Recent content by AJacq

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    How Can I Increase My Lawn Sprinkler System's Flow Rate?

    Thanks JBA... I appreciate your offer of help... I believe that I will take measurements and photos (because 1000 of my non-technically savvy words don't come close to a picture) FYI... the "flow-tester" I used was a 5 gallon bucket in which I put exactly 10 x 1 litre of water with a 1000 ml...
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    How Can I Increase My Lawn Sprinkler System's Flow Rate?

    Hi JBA... no I have not... I'll look into it tomorrow and get back to you... I'm guessing it will be indicated on the flow regulator itself or I will get a model number and look it up online. My guess is that it should be ok, as I have stated the regulator is for a whole building and I have...
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    How Can I Increase My Lawn Sprinkler System's Flow Rate?

    Thank you for taking the time to explain in depth... it's much appreciated !
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    How Can I Increase My Lawn Sprinkler System's Flow Rate?

    Thanks for the additional information... and you are correct that I do calcs for personal enjoyment and I always learn something new in the process. I goofed on the pressure (all these different units... when is the whole world going to switch to SI units and be done with it)... the required...
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    How Can I Increase My Lawn Sprinkler System's Flow Rate?

    Thanks... Here is what I got (hope the math is correct) Assuming type M copper pipes : Nominal size 1/2 in. ; ID = 0.569 in. ; Area = 0.254 sq. in. @ 1565 L/h Nominal size 3/4 in. ; ID = 0.811 in. ; Area = 0.516 sq. in. ; Expected flow rate = 3179 L/h Nominal size 1 in. ; ID = 1.055 in. ...
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    YOU: Fix the US Energy Crisis

    ... but is there truly such a thing as a geographical circumscribed crisis when dealing with energy ?... isn't a US problem a global problem and vice-versa ?
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    YOU: Fix the US Energy Crisis

    BP statistical review... as in British Petroleum ? If these numbers are correct... not a good sign IMO
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    YOU: Fix the US Energy Crisis

    Considering the growing demand for international travel and human behaviour, I'm not sure people having to fly across the world would be willing to make 10-15 stops to refuel... I don't see where the "overkill" is... perhaps you could elaborate. I'm not sure how "affordability, lower noise...
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    YOU: Fix the US Energy Crisis

    Ok... I misunderstood your meaning in your original post... I agree
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    YOU: Fix the US Energy Crisis

    Gave the article a quick read (will read more attentively when I can focus on it)... It's very interesting and 2 paragraphs caught my attention : " For application in aircraft the most important parameters are the energy per mass E* and to a lesser extent the energy per volume V* . These...
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    YOU: Fix the US Energy Crisis

    I'm curious as to which human behaviour and what history you are referring to ? If we are referring to changes that suited human behaviour, than yes, history has shown time and again that humans embraced them readily... but when changes go against human behaviour, than change can be very...
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    YOU: Fix the US Energy Crisis

    I though the objective was to determine a viable alternative to fossil fuel energy : e.g. if we knew for sure that there would be no more fossil fuels in 100 years , what would we do today and in the next hundred years to have an alternative to fossil fuels. What you are suggesting has more to...
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    YOU: Fix the US Energy Crisis

    Looked it up... NASA has a small study project on such an airplane... "The drawback with electric propulsion is energy storage—dramatic improvements in battery energy density are essential before they can be used in large aircraft" We are back to energy density and specific energy...
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    YOU: Fix the US Energy Crisis

    I may be wrong but I believe JP-7 fuel is 43.5 MJ/kg The ammonia article is very interesting... will read up more on it... thanks ! The airship is making a come back... but no more of those hydrogen filled balloon-bombs though o0)
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    YOU: Fix the US Energy Crisis

    Just to be clear, I was not suggesting that a contiguous 48000 square mile solar farm be constructed... I was simply illustrating the size and scope of the solar energy requirements to replace gasoline... I used Arizona because of the abundant days of sunshine. Unless I'm mistaken, I don't...
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