Return-Path: Received: from fed1rmmtao06.cox.net ([68.230.241.33] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 574084 for flyrotary@lancaironline.net; Mon, 20 Dec 2004 11:16:45 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.33; envelope-from=daveleonard@cox.net Received: from davidandanne ([68.111.224.107]) by fed1rmmtao06.cox.net (InterMail vM.6.01.04.00 201-2131-117-20041022) with SMTP id <20041220161608.YOWK17071.fed1rmmtao06.cox.net@davidandanne> for ; Mon, 20 Dec 2004 11:16:08 -0500 From: "DaveLeonard" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Turbo Calculator Date: Mon, 20 Dec 2004 08:16:25 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0032_01C4E66C.32D71770" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0032_01C4E66C.32D71770 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Dave, If you find the answers to those questions I sure would like to know. Best I can tell they are just made-up numbers to put a label on a particular package. Kind of like stage 2 street porting. Dave Leonard What I have yet to find is a good explanation of T03 Turbine "stages". The T03/hybrid turbo's listed for sale all have stage numbers (stage 1,2,3, etc) associated with them and I haven't quite figured out the difference (other than the overly simplistic/vague explanation that higher stages are for higher hp). Being a "why" kind of guy, I would like to be able to assimilate this properly. Watching, Waiting, Ebaying.. Dave Staten DaveLeonard wrote: Great overlay John. For some reason you plots seem to put this more in the surge region than with the data that I was using. I don't know what the difference is. Anyway, based on your initial conditions I decided that maybe going a little smaller (moving the overlay to the right) would be OK. And what do you know, I have been following a turbo on e-bay with a compressor between the v-trim and p-trim (slightly smaller) and I may just get it for $335. And it has a nice way to attach the exhaust - unlike that lame TO4 I bought from someone on this list that has no way to attach the exhaust(slip fit turbo's are everywhere and they suck - anyone want to buy one?) :) Dave Leonard That's better Dave I don't know Excel all that well, but I tried to make a few additions. I added a graph overlayed on the compressor map, then generated some plots by iterative data entry. There must be a way to generate the source data and plot it based on a table of MAP and altitude. This would help get closer to knowing what settings keeps us on the "island". Does this make any sense, or am I off on a wild goose chase? Hmmm. A wild goose at 15000 ft while at 46 MAP and 6500 rpm. I wonder where that would go on the chart :) Regards, John >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0032_01C4E66C.32D71770 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Dave,=20 If you find the answers to those questions I sure would like to = know. Best=20 I can tell they are just made-up numbers to put a label on a particular=20 package. Kind of like stage 2 street porting.

Dave=20 Leonard

What I have yet to find = is a good=20 explanation of T03 Turbine "stages". The T03/hybrid turbo's listed for = sale=20 all have stage numbers (stage 1,2,3, etc) associated with them and I = haven't=20 quite figured out the difference (other than the overly = simplistic/vague=20 explanation that higher stages are for higher hp). Being a "why" kind = of guy,=20 I would like to be able to assimilate this = properly.

Watching,=20 Waiting, Ebaying..
Dave Staten

DaveLeonard wrote:

Great overlay John.

For some reason you plots seem to put = this more in=20 the surge region than with the data that I was using. I don't = know=20 what the difference is. Anyway, based on your initial = conditions=20 I decided that maybe going a little smaller (moving the overlay to = the=20 right) would be OK. And what do you know, I have been = following a=20 turbo on e-bay with a compressor between the v-trim and p-trim = (slightly=20 smaller) and I may just get it for $335. And it has a nice way = to=20 attach the exhaust - unlike that lame TO4 I bought from someone on = this list=20 that has no way to attach the exhaust(slip fit turbo's are = everywhere and=20 they suck - anyone want to buy one?) :)

Dave Leonard

That's better Dave

I don't know Excel all that well, but I tried to make a = few=20 additions.

I added a graph overlayed on the compressor map, then = generated=20 some plots by iterative data entry.

There must be a way to generate the source data and plot = it based=20 on a table of MAP and altitude.

This would help get closer to knowing what settings keeps = us on the=20 "island".

Does this make any sense, or am I off on a wild goose=20 chase?

Hmmm. A wild goose at 15000 ft while at 46 MAP and 6500 = rpm. I=20 wonder where that would go on the chart :)

Regards,

John
>>  Homepage:  http://www.flyrotary.com/

>>  Archive:   =
http://lancaironline.net/lists/flyrotary/List.html

------=_NextPart_000_0032_01C4E66C.32D71770--