Vehicle launch system and method
The present disclosure relates to a launch system and method. The launch system and method can include at least a preliminary accelerator tube system (PAT) that can be combined with one or more of a main accelerator tube system (MAT), a flight test tube, or a soft catch. The PAT alone or combined with the MAT can be used for launch of a vehicle for testing and/or for delivery of a payload.
1 . A system comprising:
a vehicle including, as a part thereof, aerodynamic controls or guidance systems;
a preliminary accelerator tube configured to accelerate the vehicle therethrough;
a flight test tube arranged to receive the vehicle from the preliminary accelerator tube; and
a soft catch arranged to receive the vehicle from the flight test tube and configured to decelerate the vehicle;
wherein the flight test tube is configured to receive injected gas that subjects the vehicle to aerodynamic forces so that the system is effective to test the aerodynamic controls or guidance systems that are a part of the vehicle.
2 . The system of claim 1 , wherein the preliminary accelerator tube is configured to accelerate the vehicle by creation of a pressure wave upstream of the vehicle.
3 . The system of claim 2 , wherein the preliminary accelerator tube is configured to create the pressure wave with heated gas passing through a pressure-releasable valve.
4 . The system of claim 2 , wherein the preliminary accelerator tube comprises a chamber configured to receive a gas, an electric heater configured to heat the gas, and a valve assembly downstream of the chamber and in fluid communication therewith, the valve assembly being configured to release the gas after the gas is heated with the electric heater.
5 . The system of claim 4 , wherein the electric heater is an external heating system.
6 . The system of claim 4 , wherein the electric heater is an internal heating system.
7 . The system of claim 4 , wherein the chamber is configured for reverse longitudinal movement relative a direction in which the vehicle is accelerated.
8 . The system of claim 7 , further comprising one or more recoil control elements associated with the chamber.
9 . The system of claim 1 , further comprising a gas stripper tube positioned between the preliminary accelerator tube and the flight test tube, the gas stripper tube being configured for withdrawal of gas therefrom.
10 . The system of claim 1 , wherein the vehicle includes a pusher plug configured to push the vehicle through the preliminary accelerator tube.
11 . The system of claim 10 , wherein the pusher plug is configured to separate from the vehicle upstream from the flight test tube.
12 . The system of claim 1 , wherein the flight properties of the vehicle include one or more aerodynamic properties.
13 . The system of claim 1 , wherein the soft catch comprises a tube with a plurality of sections that are each separately filled with different gases, the different gases differing based on one or more of composition, molecular weight, temperature, and density at constant pressure.
14 . The system of claim 13 , wherein the plurality of sections are separated from one another by a sealing membrane.
15 . The system of claim 13 , further comprising a vent tube surrounding the tube with the plurality of sections that are each separately filled with different gases.
16 . The system of claim 13 , further comprising one or more vents in the tube with the plurality of sections that are each separately filled with different gases.
17 . The system of claim 1 , wherein the soft catch comprises a tube with an ablative material arranged on at least a portion of a surface of the tube.
18 . The system of claim 17 , wherein the ablative material is configured as a ramp within the tube of the soft catch.
19 . The system of claim 17 , wherein the ablative material is positioned within at least one trough formed along a length of the tube of the soft catch.
20 . The system of claim 17 , wherein the vehicle includes a gas bearing arranged to interact with the ablative material.
21 . The system of claim 20 , wherein the gas bearing is configured as one or more bands around the vehicle.
22 . The system of claim 20 , wherein the gas bearing is arranged on one or more arms that extend from the vehicle.
23 . The system of claim 22 , wherein the one or more arms are retractable.