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#1224

Kawanishi H8K

🇯🇵 Japan ·first flew 1941· maritime patrol flying boat

Kawanishi H8K, photo 1 of 5
1/5 Max Smith· Public domain

what is it?

The Kawanishi H8K was a large four-engined flying boat designed and produced by the Japanese aviation manufacturer Kawanishi. The Imperial Japanese Navy (IJN) designation was "Type 2 Flying Boat" (二式飛行艇, Nishiki Hikōtei); it was also referred to as "Type 2 Large-sized Flying Boat" (二式大型飛行艇, Nishiki-ō-gata hikō-tei), or "H2K flying boat" (二式大艇, Nishiki Taitei). The Allied reporting name for the type was "Emily".

How to recognise it: 4 piston engines with propellers · 38 m wingspan

base stats

  • size 32.5 tmax take-off weight
  • built 167made in total

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 85 years ago, in 1941.
  • Wingspan of 38 m: about 8 cars parked nose to tail.
  • Fully loaded it can weigh as much as 5 African elephants (~6 t each).

piston: A car-like piston engine turning a propeller: simple and cheap, the classic small plane.

spec sheet

first flight
1941-01
introduced
1942
retired
1945
status
retired
number built
167
role
maritime patrol flying boat
origin
🇯🇵 Japan
makers
Kawanishi Aircraft Company
engines
4× Mitsubishi MK4Q Kasei 22
crew
10
length
28.1 m
wingspan
38 m
height
9.2 m
max take-off weight
32.5 t
top speed
—
range
—
ceiling
8,760 m

Specs are for the version in the Wikipedia article's specification section. Blank means the sources don't say.

Sources: Wikidata Q696220, Wikipedia: Kawanishi H8K (CC BY-SA 4.0).Updated 2026-10-24.

stan runge 704880d source