The Zero Emission High-Speed Transport (ZEHST) is a supersonic jet project aimed at reducing long flight times from 10-12 hours to 2.5 hours while cutting carbon and NOx emissions by 90%. It is designed to fly at Mach 4, using a combination of biofuels and multiple propulsion systems including turbojet, rocket engines, and ramjets. Advantages include eco-friendliness, comfort, and speed, while challenges involve high costs, engine transitions, and material durability.

1. ZERO EMISSION HIGH SPEED
TRANSPORT
BY – A.PRIYANK
09M91A2101

2. INTRODUCTION
• Zehst is a Supersonic Transport
jet project by EADS and
French-japan
• It began in 2006 and was
displayed in Paris Air
show2007
• The Aim is to reduce Long
Hour Flights from 10 -12 hrs.
to 2.5hrs and Reduce the
Carbon ,NOx emissions by 90%
• Providing FAST CLEAN and
SAFE transportation.

3. Characteristics
• It is projected to fly at Mach
4, 32 km above the
ground, carrying 50 to 100
passengers.
• Runs with Combination Of
Three Propulsion systems
• 2Turbo jet engine, 3Rocket
engine boosters and then Two
under winged Ramjet engines
• Propelled by Biofuel made of
seaweeds ,liquid Hydrogen
and oxygen

4. Operations
• Stage one turbojet engines running
on biofuel used for a conventional
runway take-off and climb at speeds
of Mach 0.8.
• Stage two Ignition and operation of
two Hydrogen/liquid oxygen-
powered cryogenic rocket engines
enable the aircraft to continued
steep climb accelerating up to a
speed of Mach 2.5
• In the final phase two air breathing,
hydrogen fueled ramjets would take
the aircraft to an optimum Mach
number 4 and an altitude of around
32 km.

5. ADVANTAGES
• It is an Eco friendly engine emits water
vapor in atmosphere and runs on bio
fuel
• Can reach any point in the world by
maximum time of 3hrs
• Fastest and silent commercial
supersonic aircraft ever built since
(Concorde)
• Gives High speed ,High comfort
travelling 4times faster then speed of
sound,
• Passengers will have a comfortable in-
flight experience without requiring any
special equipment or training.
• would feel mild acceleration forces, not
exceeding 1.2g.

6. Disadvantages
• High Cost
• Storage of Propellant requires large
space
• Heavy weight

7. Technical Challenges
• Finding lightweight smart materials
capable of resisting for high stress
levels and temperatures on the
exterior skin of aircraft during a large
number of consecutive flight cycles
• Examining ways to reduce sonic
booms
• Managing the engine transition
between the three propulsion modes
• altering airflow velocities, Closing
and opening of alternate air entry
points

8. FUTURE SCOPE
• Paves a way to more
emerging technologies in
more fuel-
efficient, comfortable and
high speed aircrafts
• Leads to more reduction of
Green house gas emissions
• Revolutionizing future Air
transportation and Navigation
systems
• Making more Hypersonic
sub- orbital vehicles

9. THANK YOU