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The competition heats up: For the next test flight of New Shepard, tentatively scheduled for early October, Blue Origin plans to test the capsule’s launch abort system, separating the capsule prematurely from its propulsion module during launch.
“We’ll be doing our in-flight escape test with the same reusable New Shepard booster that we’ve already flown four times,” Bezos wrote. “About 45 seconds after liftoff at about 16,000 feet, we’ll intentionally command escape. Redundant separation systems will sever the crew capsule from the booster at the same time we ignite the escape motor. The escape motor will vector thrust to steer the capsule to the side, out of the booster’s path. The high acceleration portion of the escape lasts less than two seconds, but by then the capsule will be hundreds of feet away and diverging quickly. It will traverse twice through transonic velocities—the most difficult control region—during the acceleration burn and subsequent deceleration. The capsule will then coast, stabilized by reaction control thrusters, until it starts descending.”
If all goes well, the capsule will make a normal descent under three drogue parachutes, and then its main parachutes, to the ground. And the booster? It may not fare so well. It was not designed to survive an in-flight escape, Bezos noted, as it will be slammed with 70,000 pounds of off-axis force and hot exhaust. At Max-Q it is not clear whether the propulsion module will survive—in some Monte Carlo simulations it does, but in others it does not.
I suspect they already have at least one new propulsion module ready to go, and plan to use it with the reused capsule in future tests.