Originally Posted by gotchiguy
Must say that I'm guna disagree with you. In trouble in the dark surely black tubes would be an advantage? Now that rescue teams (and Martini
) have moved from good old rods and cones to FLIR technology etc surely the greater heat signature that the black material will have will be beneficial, since it will show up stronger on the display. The lower radiation output of the red material would quickly become the same temperature as the sea I would have thought.
Me thinks your grasp of GCSE physics has over looked some important issues:
(1) Its unlikely that when you are in real distress at night your tubes are the hottest part of your rib. That is probably you, or your nav lights (unless the engine is still running or you have a fire!). If life threatening distress its probably not been that hot anyway - and certainly not by night.
(2) black emits better so might
give a stronger signature on FLIR, but consequently cools down quicker (that energy has to come from somewhere) so lasts less time than a less emitting colour.
(3) if its really gone Pete Tong then you'll be "gel coat up" or you are totally swamped and taking waves over the top and your tubes are pretty much at sea temp.
EDIT - Chewy put it more succinctly than me!