- Four-Stroke Engine (A07870) £19.99
- This Collectors' Series model illustrates the principle of the four-stroke cycle in an internal combustion engine. Th...
- Maudslay's 1827 Paddle Steamer Engine (A08870) £24.99
- Although conceived as early as 1785, the oscillating cylinder engine did not appear until 1827 when Joseph Maudslay (18...