Bell (model 205) UH-1D (1962) had a longer fuselage than previous models, increased rotor diameter, increased range, and more powerful Lycoming T53-L-9A or T53-L-11D 1100 shp engines, with growth potential to the Allied Signal Engines (ASE) T53-L-13B 1400 shp engine. The "towel rack" FM antenna and pitot were located on top of the cabin on the UH-1D. The UH-1D also featured a larger double windowed sliding door, and small single window hinged door, just behind the pilot's door. The UH-1D, redesigned to carry up to 13 troops, with a crew of two, reached Vietnam in 1963. The MedEvac version UH-1V could carry six stretchers and one medical attendant. The UH-1D has a range of 293 miles (467km) and a speed of 127 mph (110 knots). UH-1Ds were built under license in Germany. The primary armament subsystem used with the UH-1D/UH-1H Huey is two door mounting M60D 7.62mm machine guns on the M23 armament subsystem.
1st Cavalry Division UH-1Ds; in these first battles they didn't have any mounted weapons
