[Diy_efi] Re: diy_efi Digest, Vol 10, Issue 18

[Bill Washington]

Gentlepeople,
    A couple of comments on hydrogen:
1. Hydrogen is a safe fuel - I have seen a test where a large 
pressurised cylinder of hydrogen was shot with a high velocity incendary 
projectile (bullet) - result: a small hole jetting hydrogen which had 
ignited and burned in a single verticle flame until the cylinder was 
exhausted.
    Same test on cylinders of LNG and LPG result: instantaneous very 
large, very violent explosion.
    The Scientific reason: Hydrogen being lighter than air dissapates 
upwards very quickly without forming a large cloud of an explosive 
air/fuel mixture.
       LNG and LPG on the other hand are heavier than air and very 
quickly form an explosive air/fuel mixture - an un-ignited leak will 
'puddle' on the ground just waiting for a spark! - VERY dangerous!

    2. Someone mentioned the Hindenderg - leaking hydrogen was NOT its 
downfall! - I have seen a recent rigouous scientific investigation into 
the cause of that disaster - It's fabric covering ignited  - observe the 
film footage, the airship stayed horizontal and stable until about half 
the airship was in flames - some of the original fabric covering was 
found intact at the crash site - yes even after all this time - and was 
analysed - it was doped and coated with powdered aluminium and other 
chemicals to be heat reflective, unfortunately the formula used bore a 
remarkable similarity to the solid fuel used in the space shuttle's 
solid rocket boosters!!!!! - one very large bomb!!! - From the original 
designs the large fabric sections were not well earthed to the frame - 
The air was highly charged at the time of Himdenberg's arrival - stormy 
- and static discharges were observed.
    A small  static discharge was applied to a section to the recovered 
fabric and it immediatly ignited spectacularly and violently.
The evidence shows the the airship was well alight before any of the 
hydroden bags ruptured - the airship was doomed and the same disaster 
would have ensued if it was filled with helium! - Also the Zepplin 
company 'mysteriuosly' discontinued use of this type of fabric covering 
immediately, though the reasons were sealed and certainly not 
publicised! - their reputation was shot anyway, but the real reasons and 
their culpability was suppressed!

Regards
Bill

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