what is it?
The McCulloch Model MC-4 is an American tandem-rotor helicopter and was the first helicopter developed by McCulloch Aircraft Corporation, a division of McCulloch Motors Corporation. It was evaluated by the United States Army as the YH-30 and the United States Navy as the XHUM-1.
How to recognise it: 1 engine · 6.7 m main rotor
base stats
Bars compare against all aircraft: 3,500 km/h, 20,000 km, 850 seats; size and number built on a log scale up to 640 t (An-225) and 45,000 built (Cessna 172).
fun facts
- First flew 75 years ago, in 1951.
spec sheet
- first flight
- 1951
- number built
- —
- role
- light helicopter
- makers
- McCulloch Aircraft Corporation
- engines
- 1× Franklin O-335-6 (6A4-200-C6) piston
- length
- 9.8 m
- rotor diameter
- 6.7 m
- height
- 2.8 m
- max take-off weight
- 907 kg
- top speed
- 169 km/h
- range
- 322 km
Specs are for the version in the Wikipedia article's specification section. Blank means the sources don't say.
Sources: Wikidata Q6800769, Wikipedia: McCulloch MC-4 (CC BY-SA 4.0).Updated 2026-10-24.