1. #1
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    Default Pump cheat sheet

    I know that there was a similar post a while back, I couldn't find it. Anyway, I said that I would post the card that we made up. It works for us. Feel free to modify it for your needs if you like it. Suggestions are also welcome. This contains two double sided cards when they are put together.
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    Jason Brooks
    IAFF Local 2388
    IACOJ

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    Just reading it over quickly and have a question:
    1 hose friction loss:
    FL=Q2/5
    Q=gpm flowing, drop last digit
    Friction loss constants (per 100 feet):
    1 hose (125 gpm) 30 psi
    I don't the equation above matches the rule of thumb later on the sheet.
    So you call this your free country
    Tell me why it costs so much to live
    -3dd

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    I don't understand the question. These cards were made for our guys to use when the brain fart on scene. What is the question?
    Jason Brooks
    IAFF Local 2388
    IACOJ

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    Quote Originally Posted by voyager9 View Post
    Just reading it over quickly and have a question:




    I don't the equation above matches the rule of thumb later on the sheet.
    Friction loss per 100 feet


    FL=Q2/5 (drop last digit of gpm, so 125 gpm will be 12)

    FL=(12x12)/5

    FL= 28.8 rounded up to 30 for rule of thumb

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    Quote Originally Posted by SWLAFireDawg View Post
    Friction loss per 100 feet


    FL=Q2/5 (drop last digit of gpm, so 125 gpm will be 12)

    FL=(12x12)/5

    FL= 28.8 rounded up to 30 for rule of thumb
    OHhhhh... I read it wrong. I read it as Q x (2/5) instead of Q^2 / 5.
    So you call this your free country
    Tell me why it costs so much to live
    -3dd

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    I knew I had this somewhere on my computer..........the two columns are the same. When I print out the sheet, I cut it in half, fold it over and laminate it. One goes in my shirt pocket, the other in my helmet. These are based on my departments hydraulic charts.

    Stay Safe
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