THEN, it is the start of perimenopause, even if cycles are regular and normal in length. In saying this we differ from the official, current consensus4. Whatever changes you experienceâeverything about perimenopause is variable. It is variable within one woman.
Deck-level view of the catapult track aboard museum ship USS Hornet, with an A-4 in launch position. An aircraft catapult is a device used to launch aircraft from shipsâin particular aircraft carriers âas a form of assisted take off.
If a catapult developed 150 mph speed, and the wind speed is 10 mph, and the ship is heading into the wind at 10 mph, an aircraft with a 170 mph go/ no go threshold would be pushing the envelope. This is why most carriers like a 20 to 30 knot bow wind over the deck. It makes take offs possible and landings far easier.