Another interesting article from Strategy Page:
The U.S. Navy has grounded 16 percent (104 of 635) of its older (A/B/C/D models) F-18 fighters. The reason is the discovery of cracks in the airframe. Small cracks were expected to show up eventually, the result of all the stress put on the metal from violent aerial maneuvers, and carrier landings. But in this case, the cracks were showing up sooner than expected. Most of the grounded aircraft can still be flown in an emergency. All these older F-18s have to be examined, and those found with cracks (usually where the wing meets the fuselage), repairs can be made.
Over the last few years, the navy has found that both their older F-18C Hornet fighters, and their newer F-18E “Super Hornet” are wearing out faster than expected. This was sort of expected with the F-18Cs, which entered service during the late 1970s and early 80s. These aircraft were expected to last about twenty years.
This is of interest to a lot of American allies, as the F-18 is in use by many of their air forces. Partly due to the faster aging of the US aircraft, the manufacturer is still producing spare parts (which benefits both the US Navy and allied air forces).
One very interesting detail I didn’t know:
There are actually two quite different aircraft that are called the F-18 (the A/B/C/D version, and the E/F/Gs). While the F-18E looks like the original F-18A, it is actually very different. The F-18E is about 25 percent larger (and heavier) than the earlier F-18s, and has a new type of engine. By calling it an upgrade, it was easier for the navy to get the money from Congress. That’s because, in the early 1990s, Congress was expecting a “peace dividend” from the end of the Cold War, and was slashing the defense budget. There was a lot of commonality between the two F-18s, but they are basically two different aircraft.
Rather like the Royal Navy managing to sneak their last generation of aircraft carriers through the budget process by calling them “through-deck cruisers”.
