Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Sat, 15 Jan 2005 07:16:58 -0500 Message-ID: X-Original-Return-Path: Received: from pfepb.post.tele.dk ([195.41.46.236] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 608027 for lml@lancaironline.net; Sat, 15 Jan 2005 05:16:02 -0500 Received-SPF: none receiver=logan.com; client-ip=195.41.46.236; envelope-from=yacht-pool@forsikring.dk Received: from [127.0.0.1] (unknown [194.192.150.22]) by pfepb.post.tele.dk (Postfix) with ESMTP id 7C5EE5EE01D for ; Sat, 15 Jan 2005 11:15:20 +0100 (CET) X-Original-Message-ID: <41E8ED30.7010005@forsikring.dk> X-Original-Date: Sat, 15 Jan 2005 11:15:12 +0100 From: Yacht-Pool User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: da,en MIME-Version: 1.0 X-Original-To: Lancair Mailing List Subject: Re: [LML] Propeller for L 235/320 References: In-Reply-To: Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit

"He has the possibility to get a Hartzell propeller,type HC-C2YL-1BF,coming from a Lyc. O320-D1F and asks if this propeller can be cut to 70"

The term "HC-C2YL-1BF" only describes the hub, it tells nothing about the blades, so it is not possible to answer your question with the data provided.
This is a compact hub and would probably require a 4" prop extension. Your buddy probably uses a prop extension already, and while this is perfectly acceptable with a fixed pitch wood prop or even a lightweight C/S prop, it is hardly going to do a heavy weight Hartzell prop any good.
The recommended prop for a 320 is the extended hub HC-F2YL-1F/F8468D-14, F8468D-14 being the blade designation. This hub is 4" longer than the HC-C2YL-1BF, the extension is simply built into the hub.

More info at: http://www.hartzellprop.com/kitplane/index_kitplane.htm

What your buddy needs to do is:

1. Measure the hub to verify that it will actually fit his particular installation ( I don´t think it will)
2. Find out what kind of blades are in the hub
3. Check with Hartzell or Lancair if these blades are approved for a 235/320 and can safely be cut down to 70"
4. Be wise enough not to take advice from "experienced pilots", "clever guys" auto mechanics or other smart%sses

Regarding props, cranks and a few other items, it is best to let the manufacturers do the experimenting!

Very best regards
Tim Jorgensen, Denmark
360FB 1992 - 2005, 55% done (good enough Scott?)