Ford's answers to the NHTSA 6.7 Investigation

hawkeye-08 wrote:


Remember the Hubble space telescope? The big mirror was ground wrong (seems there was a mix up in the measurements, something about metric vs SAE). I wonder if some Ford engineer signed off on the fuel system requiring 460 scar fuel because US fuel is 520 scar, thinking that 520 is better than 460, with greater than 10% margin...

Actually, the flaw was in one instrument (null corrector) being wrong, and 2 other instruments (right) being ignored.

Kind of like being on forums like this where people like to ignore facts that are not in alignment with their opinion, no matter how well documented the facts are.

See:

Wiki Hubble Mirror Flaw wrote:

A commission headed by Lew Allen, director of the Jet Propulsion Laboratory, was established to determine how the error could have arisen. The Allen Commission found that the main null corrector, a device used to measure the exact shape of the mirror, had been incorrectly assembled—one lens was wrongly spaced by 1.3 mm. During the polishing of the mirror, Perkin-Elmer had analyzed its surface with two other null correctors, both of which correctly indicated that the mirror was suffering from spherical aberration. The company ignored these test results, as it believed that the two null correctors were less accurate than the primary device that was reporting that the mirror was perfectly figured