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Old 25th July 2007, 04:07   #1
Monkey
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convert LPM to cubic feet per minute

what is the formula for converting an RMV in lpm to cu ft.?

so what would 1.25 lpm equate to?


thanks


BAM

and how do you convert a 3L tank to cubic feet?
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Old 25th July 2007, 04:29   #2
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Re: convert LPM to cubic feet per minute

For cylinder size conversions, I refer you to this thread my friend:

http://www.rebreatherworld.com/showthread.php?t=2851

The same conversion can be used for RMV, e.g.

Convert cf into free liters using: cf * 28.3 = free liters

so 1.25lpm = .044 cuft/minute

You can also download the trial version of V Planner and have a play in metric and imperial modes.

V-Planner VPM & VPM-B dive decompression software
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Old 25th July 2007, 05:00   #3
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Re: convert LPM to cubic feet per minute

or better yet do everything in liters, liters per minute, bar, and meters and live a happy life.

I took a trimix course last weekend and my instructor was figuring his preasure needed in his al 80s without bothering to use the water capacity and using 80 cu ft even after I mentioned that they are really 77 cu ft tanks. His answer? "I figured my RMV using 80 cu ft as the tank volume so now I use it to calculate the psi needed for the dive." Maddness.
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Old 25th July 2007, 05:12   #4
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Re: convert LPM to cubic feet per minute

Quote: (Originally Posted by cramerdn) View Original Post
or better yet do everything in liters, liters per minute, bar, and meters and live a happy life.

I took a trimix course last weekend and my instructor was figuring his preasure needed in his al 80s without bothering to use the water capacity and using 80 cu ft even after I mentioned that they are really 77 cu ft tanks. His answer? "I figured my RMV using 80 cu ft as the tank volume so now I use it to calculate the psi needed for the dive." Maddness.

after looking at the metric formulas.... imperial sucks... us americans do things the hard way don't we?


thanks for your help
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Old 25th July 2007, 06:18   #5
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Re: convert LPM to cubic feet per minute

I was 4 hours into my first tech diving course when I saw the light.
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