Responsive Access Small Cargo Affordable Launch (RASCAL ...

Table 1: Propulsion Design Breakdown.
Engine Main Design Tool
First Stage F-100 TBEAT [5]
First Stage MIPCC AIAA Paper [6]
Second Stage Hybrid Historical MERs [7]
Third Stage Solid Historical MERs [7]
Turbofan Design:
The turbofans used in the RASCAL design are the Pratt and Whitney F-100s. As
noted earlier these engines are the same as those used on the F-15 and F-16 fighters. In
fact these engines were not chosen because of their performance. In fact the Pratt and
Whitney F-119, which powers the F-22, provides over 20% more thrust. The F-100 was
chosen due to the availability, and therefore low cost, of the engines. The characteristics
of the F-100 are provided in Table 2.
Table 2: F-100 Engine Characteristics [4].
Thrust 29,000 lbs
Weight 3,740 lbs
T/W Ratio 7.754
Length 191 in
Inlet Diameter 34.8 in
Max Diameter 46.5 in
Bypass Ratio 0.36
Pressure Ratio 32
The F-100 is a low bypass turbofan which offers both high performance and efficiency.
A diagram of the F-100 is included as Figure 9.
Figure 9: Pratt and Whitney F-100 Turbofan.
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