Inside the small world of military aviation, his exploits as a test pilot are still spoken of with awe.
His skill as a research and test pilot certainly impressed Buzz Aldrin.
The quiet routine of a test pilot had prepared him for nothing like this.
Last Fridays job was to have been Jimmys last as a test pilot.
They wanted a perfect superman to test pilot their baby, even if they knew they'd eventually have to take second best.
If something goes wrong because the test pilot is disturbed or nervous, the company will be bankrupt.