Kaman K-225

what is it?

The Kaman K-225 is an American experimental helicopter developed by Kaman Aircraft. One example was modified to become the world's first gas turbine-powered helicopter.

🔎How to recognise it: 1 piston engine · 11.6 m main rotor

base stats

• speed 117 km/htop speed
• size 1,226 kgmax take-off weight
• built 7made 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 79 years ago, in 1947.
• 🚗Rotor of 11.6 m: about 3 cars parked nose to tail.

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

spec sheet

first flight

1947-01-15

status

retired

number built

7

role

experimental helicopter

origin

🇺🇸 United States

makers

Kaman Corporation

engines

1× Lycoming O-435-2

length

6.8 m

rotor diameter

11.6 m

height

3.4 m

max take-off weight

1,226 kg

top speed

117 km/h

range

—

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