webb
LIV L360
Former Chief engineering Test = Pilot
BSAE
From: Ronald STEVENS <Ronald@sdc.com>
To: lml@lancaironline.net
= Sent: Friday, January = 6, 2012 1:09 PM
Subject: [LML] Re: Lancair 4P power settings
=
Hello Jack

I do not = want to sound like an.......ass lol But on those chart you have a = statement that contradict with most 'experts' saying that 50% Rich at = 75% is precisely the wrong spot to be !!

So I = would be careful using this chart running your engine. This might be the = 'old' chart they used to have before Gammi and the rest came up with = better numbers. For example at 50% you can set the mixture anywhere = without harming your engine etc etc....

I guess = TCM just wants to sell lots of cylinders LOL

=3D=3D= Ronald (>130h lancair 4p, 1400h in = others)

On Jan 6, 2012, at 7:44 AM, J H = Webb wrote:

Here is a power chart for the TSIO550 from TCM that I added red lines and cleaned up a = little as it did not scan = well.

Jack = Webb
L360 LIV
Years as = engineering test pilot

=
=
From: = Jay Phillips <jayph@fastairplane.net>
= To: lml@lancaironline.net
= Sent: Thursday, January 5, 2012 4:58 PM
Subject: [LML] Re: Lancair 4P power = settings

A first order approximation is to consider a linear relation exists = between
MP, RPM, and power.

TCM says that 38.5" MP and 2700 = RPM gives 100% power (350 hp)

Cruise setting of 31" MP and 2500 = RPM thus gives (31/38.5) * (2500/2700) =3D
74.5% or 261 = hp

Another example: 28" MP and 2400 RPM: (28/38.5) * (2400/2700) = =3D 64.6% or 226
hp

So you can calculate the power with = different settings, or choose you power
and back-calculate to = determine the settings requried.

Jay Phillips
Legacy = N92SX
IV-P N516DB


-----Original Message-----
From: = Lancair Mailing List [mailto:lml@lancaironline.net] On = Behalf Of Tony
Ketelaars
Sent: Thursday, January 05, 2012 12:00 = PM
To: lml@lancaironline.net
Subject= : [LML] Lancair 4P power settings

Can any one tell me what the MAP/RPM power settings are = for the
Lanceair 4P TSIO550
Like 60 - 65 - 70 - = 75%

Thanks

Tony Ketelaars

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


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


=
<TSIO550 LIV manifold Vs RPM CB oct05.JPG>--
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