marine air wrote:
One of my flight instructors was a C.O. of a C-133 squadron and he said they were a really horrible aircraft. On paper they look great, fast, roomy cockpit, huge load carrying capability for it's day and modern looking even today. Largest aircraft in the U.S inventory for a few years.
He said the problem was that the C-133 apparently had some type of super high frequency vibration that wreaked havoc on the aircraft's systems. The pilot's thought it was a problem with those 18' diameter three bladed props as the tips were travelling at supersonic speeds even at cruise. Engineering denied it was the props, and stonewalled any corrective ideas put forward. Then airplanes started falling out of the sky. Many of the missions involved flying out of Travis AFB in California to the Korean peninsula with a load of Atlas missiles. C-133's were disappearing without any good reasons. He said that propellors would fail without notice and on one flight while cruising across the Atlantic he had the number one and two propellors slam into flat pitch and the aircraft was slammed sideways. Then, just as mysteriously they corrected and they were able to make it to Japan. Sometimes in the cockpit the insulation on the wiring would just fall off the wires and often ,after having systems failures inflight, a post flight inspection would reveal electrical wiring had snapped inside the cargo area inline with the number 2 and 3 propellor arcs. Once he made an emergency landing , I think it was Cape Canaveral with complete hydraulic failure; no flaps, no control boosts, no brakes and he used the entire 14,000 ft runway. On preflights, sometimes they would find long cracks in the aluminum skin. These are just a few of the stories he told me about his least favorite aircraft.
Amazing there weren't a lot of accidents given these design characteristics.