The Nagler-Rolz NR 54 is a German experimental foldable backpack helicopter developed during World War II.

The NR 54 was developed by Austrian engineers Bruno Nagler and Franz Rolz.

Both prototypes were powered by a piston engines mounted on the rotor blades, with the V1 having a single 24 hp (18 kW) engine driving two contra-rotating propellers, and the V2 having two 8 hp (6.0 kW) single-cylinder variants of the Argus As 8.

These problems were not fixed on the NR 54 V1 and V2, which were not flown before testing was halted by the Soviet advance in Vienna.

The NR 54 V1 remained in Austria, while the V2 was captured by American forces after the war, who evaluated it at Freeman Army Airfield.