Editing H engine (section)

===Aircraft engines===
[[File:CASM - Napier Sabre - 030906.jpg|thumb|[[Napier Sabre]] H-24 engine (starboard side)]]
*[[Lycoming Engines|Lycoming]], US
**[[Lycoming H-2470]] H-24 "[[hyper engine]]" (1930s) {{cvt|2300|hp}}
*[[Fairey Aviation]], UK
**[[Fairey Prince (H-16)]] (1939) – {{cvt|1500|hp}}
**[[Fairey Monarch]] (1939) – H-24 {{cvt|2240|hp}}
*[[Klöckner-Humboldt-Deutz DZ 710|Klöckner-Humboldt-Deutz DZ 720]] – H-32, 102.9 litres diesel
*[[D. Napier & Son]], UK.
**[[Napier Rapier]] (1929) – H-16 air-cooled vertical, 8.83 litres {{cvt|340|hp}}
**[[Napier Dagger]] (1934) – H-24, air-cooled vertical, 16.85 litres {{cvt|890|hp}}, a development of the Rapier
**[[Napier Sabre]] (1938) – H-24, water-cooled horizontal sleeve valves, 36.7 litres {{cvt|3500|hp}}.
*[[Pratt & Whitney]], US
**[[Pratt & Whitney X-1800|XH-2240]] - H-24, liquid-cooled,
**[[Pratt & Whitney X-1800|XH-2600]] - H-24, liquid-cooled,
**[[Pratt & Whitney XH-3130|XH-3130]] - H-24, liquid-cooled,
**[[Pratt & Whitney XH-3130|XH-3730]] - H-24, liquid-cooled,
*[[Rolls-Royce Eagle (1944)|Rolls-Royce Eagle]] (1944) – H-24, 46.2 litres, {{cvt|3200|hp}}.