Oakey said:
Of course with more humidity the air is more dense, which as a factor on the sustained velocity on the BB, also temperature as a factor as well.
True, higher humidity will have a greater per cubic denisty than lesser humid air.
Oakey said:
Warm air is more dense, meaning the sustained velocity is also reduced, so in theory, you should gain longer shots with temperatures below, about 68 degrees, and below 60% humidity.
Incorrect. Warm air is less dense than colder air. The less dense the air becomes (warmer) the less lift is provided.
According to Bernelli's theory, the hop-up creates a back spin that provides lift to the BB. There for, warm air will provide less lift on the BB than colder air. As a result a BB in warm air will need to travel faster to create the same amount of lifting force than in cold air. (vY)
However, the opposite effect on a BB is occur in colder air. Since colder air is more dense, the airspeed of a BB will be less. (vX)Resulting in a slower FPS, or requiring a strong spring to maintain the same FPS as compaired in warmer temps.
In short.
Colder temps will provide more lift, a shorter distance at a slower speed. (vX)
Warmer temps will provide less lift, further distance and faster speeds. (vY)
If a hop up is fixed into position on a 70 degree day to travel straight for x yards, and then shot again on a colder temp day (such as 35degrees) the BB will 'over hop' due to the backspin of the BB generating more lift.
Btw, The best temps for the longest shot will occur at median air temperature of 55 degress.