The document discusses reusable launch vehicles (RLVs) which aim to reduce the high costs of space launches by recovering and reusing rocket components. Currently, 40% of launch costs come from building non-reusable rockets. RLVs could reduce costs by a factor of 100 by recovering first stage boosters, similar to how SpaceX has landed its Falcon 9 rocket boosters. The document outlines the history of rockets, compares conventional expendable launch vehicles to reusable ones, and describes the key components and launch process of an RLV. It discusses challenges of RLVs like heat stresses during flight and challenges of vertical landing, but notes the technology is feasible and could make space travel more routine and affordable.

1. REUSABLE LAUNCH
VEHICLE (RLV)
Presented by:
Manjunath Khelgi

2.  In todays world the majority of the space launch cost comes from
building a rocket.
 After completion of mission rocket is destroyed or cannot be reused.
 as 40% of the whole cost of the launch is in launch vehicle.
 If one can figure out how to effectively reuse rocket, cost of access to
space will be reduced by factor of 100.
 A fully reusable vehicle is never been done before. But partial recovery
has been done.
INTRODUCTION

3. • Cost of rocket is very high.
• If reusability is done then only cost of fuel and payload applicable
for space access.
• Time to refurbish a rocket is lesser than to build a new rocket
• Inter planetary travel become easier.
• Space debris also minimized.
• Access to space becomes easier.
Need / why RLV ?

4. • First rocket was built by GODDARD in 1926 .
• Primarily rocket was used as a missile, missile guided vehicle.
• On 4 October 1957 Soviet Union was launched a first satellite
called sputnik.
• Since 1957 total 8100 satellite from 40 countries was launched
• Only 4900 are in orbit in which 1900 satellites only operable
• 500 are in LEO ( low earth orbit)
• 50 in MEO(medium earth orbit) and rest are in GEO.
History / Background

6. Comparison between ELV and RLV
ELV
• Cannot be reused
• Cost of the mission is more
• Building a rocket takes more
time
• Interplanetary travel is not
possible
• Ex: Saturn-v, Delta, Atlas
RLV
• It can be reused
• Missions cost becomes less
• It requires less time for recovery
of rocket
• Interplanetary travel becomes
more easier
• Ex: Falcon-9, Falcon heavy

7. construction of a rocket

8. Rocket consist of a 4 system for operation of complete mission.
1. Structural system: from top to bottom surface
2. Payload system: depends on mission( cargo, satellite etc.)
3. Guidance system: control system of mission
4. Propulsion system: propellants are used get required thrust
PARTS OF ROCKET

9.  The rocket works on the basis of Newton 3rd law of motion
 The THRUST produced by a rocket is on the basis of Newton
3rd law of motion
The THRUST produced is depend on the nozzle of the rocket
WORKING PRINCIPLE OF ROCKET

10. Where,
 F – thrust force
 m – mass flow rate
 V e-exit velocity ( > 11.2 km/s )
 P e – exit pressure
 P o – free stream pressure ( surrounding air pressure )
 Ae –area at the exit of the nozzle
Contd.

11. Working of RLV

12. 1. Vertical take off
2. Booster separation
3. Main Engine Cut Off ( MECO )
4. First stage separation
5. Second stage ignition
6. Fairing separation
7. Second Engine Cut Off ( SECO )
8. Payload separation
9. Flip maneuver
10. Boost back burn
11. Grid fins deploy (Aerodynamic guidance )
12. Landing burn
13. Vertical landing ( Retro propulsion )
Steps involved in working of RLV

13. • Two types of vertical landing can be done to ensure the safety of a
rocket.
1. Landing on ocean : the drone ship is used for the landing of
rocket engine.
2. Landing on site : the landing sight is prepared for the vertical
landing of a engine.
Landing methods of RLV

15. 1. Space x: On december 2015 falcon 9 becomes first rocket that
landed safely after completion of mission.
2. ISRO : On may 2016 ISRO also conducted a test RLV-TD a
prototype which is also successful.
Reusable Rocket Development

16.  Cost is reduced by 40 percent.
 Boosters and Stage 1 can be reused.
 Time to build a rocket for next mission is reduced.
 Promotes the interplanetary travel i.e. space travel.
 Space debris is reduced.
Advantages

17.  The RLV experiences a major temperature changes, high
pressure and vibration during its flights.
 Refurbishing a rocket engine is also a expensive and
take long time for repair.
 Climate condition should be normal while take off and
also during landing.
 Vertical landing is very complicated and expensive.
Disadvantages

18.  The RLV can be used to send satellite to its orbits.
 Used to send a cargo to International Space Station.
 In future, the RLV’s are planned to take a human in
MARS.
 The RLV can also be used as a commercial space crafts,
a Space travel.
Applications

19.  Reusable launch vehicle system have the highest development
cost and technical risks, but the technology is within the current
state of art.
 if one can figure out how to effectively reuse rockets just like
airplanes, the cost of space access becomes less.
To make space flight routine and affordable, and make humans a
multi planet species.
Conclusion

20. Thank you