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Message-ID: <004e01c80a48$b902f140$81571fd3@george>
From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2376461@logan.com>
Subject: Re: [FlyRotary] Re: Hose clamp myth busters
Date: Tue, 9 Oct 2007 17:48:01 +1000
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> George Lendich wrote:
>>
>> Ernest,
>> I agree with your statement we tend to overengineer everything, I believe 
>> through ignorance and I don't think that's too critical of myself and 
>> others, but before we challenge those more experienced, I think some 
>> experimentation should be involved.
>> It's your idea, so what about testing these spring clams to pressure (and 
>> over) and over extended time to see what the outcomes really are!?
>> George ( down under)
> GOOD point, George.  Nothing like real data vs theoretical posturing.
>
> It just so happens that I've been running just such a test for a little 
> over 7 years now.  Literally thousands of heat cycles later, and they're 
> still going strong.  I've run them for extended periods in the coldest and 
> hottest weather that North Carolina has to offer.  I've even pulled them 
> off and reused them when one of Dodge's crappy heater cores cracked on me. 
> I've got some assistants running tests for me up in Canada so that they 
> can be exposed to colder weather, and a few in Texas and Arizona so that 
> they can see some real heat.  So far, they just keep going like the 
> Energizer Bunny.
>
> Lynn and many others have forgotten more than I'll ever know, but there's 
> real world experience staring me in the face here.  I  don't see anything 
> that indicates the springs aren't up to the task, and lots of evidence 
> that they are.

Ernest,
That's very interesting, one thing I would like to see is a comparison on 
clamp pressures and clamping area.
George (down under)