X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 15 Nov 2008 10:06:56 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d06.mx.aol.com ([205.188.157.38] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3301442 for lml@lancaironline.net; Sat, 15 Nov 2008 07:52:22 -0500 Received: from Sky2high@aol.com by imo-d06.mx.aol.com (mail_out_v39.1.) id q.d5f.3af4651d (48552) for ; Sat, 15 Nov 2008 07:52:16 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Sat, 15 Nov 2008 07:52:45 EST Subject: Re: [LML] Prop Length for 360 X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1226753565" X-Mailer: AOL 9.1 sub 5000 X-Spam-Flag:NO -------------------------------1226753565 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Matt, Interesting. Can you give us the hub and blade designation - perhaps it is the setup that 320's use. That is: hub HC-F2YL-1F with blades F8468D-14 (84" less 14" = 70"). I have gone thru, uh, several blades and it was some years ago that the 320 set-up went from "normal" to "experimental". Oh well. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Pilot not TSO'd, Certificated score only > 70%. In a message dated 11/15/2008 6:36:51 A.M. Central Standard Time, mmcmanus@grandecom.net writes: I'm in the middle of getting my Hartzell 2 blade prop overhauled for my Lancair 360. I got a new hub at 50% discount from Hartzell to eliminate the recurring eddy current inspection. The prop shop doing the overhaul has issues with the blades and they will not issue the formal 8131 (I think) paperwork for the overhaul. The problem is the blade length. I bought the airplane 3 years ago and it had an overhauled "0" time prop when the airplane was built in 2002. The blades are 70" long according to the prop shop. They also say that the Hartzell recommends a 72" blade. But Hartzell also allows a 68" blade for the Lyc 360. They do not however, recommend a 70" blade. The question is, since I've had no problems or vibration issues with my 70" blades - should I be concerned? I guess Hartzell's recommendation is based on some harmonic resonance or some other vibration related things (which are outside my knowledge). Does my 70" blade length provide cruise or climb capabilities that are greater or lesser than a 68" prop. I'm planning to have the 70" blades reinstalled on the new hub, and the log entry will just say the standard overhaul stuff (except the IAW stuff), and it will specify "experimental A/C usage only." Any thoughts? Thanks, Matt McManus lnc2 360 408 hours total time airplane. -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html **************Get the Moviefone Toolbar. Showtimes, theaters, movie news & more!(http://pr.atwola.com/promoclk/100000075x1212774565x1200812037/aol?redir=htt p://toolbar.aol.com/moviefone/download.html?ncid=emlcntusdown00000001) -------------------------------1226753565 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Matt,

Interesting. Can you give us the hub and blade designation - perh= aps=20 it is the setup that 320's use. That is: hub HC-F2YL-1F with blades F8468D-1= 4=20 (84" less 14" =3D 70"). I have gone thru, uh, several blades and it wa= s some=20 years ago that the 320 set-up went from "normal" to "experimental". Oh= =20 well.

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

Pil= ot=20 not TSO'd, Certificated score only > 70%.

In a message dated 11/15/2008 6:36:51 A.M. Central Standard Time,=20 mmcmanus@grandecom.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>I'm in=20 the middle of getting my Hartzell 2 blade prop overhauled for my=20 Lancair
360. I got a new hub at 50% discount from Hartzell to=20 eliminate the recurring
eddy current inspection. The prop shop doing th= e=20 overhaul has issues with the
blades and they will not issue the formal=20= 8131=20 (I think) paperwork for the
overhaul. The problem is the blade=20 length.

I bought the airplane 3 years ago and it had an overhauled=20= "0"=20 time prop when
the airplane was built in 2002. The blades are 70" long=20 according to the prop
shop. They also say that the Hartzell=20 recommends a 72" blade. But Hartzell
also allows a 68" blade for the Ly= c=20 360. They do not however, recommend a 70"
blade.

The quest= ion=20 is, since I've had no problems or vibration issues with my 70"
blades -= =20 should I be concerned? I guess Hartzell's recommendation is based on
so= me=20 harmonic resonance or some other vibration related things (which=20 are
outside my knowledge). Does my 70" blade length provide cruis= e or=20 climb
capabilities that are greater or lesser than a 68" prop.

I= 'm=20 planning to have the 70" blades reinstalled on the new hub, and the=20 log
entry will just say the standard overhaul stuff (except the IAW stu= ff),=20 and it
will specify "experimental A/C usage only."

Any=20 thoughts?

Thanks,
Matt McManus
lnc2 360
408 hours total ti= me=20 airplane.

--
For archives and unsub=20 http://mail.lancaironline.net:81/lists/lml/List.html

Get the Moviefone Toolbar. Showtimes, theaters, movie news=20= & more!

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