Vendetta Final Proposal Part 2 - Cal Poly

11 Performance
11.1 Specific Excess Power Requirements
Compliance with RFP specific excess power requirements is best shown using specific excess power envelopes
including those required as measures of merit. Figure 11.1 shows the 1-g military specific excess power envelope. The
RFP requirement of 0 ft/s at Mach 1.6 and 50,000 ft is met with 33.7 ft/s specific excess power. The 1-g maximum
(afterburner) specific excess power envelope, in Figure 11.2, shows that the RFP requirement of 200 ft/s is met with a
value of 212.5 ft/s. This envelope also shows that the maximum Mach number at 36,000 ft measure of merit is 2.18.
The 2-g maximum specific excess power envelope, in Figure 11.3, shows that the RFP requirement of 0 ft/s is met with a
value of 8.0 ft/s. This requirement is design driver for the thrust produced by the propulsion system. The 5-g maximum
specific excess power envelope and maximum sustained load factor envelope required as measures of merit are shown in
Figure 11.4 and Figure 11.5 respectively.
70,000
60,000
RFP Requirement 0
50,000
P s = 0 ft/s
Altitude (ft)
40,000
30,000
Stall Limit
50
100
150
150
200
20,000
10,000
Flaps
200
300
400
q Limit
0
0 0.5 1 1.5 2 2.5
Mach
Figure 11.1 - 1-g Military Specific Excess Power Envelope at Maneuver Weight
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