The Royal Navy has a problem, which is that with a typical weapons load in a tropical environment, the F-35B STOVL variant of the JSF cannot land without jettisoning some of its (very expensive) stores.

Their solution is the Shipboard Rolling Vertical Landing, for which the Royal Navy has just paid Lockheed $18 million for a viability study, in which the F-35 will land on a carrier deck in a combined wing borne and thrust borne mode, at about 60 kts airspeed without benefit of arrester gear.

So, you have an aircraft weighing something north of 35,000 pounds, which is going to hit the deck at 60+ kts, though the relative speed will likely be closer to 30 kts, and it will then be manually braked to a stop.

What a bloody mess.