| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Britain's Air Ministry ridiculed Frank Whittle's idea for this type of engine in the 1920s, but by the 1950s no one was laughing | a jet engine | $400 | J | INVENTORS & INVENTIONS | 2023-02-01 | #8798 | |
| In the 1920s, Frank Whittle, who grew up making model airplanes, designed the first working engine of this type | a jet engine | $200 | J | INVENTORS & INVENTIONS | 2007-12-26 | #5363 |