R-4 vs TH-55 Osage

R-4

American helicopter from the 1940s, first to be produced in quantity, used primarily in World War II for rescue operations.

Origin country	🇺🇸 United States
Category	Military Helicopters
Manufacturer	Sikorsky
First flight	13 January 1942
Year introduced	1944
Number produced	131 units
Average unit price	$0.0 million

American training helicopter, prominent during the Vietnam War, extensively utilized for instructional duties by the US Army.

Origin country	🇺🇸 United States
Category	Military Helicopters
Manufacturer	Hughes
First flight	2 October 1956
Year introduced	1961
Number produced	2800 units
Average unit price	$-- million

Photo of TH-55 Osage by Alf van Beem.

Which is faster, the R-4 or TH-55 Osage?

The TH-55 Osage is faster with a maximum speed of 140 km/h compared to the R-4's 121 km/h, a difference of 19 km/h.

Which has longer range, the R-4 or TH-55 Osage?

The TH-55 Osage has a longer range at 480 km compared to the R-4's 210 km.

Which can fly higher, the R-4 or TH-55 Osage?

The TH-55 Osage has a higher service ceiling at 4,000 meters (13,123 ft) compared to the R-4's 2,400 meters (7,874 ft).

Which is heavier, the R-4 or TH-55 Osage?

The R-4 has a higher maximum takeoff weight at 1,150 kg compared to the TH-55 Osage's 703 kg.

Which is larger, the R-4 or TH-55 Osage?

The R-4 is longer at 10.8 meters compared to the TH-55 Osage's 8.8 meters.

Which entered service first, the R-4 or TH-55 Osage?

The R-4 entered service first in 1944, 17 years before the TH-55 Osage which entered service in 1961.

Which has been built in greater numbers, the R-4 or TH-55 Osage?

The TH-55 Osage has been produced in greater numbers with 2,800 units compared to 131 units of the R-4.