What's the end?

[bosshog]

5.55ATA*.65(the combined fractions of the N2 and O2)=3.6ATA of narcotic gases=86' END

I assume O2 to be narcotic and do the calculation as above.

Thats what I am looking for...Only how did you get 86' from 3.6 ATA of narcotic gasses. I am sure it will be obvious after you tell me, but I am not seeing it.

 

[rongoodman]

(3.6-1)*33'

 

[bosshog]

(3.6-1)*33'

Thank-you.