Q: I am wondering what is the accuracy of the statement about the stunt "With a 39.9 mph take-off speed, the weight of the Hornet being exactly 1460.6 kg (including passengers), and the distance between the klong ramps being exactly 15.86m apart, Bond perfectly executes the jump."
A: The Spiral Jump Stunt was perfromed in the James Bond movie Man with the Golden Gun. The implied speed and weight were essentially correct, but the implied precision is excessive and somewhat unrealistic. For the actual ‘traveling stunt’ the target speeds, etc were 40 +/- 1MPH and 1461 +/- 3 kg, and 13.85 +/- 0.03 m
A thrill show toured with the stunt both before and after James Bond picked it up for the movie. For many of the tour shows in the US, the drivers came in slow (below the low speed) and damaged the suspension and landing ramp on landing.
For the stunt shown in the movie and for many times after the bond movie, Bumps Willard, who did the stunt for the movie, toured Europe and hit the jump correctly every time!
The Spiral Jump patent
Additional information on The Spiral Jump Stunt and the HVOSM software used to create it
