Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: Rich <rich@example.invalid>
Newsgroups: comp.os.linux.misc
Subject: Re: FAA To Finally Ditch Floppy Disks & Win-95
Date: Tue, 17 Jun 2025 03:42:15 -0000 (UTC)
Organization: A noiseless patient Spider
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c186282 <c186282@nnada.net> wrote:
> On 6/15/25 11:00 PM, Rich wrote:
>> A little digging indicates that nylon's 'brittleness' temperature is 
>> somewhere in the -50C to -60C zone.  So the typical temperature of 
>> the environment is right in the "brittle zone" for nylon.  Then one 
>> has to factor in the impact of vibration (which might cause a not 
>> yet fully brittle nylon tie to shatter at -40C instead of -55C) and 
>> I think we can see why nylon ties might not be aircraft rated.
> 
>   Borderline ...  but perhaps relevant.  Maybe not SO much for 
>   commercial craft, but decidedly for military and space apps.
> 
>   Other sources say that polyester cord has become the modern 
>   standard.  I've seen some info that says many polyesters are good 
>   to about -100c.  Good for aircraft, good for antarctic gear.

A -100C brittleness level leaves plenty of safety margin for operation 
in -50C to -60C without worrying that your tie material is just on the 
edge of failure from cold induced brittleness.  With Nylon having it's 
magic brittle temperature right in the normal temperature range at 
usual commercial altitudes, there is no safety margin at all.