DESIGN OF FLIGHTERAIRCRAFT

SUBMITTED BY MARYPRIYA.S &

KAVITHA.G

MILITARY AIRCRAFT INTRODUCTION: A Fighter aircraft is a military aircraft designed primarily for air-to -air combat with other aircraft, as opposed to a bomber, which is designed primarily to attack ground target by dropping bombs. The hallmarks of fighter are its small size, speed and manoeuvrability.

PARAMETERS Payload Cruise and max speed Cruise altitude Range Endurance Take off distance landing

DETAILED SPECIFICATIONSGENERAL CHARACTERISTICS: Length:29 ft 10 in(9.0m) Wingspan:34ft5in(10.56m) Height:13ft11in(3.95m) Wing area(18.30m^2m) Empty weight:6,989lb(3,170kg) Loaded weight:9,737lb(4,417kg) Max takeoff weight:10,,803lb(4,900kg)

PERFORMANCE: Maximum speed(395mph,635km/h) Combat radius:410nmi(471mi,759km)

Ferry range:559mi(900km) Service ceiling:37,434ft(11,410m)

Wing loading(180kg/m^2) Thrust/weight:1.26 Maximum g-load:-3.5/+9.5g

CONFIGURATION OF DIFFERENT TYPES AIRCRAFT

TYPES OF AIRCRAFTGEOMENTRICAL ANALYSIS: Gloster gladioter-2Length(m):8.36Wing span(m):9.83Height(m):3.15Wing loading(kg/m^3):85.5Aspect ratio:3.22Wing area(m^2):30Empty weight(kg):1462 NakajimaLength(m):7.53Wing span(m):11.31Height(m):3.28Wing loading(kg/m^3):83.35Aspect ratio:6.89Wing area(m^2):18.56Empty weight:1110

Henkelk1-27Length(m):8.40Wing span(m):11Height(m):3.2Wing loading(kg/m^3):69.9Aspect ratio:4.448Wing area(m^2):27.20Empty weight:1460 Bristol beaufighterLength(m):12.70Wing span(m):17.63Height(m):4.82Wing loading(kg/m^3):153Aspect ratio:6.65Wing area(m^2):46.73Empty weight:7072

Focke-wule fw190Length(m):9.10Wing span(m):10.50Height(m):3.95Wing loading(kg/m^3):241Aspect ratio:2.74Wing area(m^2):40.23

Empty weight:3200 Yakovle yak-3Length(m):8.50Wing span(m):9.20Height(m):2.39Wing loading(kg/m^3):181Aspect ratio:5.69Wing area(m^2):14.85Empty weight:2105

COMPARATIVE STUDY OF SPECIFICATION &PERFORMANCE

PERFORMANCEGloster gladiator-2 Crew:1 Cappacity( load) kg:2088 Altitude(b):455000 Servise ceiling9ft):65000 Range(km):3219 Max speed(km/h):2410 Take off weight(kg):38000

Nakajima KI-27 Crew:1 Cappacity( load) kg:1547 Altitude(b):65000 Servise ceiling9ft):59100 Range(km):2100 Max speed(km/h):2400 Take off weight(kg):2100

Henkal HE 51c Crew:1 Cappacity( load) kg:1900 Altitude(b):50000 Servise ceiling9ft):60000 Range(km):42000 Max speed(km/h):2410 Take off weight(kg):19200Bristol beaufighter Crew:1 Cappacity( load) kg:10500 Altitude(b):50000 Servise ceiling9ft):65000 Range(km):5550 Max speed(km/h):2660 Take off weight(kg):30845

Fockewule fw190 Crew:1 Cappacity( load) kg:4417 Altitude(b):40000 Servise ceiling9ft):50000 Range(km):2346 Max speed(km/h):1900 Take off weight(kg):29064Yakolvlve yak-3 Crew:1 Cappacity( load) kg:2692 Altitude(b):31500 Servise ceiling9ft):57740 Range(km):1650 Max speed(km/h):2150 Take off weight(kg):15210

WEIGHT ESTIMATION

Engine start up and take offphase: 0.97<=wf/wi<=0.975o climb and accelerate to cruise condition phase:

wf/wi=0.99Cruise out to destination phase: R=V/C*L/D*ln(Wf/Wf)Combat Phase: Wi-Wf=Cmax*tmax*tcombat

Final weight=Required weight+fuel+1514.69 =38758.99lbs

DRAG ESTIMATION

Total drag is estimated as 215.416kN

POWER PLAN SELECTION

ENGINE RERUIREMENT:

Thrust at cruising altitude=47.35KN

s.no Engine Thrust per engine

1 Bristol beaughter 1200

2 Focke-wule 1250

3 Yakovlve yak-3 970

4 Bell p=59 8.9

5 Douglus FAD sky ray 71

AIRFOIL SELECTION &WING DESIGN

There are different series-6 airfoils they are as follows

Naca 63-215Naca 64-213Naca 64-215Naca 64-210Naca 64-213Amoung which Naca 64-213 selected due to following reasons;

64-213; series designation64-213; position of minimum preasure=0.4c64-213; design CL=0.2

PERFORMANCE CALCULATION

PERFORMANCE CALCULATION;At sea level altitude; Stress=20-H/20+H=1

At 4100mm altitude;

Stress=0-H/20+H=1 =0.818At 8000km altitude;Stress=0.667

s.no altitude (R/C)MAX 1(R/C)MAX1 0 5.148 1.5*10^-32 4100 1.414 2.2*10^-33 8000 5 4.1*10^-3

THANK YOU