X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Sender: To: lml Date: Fri, 22 Dec 2006 23:22:21 -0500 Message-ID: X-Original-Return-Path: Received: from imo-m25.mx.aol.com ([64.12.137.6] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1703090 for lml@lancaironline.net; Fri, 22 Dec 2006 22:23:22 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.6; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m25.mx.aol.com (mail_out_v38_r7.6.) id q.d25.3452f12 (41812) for ; Fri, 22 Dec 2006 22:22:31 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Fri, 22 Dec 2006 22:22:29 EST Subject: Re: [LML] Charging the Nose Strut X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1166844149" X-Mailer: 9.0 Security Edition for Windows sub 5358 X-Spam-Flag: NO -------------------------------1166844149 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 12/22/2006 8:20:45 P.M. Central Standard Time, jffisher@gmail.com writes: I have just fitted the engine to my 360 for the first time. Very exciting, except that, when I lowered the engine hoist, the nose strut went straight to the bottom of its travel. The strut was serviced with the latest mods, so it should be serviceable. I know that I am meant to charge it with dry nitrogen, but I don't have any and it is Christmas. My questions are: 1. Would I harm the strut if I charge it one time with air, then replace it with nitrogen later? 2. Alternatively, will I harm it if I leave it bottomed out for a week? 3. Where do you get nitrogen? I am building in my garage so do not have the usual airfield facilities. I do have a gas control unit with the right gauges and valves, which a friend gave me and which should be suitable, but no gas bottle, and nowhere obvious to go and get one. Jerry, If your strut was serviced it should have held the charge of both fork fluid and nitrogen. You should make sure that it contains the correct amount of fluid. Air, while 80% nitrogen, has the detrimental capacity to hold moisture which can cause deterioration of the strut interior. If you have an engine hoist supporting the engine and airframe (or put weight on the tail), you should be able to remove the strut and take it to a place where it could be filled - like an airport with a repair shop or your local EAA chapter. I think 250 psi should be adequate and you can always fine tune the strut by carefully releasing some nitrogen when it is back in place on the engine mount. Also, a local welding supplier may be able to sell you a bottle - someone like BOC Gases. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) A man has got to know his limitations. -------------------------------1166844149 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 12/22/2006 8:20:45 P.M. Central Standard Time,=20 jffisher@gmail.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

I have just fitted the engine to my 360 for the first time. Ver= y=20 exciting, except that, when I lowered the engine hoist, the nose strut wen= t=20 straight to the bottom of its travel. The strut was serviced with th= e=20 latest mods, so it should be serviceable. I know that I am meant to=20 charge it with dry nitrogen, but I don't have any and it is Christmas.&nbs= p;=20 My questions are:

1. Would I harm the strut if I charge it one time with air, the= n=20 replace it with nitrogen later?

2. Alternatively, will I harm it if I leave it bottomed out for= a=20 week?

3. Where do you get nitrogen? I am building in my garage=20= so=20 do not have the usual airfield facilities. I do have a gas control u= nit=20 with the right gauges and valves, which a friend gave me and which should=20= be=20 suitable, but no gas bottle, and nowhere obvious to go and get one.=20

Jerry,

If your strut was serviced it should have held the charge of both fork=20 fluid and nitrogen. You should make sure that it contains the cor= rect=20 amount of fluid. Air, while 80% nitrogen, has the detrimental capacity= to=20 hold moisture which can cause deterioration of the strut interior. If=20= you=20 have an engine hoist supporting the engine and airframe (or put weight on th= e=20 tail), you should be able to remove the strut and take it to a place where i= t=20 could be filled - like an airport with a repair shop or your local EAA=20 chapter. I think 250 psi should be adequate and you can alw= ays=20 fine tune the strut by carefully releasing some nitrogen when it is bac= k in=20 place on the engine mount. Also, a local welding supplier may be able=20 to sell you a bottle - someone like BOC Gases.

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

A m= an=20 has got to know his limitations.

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