[Diy_efi] Hydrogen

[Bill Washington]

Gents,
    Some years ago I saw film of a demonstration comparing the safety of 
cylinders of liquified Hydrogen vs LPG.
the cylinders (of similar volume) were setout on a weapons range and an 
incendiary projectile was fired into each one to simulate a fracture 
resulting from a vehicle collision.

The result:
The Hydrogen vented in a rising jet of (invisible) flame - yes hot but 
not instantly catastrophic - anyone close by would have had a chance to 
escape.

The LPG cylinder exploded instantly in a very large explosion which 
would have obiterated anything/everything in a 20-30 yard radius and 
severly damaged anything over a considerably larger area.

The conclusion presented was that the hydrogen was much safer, however 
we have many LPG cars on the road and very few hydrogen .......

Yes 'manufacturing' and storage are an issue - the Huge pressures 
involved not the least of them .....

I don't know, however that demonstration keeps coming to mind in view of 
the comments and opinions that have been shared recently ....... I would 
like to hear from someone with expertise and experience in the gas industry.

Regards
Bill