Return-Path: Received: from fed1rmmtao06.cox.net ([68.230.241.33] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 573789 for flyrotary@lancaironline.net; Mon, 20 Dec 2004 02:00:40 -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 <20041220070007.VDUC17071.fed1rmmtao06.cox.net@davidandanne> for ; Mon, 20 Dec 2004 02:00:07 -0500 From: "DaveLeonard" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Turbo Calculator Date: Sun, 19 Dec 2004 23:00:22 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0052_01C4E61E.84A28FB0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0052_01C4E61E.84A28FB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit 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 ------=_NextPart_000_0052_01C4E61E.84A28FB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Great=20 overlay John.

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

Dave=20 Leonard

That's better Dave

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

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

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

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

Does=20 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=20 where that would go on the chart :)

Regards,

John

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