X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m26.mx.aol.com ([64.12.137.7] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTP id 2382677 for flyrotary@lancaironline.net; Fri, 12 Oct 2007 01:44:30 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.7; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m26.mx.aol.com (mail_out_v38_r9.3.) id q.bbf.1908782b (32914) for ; Fri, 12 Oct 2007 01:43:47 -0400 (EDT) From: WRJJRS@aol.com Message-ID: Date: Fri, 12 Oct 2007 01:43:47 EDT Subject: Re: [FlyRotary] Re: Hose clamp myth busters To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1192167827" X-Mailer: 9.0 SE for Windows sub 5042 X-Spam-Flag: NO -------------------------------1192167827 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 IApJbiBhIG1lc3NhZ2UgZGF0ZWQgMTAvMTEvMjAwNyAxMDoxMTo0OSBQTSBQYWNpZmljIFN0 YW5kYXJkIFRpbWUsICAKQUxWZW50dXJlc0Bjb3gubmV0IHdyaXRlczoKCk9uIG15IGNvb2xp bmcgIHN5c3RlbSBJIGhhdmUgcmVpbmZvcmNlZCBzaWxpY29uZSAgY29tcG91bmQgaG9zZXMg KGJsdWUgc3R1ZmYgCmZyb20gTWNNYXN0ZXItQ2FycikuICBNeSBzeXN0ZW0gaXMgc2V0IHVw IHdpdGggIGR1YWwgY2FwcyBpbiBzZXJpZXMgd2l0aCB0aGUgCnBvdGVudGlhbCBvZiAzOCBw c2kgbWF4IHByZXNzdXJlLiAgSSBwdXQgdGhlICBob3NlcyBvbiwgdGlnaHRlbmVkIHRoZW0g dG8gd2hhdCAKc2VlbWVkIHJpZ2h0LCB0aGVuIHByZXNzdXJpemVkIHRvIHN5c3RlbSB0byAg MzggcHNpLiAgQSBjb3VwbGUgb2YgdGhlIApjb25uZWN0aW9ucyBsZWFrZWQsIHNvIEkgZ290 IG15IMK84oCdIGRyaXZlIHJhdGNoZXQgIHdpdGggdGhlIGFwcHJvcHJpYXRlIHNvY2tldCwg YW5kIAp0aWdodGVuZWQgdGhlIGNsYW1wIHVudGlsIHRoZSBsZWFrICBzdG9wcGVkLiAgSeKA mW0gZ3Vlc3NpbmcgaXQgd2FzIGFib3V0IDMwIOKAkyAzNSAKaW5jaCBsYnMuICBJIGNoZWNr ZWQgIHRoZW0gYSBmZXcgd2Vla3MgbGF0ZXIgYW5kIGZvdW5kIEkgY291bGQgZ2l2ZSBtb3N0 IG9mIAp0aGVtIGFub3RoZXIgcGFydGlhbCAgdHVybiB0byBhYm91dCB0aGUgc2FtZSB0b3Jx dWUgIGxldmVsLiAgSGF2ZW7igJl0IHRvdWNoZWQgCnRoZW0gaW4gdGhlIHllYXIgb2YgZmx5 aW5nIHNpbmNlLCBhbmQgdGhlcmUgaGF2ZSAgYmVlbiBubyBsZWFrcywgYW5kIHRoZSBob3Nl cyAKc3RpbGwgbG9vayBhcyBnb29kIGFzIHdoZW4gdGhleSB3ZW50IG9uLiAgIEnigJlsbCBw cm9iYWJseSByZXBsYWNlIG1vc3Qgb2YgdGhlbSAKd2l0aGluIHRoZSBuZXh0IHllYXIgLSBq dXN0ICBiZWNhdXNlLiAKQWwKCgpBbCBhbmQgYWxsLApPbmUgb2YgdGhlIGJlc3Qgc3VnZ2Vz dGlvbnMgSSd2ZSBzZWVuIGNhbWUgZnJvbSBDYXJyb2wgU21pdGgncyBQcmVwYXJlIHRvICAK V2luIGJvb2suIEhlIHN1Z2dlc3RlZCB0aGF0IHlvdSBzaG91bGQgb25seSB1c2UgdGhlIHN0 YWlubGVzcyBjbGFtcHMgd2l0aCB0aGUgIApmdWxsIHRocm91Z2ggaG9sZXMgZm9yIHRoZSB3 b3JtLiAoaGFyZCB0byBnZXQgYW55dGhpbmcgZWxzZSB0aGVzZSBkYXlzKSBUaGUgIAp0aWdo dG5lc3MgaXMgYWJvdXQgcmlnaHQgb24gYSBydWJiZXIgaG9zZSB3aGVuIHRoZSBob3NlIGJp dHMgcG9raW5nIHRocm91Z2ggdGhlICAKd29ybSBkcml2ZSBzbG90cyBhcmUgZmx1c2ggb3Ig YWJvdmUgdGhlIGxldmVsIG9mIHRoZSBjbGFtcCBtYXRlcmlhbC4gT2YgCmNvdXJzdCAgeW91 IG11c3QgY2hlY2sgZm9yIGxlYWtzIGV0Yy4uIGFuZCBZTU1WLCBhbmQgYWxsIHRoZSB1c3Vh bCBkaXNjbGFpbWVycy4gVGhlIAp3b3JtICBvZmZlcnMgZW5vdWdoIG1lY2hhbmljYWwgYWR2 YW50YWdlIHRoYXQgdGhlIGFjdHVhbCB0b3JxdWUgcmVxaXJlbWVudCAKd291bGQgdmFyeSAg c28gbXVjaCB3aXRoIHZhcmlvdXMgbWF0ZXJpYWxzIGFzIHRvIGJlIGhhcmQgdG8gcHJlZGlj dC4gQSBzaWxpY29uZSAKY292ZXJlZCBob3NlICBtaWdodCBiZSBzbGlwcGVyeWVyIG9yIHN0 aWNraWVyIHRoYW4gYSBydWJiZXIgb25lLiBXaGVuIGl0IHN0b3BzIApsZWFraW5nIGl0IGlz ICB0aWdodCBlbm91Z2ghIApCaWxsIEplcHNvbgoKCgoqKioqKioqKioqKioqKioqKioqKioq KioqKioqKioqKioqKioqKiBTZWUgd2hhdCdzIG5ldyBhdCBodHRwOi8vd3d3LmFvbC5jb20K -------------------------------1192167827 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en
In a message dated 10/11/2007 10:11:49 PM Pacific Standard Time,=20 ALVentures@cox.net writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DVerdana color=3D#0000ff siz= e=3D2>

On my cooling= =20 system I have re<= SPAN=20 style=3D"FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">inforced silicone= =20 compound hoses (blue stuff from McMaster-Carr).  My system is set up=20= with=20 dual caps in series with the potential of 38 psi max pressure.  I put= the=20 hoses on, tightened them to what seemed right, then pressurized to system=20= to=20 38 psi.  A couple of the connections leaked, so I got my =C2=BC=E2= =80=9D drive ratchet=20 with the appropriate socket, and tightened the clamp until the leak=20 stopped.  I=E2=80=99m guessing it was about 30 =E2=80=93 35 inch lbs.=   I checked=20 them a few weeks later and found I could give most of them another partial= =20 turn to about the same torque=20 level.  Haven=E2=80=99t touched them in the year of flying since, and= there have=20 been no leaks, and the hoses still look as good as when they went on. = ;=20 I=E2=80=99ll probably replace most of them within the next year - just=20 because.

 

Al

Al and all,
One of the best suggestions I've seen came from Carrol Smith's Prepare=20= to=20 Win book. He suggested that you should only use the stainless clamps with th= e=20 full through holes for the worm. (hard to get anything else these days) The=20 tightness is about right on a rubber hose when the hose bits poking through=20= the=20 worm drive slots are flush or above the level of the clamp material. Of cour= st=20 you must check for leaks etc.. and YMMV, and all the usual disclaimers. The=20= worm=20 offers enough mechanical advantage that the actual torque reqirement would v= ary=20 so much with various materials as to be hard to predict. A silicone covered=20= hose=20 might be slipperyer or stickier than a rubber one. When it stops leaking it=20= is=20 tight enough!
Bill Jepson



See what'= s new at AOL.co= m and Make AOL Your Homepage.
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