A computer program originally designed to test glider performance was adapted and used to study the flight behaviour of Pteranodon. A drag polar was determined for the membranous wing, giving a cambered plate profile. Results of the program described the straight flight performance, the turning ability and circling within thermals. Pteranodon was found to have a very low sinking speed, a similar lift/drag ratio to gliding birds, to be capable of staying aloft at extremely low speeds and a very small turning circle. The stress involved while turning was calculated and found to be low. It is suggested that a change from settled light-wind weather to more turbulent conditions could have brought about the extinction of this highly specialized animal.
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Cherrie D. Bramwell (1971) studied this question.
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