At the beginning of the 50’s USAF engaged in various test programs to know the effects of weightlessness on man’s physical and mental performance. An easy way to gather Zero-G data were the parabolic flights: property executed vertical parabola that produced some seconds of weightlessness and sub-gravity. After using T-33’s and F-89’s, their standard asset for zero-G research became the F-94C, which offered a longer parabola due to its better performance and power.
To contrast the human data acquired a comparative study with animals were undertaken.It seems they removed the cat’s vestibular organs… awful science.
In any case, it’s an alluring pic.