Chicken Cannon Lovers

"Keith Willshaw" wrote:

:"Jim E" wrote in message
...
:
: Watched the program.
: Their conclusion, frozen or thawed makes no difference to impact.
: Strictly a function of mass, velocity, and time of deceleration.
:
:Hmmm, I suspect when dealing with a kg of water it makes a
:big difference to the fan blades if that water is frozen
:in a single lump.

Sounds to me like they left out a calculation of the energy of
deformation (which doesn't go into the windscreen, but rather into the
chicken). Frozen chicken deforms much less, so I would expect it to
actually have greater energy of impact when compared to the non-frozen
variety given the same initial impetus.

Sort of like the 'crush space' on a car with a long hood.

--
"Some people get lost in thought because it's such unfamiliar
territory."
--G. Behn

"Fred J. McCall" wrote in message
...
"Keith Willshaw" wrote:

:"Jim E" wrote in message
...
:
: Watched the program.
: Their conclusion, frozen or thawed makes no difference to impact.
: Strictly a function of mass, velocity, and time of deceleration.
:
:Hmmm, I suspect when dealing with a kg of water it makes a
:big difference to the fan blades if that water is frozen
:in a single lump.

Sounds to me like they left out a calculation of the energy of
deformation (which doesn't go into the windscreen, but rather into the
chicken). Frozen chicken deforms much less, so I would expect it to
actually have greater energy of impact when compared to the non-frozen
variety given the same initial impetus.

Sort of like the 'crush space' on a car with a long hood.

--



Their calculation based upon observed deflection of steel plate target upon
impact (high speed camera for time of deceleration)
Time of deflection of target was identicle in both cases.
Amount of deflection however was not measured.
This could be inducing error?

Side note: This proved an excelent method of deboning a chicken.

Jim E
"Some people get lost in thought because it's such unfamiliar
territory."
--G. Behn