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  1. timbeau

    Charging multiple low voltage batteries (via high tension?)

    I would like to find out how to charge large numbers of low voltage batteries simultaneously ASAP without overloading any individual battery cell. If I had, say, 160 AA 1.5v batteries using a 240V AC supply how would this be done without burning out individual batteries (my mind says 'series'...
  2. timbeau

    Why are jet aircraft so noisy? A resolution?

    Firstly, many thanks to all who have contributed and assisting me in correcting misconceptions and righting wrongs! I would like to say, however, that I still question if turboprops are as loud as heard from the ground - and yes I am talking about climbout from approx 25 minutes drive from the...
  3. timbeau

    Why are jet aircraft so noisy? A resolution?

    Forgive me for such a basic question. I live under an intermittent flight path. While I accept this as a natural consequence of where I live (West London, which has many other advantages!) I am amazed at the sheer volume of noise that civil airliners produce. The aircraft in question appear to...
  4. timbeau

    Temperature difference between evap & cond

    Thanks Latexman. I am looking to find out the extremes possible in a compressor driven condensor-evap mechanism and am guessing that the medium/gas used would be a factor. I have heard of 'cryocoolers' and I am guessing they may also produce alot of heat, so do these produce wider temperature...
  5. timbeau

    Temperature difference between evap & cond

    Hi, I would like to know the typical temperature differences between the medium in the chiller part of an air conditioner and the hot part (that sits outside). To lose heat in hot countries I am guessing that it has to be pretty hot, and to chill hot air the cold part must be pretty cold...

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