The absence of air vents provides improved drag at medium and low speeds.

The most promising solution at the moment is the technology that SpaceX is developing: supersonic retropropulsion.

The Spanish company is studying a solution based on parachutes and on the retropropulsion.

The Manhattan Toy Company recalls Pull-Back Speedy Jets

The Manhattan Toy Company recalls Pull-Back Speedy Jets

The knot increases the pullout strength of the suture even in soft bone, provides increased suture fixation, and eliminates the anchor 'pull back.'

An uncrewed version is expected to visit the red planet in 2020 to around 2023, using a new technology called supersonic retropropulsion.

The projectile (50) includes a forward end (52) that forms a cavitation void (30) around the projectile (50) in water, avoiding water drag on the remainder of the projectile (50).

Immerse yourself in this imaginative venue, where you can invite an Elephant to your table, or ride a Squid powered by retropropulsion.

Inserting onto a Mars transfer orbit, capturing Mars orbit and landing on Mars using retropropulsion

This technique is not suitable for long touring boards because it takes a long time to rotate them using this technique, back paddling will work much better.

The ERV would use a limited amount of methane/oxygen propellant to perform supersonic retropropulsion of the combined payload upon Mars entry, bringing the assembly to subsonic speeds.

It is designed for smaller payloads and will also use retropropulsion as well as a large aerodynamic surface on its underside to decelerate during its return flight.

1961 April 12: "separation failure": During the flight of Vostok 1, after retrofire, the Vostok service module unexpectedly remained attached to the reentry module by a bundle of wires.

1961 April 12: "separation failure": During the flight of Vostok 1, after retrofire, the Vostok service module unexpectedly remained attached to the reentry module by a bundle of wires.