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Space Shuttle: Ready for Flight

12 Feb 2023 @ 17:05 - 17:20

XPF-Chip-Doherty-Seminar
Overview :
Chip Doherty provides insight into The Space Shuttle, arguably the most incredible Space and Human Transportation Vehicle ever conceived and implemented by Mankind and his senior NASA Systems Engineer role. Thousands of Engineers, Rockets... more

Seminar

Details

Chip Doherty provides insight into The Space Shuttle, arguably the most incredible Space and Human Transportation Vehicle ever conceived and implemented by Mankind and his senior NASA Systems Engineer role.

Thousands of Engineers, Rockets Scientists, Technicians and Support Management Staff spent decades perfecting the Art and Science of Human Transportation into Low Earth Orbit.

System Summary
The Space Shuttle utilizes three main engines supported by twin Solid Rocket Boosters.  The three main engines will burn approximately 8.5 minutes into the flight achieving a speed of 17,500 miles per hour.

The main engines are re-useable, high-performance liquid propellant rocket engines with variable thrust; the propellant fuel is liquid hydrogen (LH2), and the oxidizer is liquid oxygen (LO2).

The Main Propulsion System (MPS) provides the necessary fluids to the Space Shuttle Main Engines (SSME).  The fluids include Liquid Hydrogen (LH2) at -423 deg. F., Liquid Oxygen (LO2) at -297degrees and Gaseous Helium (GHe).  The LH2 and LO2 are loaded into the External Tank (ET) before the flight. When the LH2 and LO2 flow into the SSME combustion chamber, they burn, heating each chamber to over 6000 deg F. and producing over 1.4 million pounds of thrust to propel the Shuttle into orbit.  Over 385,000 gallons of LH2 (fuel) and 144,000 gallons of LO2 (oxidizer) are burned by the SSMEs during 8 ½ minutes of operation.  

The liquid Hydrogen tank is an aluminium structure of fusion welded barrel sections, five-ring frames, and forward and aft ellipsoidal domes. Its operating pressure range is 32 to 34psi, and a dry weight of 28,000 lbs.

The LO2 tank is aluminium, composed of a fusion assembly of pre-formed chem.-milled cores, panels, machined fittings, and ring cores.  It operates in a pressure range of 20 to 22 psi, weighing 12,000 lbs.

The LH2 and LO2 Structures comprise the completed makeup of the external tank.  The inter-tank, which separates the two tank assemblies, is missing from this description.

The three orbiter hydraulic systems provide hydraulic pressure to the main propulsion system for thrust vector control (TVC) and to actuate engine valves on each SSME.  

During engine thrusting, propellants under ET tank pressure flow from the ET to the Orbiter through two umbilicals, one for LH2 and the other for LO2.  Within the Orbiter, the propellants pass through a system of manifolds, distribution lines, and valves to the main engines.  The valves within the Orbiter are under the direct control of the Orbiter computers and are pneumatically actuated.  

Two basic types of valves are used, pneumatically actuated and electrically actuated.  

The Orbiter Helium System consists of seven helium supply tanks and associated regulators, check valves, distribution lines, and control valves.

A POGO suppression system prevents the transmission of low-frequency flow oscillations into the high-pressure turbo-pump and ultimately prevents main combustion chamber pressure (engine thrust) oscillation.   

The three orbiter hydraulic systems provide hydraulic pressure to the main propulsion system for thrust vector control (TVC) and to actuate engine valves on each SSME.

Basics

Title
Space Shuttle: Ready for Flight
Speaker
Chip Doherty
Date
12 Feb 2023
Time
17:05 - 17:20
Duration
15 min

Venue

Expo Centre
Sharjah
61110
United Arab Emirates
+ Google Map
Phone
+971 65 123456

Attending the auditorium requires a Festival Pass
You can get your FREE 7-day Festival Ticket HERE.

When attending auditorium talks, we kindly ask that you take your seats at least 5 minutes before the scheduled start time to avoid disturbing others by entering after the start.