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Recent content by jimbobNTL

  1. J

    IFR air raise calcs

    The weight of the IFR is 15,7500 lbs The surface are is 9503.32 ft2 (109' diameter) estimated leakage is 271920 ft3/hr I'm coming up with 3.19 in WC
  2. J

    IFR air raise calcs

    My original weights were substantially off. I miss interpreted the values provided on the print. The numbers all make sense now and i need 3.12 mm h20. I appreciate all the replies and help.
  3. J

    IFR air raise calcs

    I did the calculations on a IFR we are planning to air raise in a couple months. Its 110' diameter with a combined weight of 250.59t. I came up with 302 mm h20. can someone verify my numbers are correct? Also, I'm trying to source fans for the project. i cant seems to find ones that meet the...
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