My car uses high pressure air for several functions. One of the bottles will have a regulator that supplies air pressure to the transmission brake clutch pack to prevent the car from moving when I get the car staged. When I press the transmission brake button, an electric solenoid supplies 450 pounds of air to the clutch pack, which locks the input shaft of the transmission. When I release the transmission brake button, the solenoid closes and bleeds the pressure off of the clutch pack, allowing the car to launch.
The second bottle has 2 regulators on it. The first one supplies 250 pounds of air pressure to shift the transmission. The transmission has 2 solenoid valves or 2 manual air control valves to control the shifts of the car. The solenoids are used if automatic shifting is desired. In automatic mode, the solenoids are controlled by a computer that can be programmed to shift based on the rpm of the engine, time from the release of the transmission brake, or a combination of the two.
In manual shifting mode, I will manually push knobs on the transmission that will shift the transmission. Manual mode requires that I pay attention to rpm and a shift warning light that tells me when to push the buttons. There will be lots of stuff going on in the car during a run so this will be overwhelming at first!
The second regulator on tank 2 will drop the air pressure to 150 pounds. This air pressure will be used to activate an air cylinder to pull the parachute release cables out of the parachute packs, releasing the parachutes. There is also air activating air cylinders to push the parachutes out of the parachute packs.
I also mounted the fuel shutoff lever bracket. The fuel shutoff lever closes the fuel inlet to the fuel pump to stop the flow of fuel and kill the engine.
All of these functions are very important in a 250 mph car!
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