need a conversion

[sdelanty at sonic.net]

>     Can soemone please email me the conversion for air mass flow of x 
>     grams per sec to volume flow of y cubic feet per minute? Thanks in 
>     advance.


 Hugh Macinnes's book "turbochargers" gives the formula
  CFM * 0.069 = Lb/min

  This is corrected for an air temp of 85F and 28.4 in.Hg pressure.
   (density changes with temp and pressure)

  There's 453.6 grams per pound and 60 secs in a minute, so:

  1 cfm * .069 * 453.6 = 31.298 grams/minute 
  divide by 60 = 0.5216 grams/sec.

  so 1 CFM = 0.512 grams/sec
  or 1 gram/sec = 1.917 CFM   (at 85F and 28.4 in.Hg....)

  Err, hope that's right...

   Happy motoring,
   

 Steve Delanty  <sdelanty at sonic.net>

  1971 F100 shortbox, FE390, T-18 4-speed