The video noted 360 MPH, not Knots Indicated Airspeed. At Sea Level, the Max Speed on a V-22 is 275KIAS which comes out to 316MPH and around 300KIAS at 15000ft which is 345MPH. Depending on conditions, your indicated airspeed on low level runs will vary but bear in mind that the 275KIAS Max speed at Sea Level is a limitation on the prop rotors(torque & RPM) and Maximum Continuous Power settings (keep the temps in the green). Add the weight of full and troops & gear, the max speed limit drops even more (depending on the conditions). In High/Hot conditions, a regular helicopter is seriously challenged in being able to takeoff and land vertically. The V-22 has an advantage in STOL mode but in Vertical Mode in those conditions, it has much greater limitations than say a CH-46, CH-47 or CH-53. The other thing is that the V-22 will not Auto-Rotate like a helicopter. If somehow power was lost on both engines, it has a limited glide/auto-rotate capability but those blades windmilling are going to be very draggy so it's going to come down fast and hard. As already mentioned, if you lose and engine and the interconnecting power transfer is successful, you can't land vertically on one engine even in the best of conditions. The V-22 is an awesome machine but the risk (and cost) on it is still very high.
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