SAWE Report - Cal Poly San Luis Obispo

List of Figures
Figure 1.1 - Design Mission Profile _______________________________________________ 1
Figure 1.2 - F-111 Aardvark _____________________________________________________ 3
Figure 1.3 - F-15 Strike Eagle____________________________________________________ 4
Figure 1.4 - F-117 Night Hawk___________________________________________________ 4
Figure 1.5 - B-1B Lancer _______________________________________________________ 5
Figure 1.6 - B-2 Spirit__________________________________________________________ 5
Figure 2.1 - Historical Weight Fractions ___________________________________________ 7
Figure 2.2 - Constraint Plot______________________________________________________ 9
Figure 3.1 - Nergal ___________________________________________________________ 10
Figure 3.2 - Jackhammer ______________________________________________________ 10
Figure 3.3 - Interdictor ________________________________________________________ 10
Figure 3.4 - Big Paulie ________________________________________________________ 10
Figure 3.5 - Initial Configuration ________________________________________________ 11
Figure 3.6 - Radar Return of Initial Configuration___________________________________ 12
Figure 3.7 - Second Configuration _______________________________________________ 13
Figure 3.8 - Current Configuration _______________________________________________ 14
Figure 3.9 - Inboard Layout ____________________________________________________ 14
Figure 3.10 - Inboard Layout Continued __________________________________________ 15
Figure 4.1 - Stealth Considerations_______________________________________________ 16
Figure 4.2 - RCS Model Faceting________________________________________________ 17
Figure 4.3 - Radar Cross Section at 0º Lookup Angle ________________________________ 19
Figure 4.4 - Radar Cross Sections at 15º Lookup Angle ______________________________ 20
Figure 4.5 - Radar Cross Sections for a Radial Sweep________________________________ 21
Figure 5.1 - Optimization of Wing Area and Aspect Ratio ____________________________ 22
Figure 5.2 - Effect of Wing Leading and Trailing Edge Sweep on Aircraft RCS ___________ 24
Figure 5.3 - Wing Planform ____________________________________________________ 25
Figure 5.4 - Effect of Root Chord Thickness on Wing Weight and Cross Sectional Area ____ 26
Figure 5.5 - Effect of Root Chord Thickness on Fuel Burn ____________________________ 27
Figure 5.6 - Airfoil Section at MAC______________________________________________ 28
Figure 5.7 - Airfoil Section at Tip of Trailing Edge Flap______________________________ 28
Figure 5.8 – Variation in Lift Curve Slope with Mach Number_________________________ 29
Figure 5.9 - Lift Distribution of Wing with and without Twist _________________________ 30
Figure 5.10 - Subsonic Wing Lift Curve __________________________________________ 30
Figure 5.11 - Transonic Area Distribution _________________________________________ 31
Figure 5.12 - Supersonic Area Distribution (Mach 1.6) _______________________________ 32
Figure 5.13 - Drag Build-Up at 50,000 ft, Mach 1.6, Maneuver Weight, and 5% Static Margin 33
Figure 6.1 - VAATE Goals_____________________________________________________ 38
Figure 6.2 - Thrust Curves for Altitudes from Sea Level to 70,000 ft (21,300 m)___________ 39
Figure 6.3 - Military TSFC Curves for Altitudes from Sea Level to 70,000 ft (21,300 m) ____ 40
Figure 6.4 - Engine Sizing Plot__________________________________________________ 41
Figure 6.5 - Optimum Deflection Angle for Mach 1.6 Flow ___________________________ 42
Figure 6.6 - Pressure Recovery for a Two Shock versus Three Shock Inlet _______________ 42
Figure 6.7 - Inlet Area Ratio____________________________________________________ 43
iv