23-08-2012, 11:36 AM
DESIGN OF SUPERSONIC MULTI-ROLE FIGHTER AIRCRAFT
DESIGN OF ADVANCE SUPERSONIC MULTI-ROLE FIGHTER AIRCRAFT BY R.SURIYAHAWK99.pptx (Size: 138.49 KB / Downloads: 48)
MODERN FIGHTER AIRCRAFT REQUIREMENTS
Air superiority- controlling the air space within a limited area and within a length of time
Maneuverability – not top speed but climbing performance ,acceleration and turning speeds.
Stealth – seeing the enemy before they seeing you
aerodynamics – wing loading –aircraft weight/ wing area one of the most important
MODERN FIGHTER AIRCRAFT REQUIREMENTS
Range – ability of the aircraft to reach and cover the combat zone
Engine – thrust to weight ratio , favorable fuel consumption , low infrared and smoke
Avionics – vehicle and system management, reduced pilot workload, all weather capability.
Armaments –kind and quantity of stores on board
Reliability and Maintainability- systems have a high operational rate and are easy to repair
NEED OF SUPER SONIC FIGHTERS
A fighter aircraft is a designed primarily for air-to-air combat with other aircraft. Which are designed primarily to attack ground targets. The hallmarks of a fighter are its speed, manoeuvrability, and small size relative to other combat aircraft.
NEED OF SUPER SONIC FIGHTERS
In super sonic speeds we can easily find and destroy the target and return to base with super sonic cruising means : we ensure our protection at the same time we can easily destroy the enemy
Problems in super-sonic flight
We have to ready to face a lot of problems at super-sonic flight such us
Critical mach no
Drag divergence mach no
Sound barrier
Shock waves ( normal , bow and oblique shock waves)
DESIGN OF SUPER-SONIC FIGHTER
IN THREE MAJOR TYPES OF AIRCRAFT DESIGN ARE
CONCEPTUAL DESIGN
PRELIMINARY DESIGN
DETAILED DESIGN
1. Conceptual design
It depends on what are the major factors for designing the aircraft.
(a) Power plant Location:
The Power plant must be located in the fuselage in super sonic fighters .
(b) Selection of Engine:
The engine should be selected according to the power required i.e., thrust required.
1. Conceptual design
© Wing selection:
The selection of wing depends upon the selection of
(1) Low wing
(2) Mid wing
(3) High wing
- For a fighter the wing is mostly high wing configuration and anhedral.
- Sweep may be required in order to reduce wave drag.
2. Preliminary design:
Preliminary is based upon number of factors like Loitering, combat , supersonic cruising etc.
3. Detailed design:
In the detailed design considers each & every rivets, bolts, paints etc. In this design the connection & allocations are made.
Project requirement
To design a super sonic fighter aircraft
Range of about 5000 km with refuelling support & must carry armaments, missiles (possibly nuclear warheads)
To operate at transonic and super-sonic regions .
To operate at regional bases with low cost of operation & maintenance
Project requirement
Due to long range pilot work load must be reduced
The aircraft must be all weather, all terrain operation capable including the airbase.
To take up a load factor +9g to -3g.
SPECIFICATION
WE HAVE TAKE TECHNICAL SPECIFICATION OF SOME AIRCRAFT. SOME OF SPECS ARE
WEIGHT
WING SPAN
ASPECT RATIO
SPEED
MACH NUMBER
RANGE
SERVICE CEILING
WING LOADING
OPTIMUM VALUES
WEIGHT - 62786.25 kg
VELOCITY - 408 m/s
LIFT TO DRAG RATIO - 11.15
COEFFICIENT OF LIFT - 0.00137
COEFFICIENT OF DRAG - 0.0356
WING LOADING - 436.2 kg/m2
THRUST TO WEIGHT - 1.1
ASPECT RATIO - 3.369
RANGE - 1391 miles
ALTITUDE - 18170 m
WEIGHT ESTIMATION
DURING WEIGHT ESTIMATION THE MISSION PROFILE SHOULD BE CONSIDERED
TAXING & WARM UP
CLIMB
TAKE OFF
CRUISING
DESCEND TO COMBAT FIELD
COMBAT
CLIMB FROM COMBAT FIELD
CRUISING
LOITERING
DECENT
LANDING & SHUT DOWN
Phases of fighter supersonic
Phase 1 : Engine start and Taxiing
Phase 2 : Take-off
Phase 3 : Climb to cruise altitude
Phase 4 : Cruise
Phase 5 : descend to combat field
Phase 6 : combat
Phase 7 : climb from combat field
Phase 8 : cruise
Phase 9 : descend
Phase 10 : loiter and flying alternate field
Phase11 : landing and shut down