X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-junco.atl.sa.earthlink.net ([209.86.89.63] verified) by logan.com (CommuniGate Pro SMTP 6.0.6) with ESMTP id 6433565 for lml@lancaironline.net; Mon, 19 Aug 2013 23:27:15 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.63; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=H5Gs5naN3okb1WB+oueKY1Fgm4tC6pbgT7j9wc9UuHgGiHcmM+/pRd9zSYtbJXle; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [72.73.82.26] (helo=[192.168.1.24]) by elasmtp-junco.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1VBcaZ-0001z6-Rt for lml@lancaironline.net; Mon, 19 Aug 2013 23:26:36 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-129--769964470 Subject: Re: [LML] Propeller for ES Date: Mon, 19 Aug 2013 23:26:33 -0400 In-Reply-To: To: "Lancair Mailing List" References: Message-Id: X-Mailer: Apple Mail (2.1085) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940b4cfeaaea7240288fdd1cab3bb2310b2350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 72.73.82.26 --Apple-Mail-129--769964470 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi Tom, As others have pointed out: - the Hartzell scimitar is considered fastest. - the Hartzell metal prop is heavier. If you need ballast near the = front of the plane, something to consider. I think that's an issue with = the IV's but if memory serves, not the ES's. - the Hartzell full feathering metal prop is heavier still. - a composite prop is smoother and lighter. If it weren't for CG considerations, I would go with a composite prop = and as Bob pointed out, the constant speed is nearly as good as full = feathering when it comes to glide. One thing you should make sure you understand is what your prop will do = if it loses oil pressure. A full feathering prop will go to coarse pitch. Most constant speed = props will go to fine pitch. Colyn On Aug 18, 2013, at 10:45 AM, Tom Wallace wrote: It is finally time to purchase the propeller for my ES. I have a IO 550N engine. I searched the archives and didn't see any thread addressing = this but if I missed it I apologize for the redundancy. I would appreciate any input on why the Hartzell or MT props for this combination was chosen or other available props that have been used. = Thanks in advance for your input. Tom N726TW =20 Blue Skies, Tom =20 --Apple-Mail-129--769964470 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Hi Tom,

As others have pointed = out:
- the Hartzell scimitar is considered = fastest.
- the Hartzell metal prop is heavier.  If you = need ballast near the front of the plane, something to consider.  I = think that's an issue with the IV's but if memory serves, not the = ES's.
- the Hartzell full feathering metal prop is heavier = still.
- a composite prop is smoother and = lighter.

If it weren't for CG considerations, I = would go with a composite prop and as Bob pointed out, the constant = speed is nearly as good as full feathering when it comes to = glide.
One thing you should make sure you understand is what = your prop will do if it loses oil pressure.
A full feathering = prop will go to coarse pitch.   Most constant speed props will go = to fine = pitch.

Colyn


On Aug 18, 2013, at 10:45 AM, Tom Wallace wrote:

It is finally time to purchase = the propeller for my ES. I have a IO 550N
engine. I searched the = archives and didn't see any thread addressing this but if
I missed it = I apologize for the redundancy.
I would appreciate any input on why = the Hartzell or MT props for this
combination was chosen or other = available props that have been used. Thanks in
advance for your = input.

Tom
N726TW
 
Blue = Skies,
Tom