Two news about commercial manned ships


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Two news about commercial manned ships

1. SpaceX completed 12 parachute tests in a week.

On November 3, SpaceX published a short video test the parachute system that is being created for the Dragon 2 manned spacecraft by Airborne Systems. The same company is involved in the creation of parachutes for the Boeing Starliner ship and NASA's Orion heavy manned spacecraft.

The current version is already the third for Dragon 2 parachutes. During tests of the second iteration of the parachute system (Mark 2), problems arose that caused NASA concern. As a result, SpaceX decided to use a new version of parachutes on the manned spacecraft – Mark 3. It uses slings made of zylon, a more durable analogue of nylon.

In the course of the last, 15th discharge account, the efficiency of the parachutes was checked in case of failure of one of the four domes. The tests took place on October 31 and became the first discharge for parachutes of the Mark 3 version, in which the domes worked simultaneously. Prior to this, 12 tests were carried out during the week, during which the work of the domes was worked out separately.

According to SpaceNews, tests of new parachutes did not start very smoothly. The first two parachute drops failed. During these discharges, the operation of the parachutes was checked in excess of the maximum load. After the first failures, the design of the parachutes was changed, and further tests were successful.

2. On Monday, Starliner’s emergency rescue system will be tested.

Boeing has scheduled a Starliner Emergency Rescue System (CST-100) test on Monday November 4. The test will take place at the White Sands Missile Range military training ground in the state of New Mexico at 17:00 Moscow time (the “window” for launch will last three hours). The purpose of the tests is to demonstrate the ability of the ship to quickly move away from the crashing missile and to ensure a soft landing of the returned vehicle along with the crew.

The test model of the Starliner was visited on a specially constructed test bench. Upon receiving the accident command, he will turn on the four engines of the emergency rescue system for 5.1 seconds. The total thrust of these engines is about 73 tf. At the same time, orbital orientation control engines should work, the task of which is to ensure the correct orientation of the ship in space for the deployment of parachutes. These engines will last 10.1 s.

The separation of the parachute compartment lid and the frontal heat shield should take place after passing the maximum height at 19 seconds of flight. Then, brake parachutes will be released for 21.2 s, followed by main parachutes for 26.4 s.

Air cushions that cushion the blow to the ground will be activated for 61 seconds of flight. It is expected that the maximum lifting height of the ship will be 1.37 km, it will land 2.1 km from the stand. The entire flight will take 95 seconds.

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