United States Naval Aviation Resource Center - A Warbirds Resource Group Site

Douglas R4D
Variants

R4D-1 Skytrain
USN/USMC version of the C-47

R4D-3
Twenty C-53Cs transferred to USN

R4D-5
C-47A variant 24-volt electrical system replacing the 12-volt of the C-47; redesignated C-47H in 1962, 238 transferred from USAF

R4D-5L
R4D-5 for use in Antarctica. Redesignated LC-47H in 1962

R4D-5Q
R4D-5 for use as special ECM trainer. Redesignated EC-47H in 1962

R4D-5R
R4D-5 for use as a personnel transport for 21 passengers and as a trainer aircraft; redesignated TC-47H in 1962

R4D-5S
R4D-5 for use as a special ASW trainer; redesignated SC-47H in 1962

R4D-5Z
R4D-5 for use as a VIP transport; redesignated VC-47H in 1962

R4D-6
157 C-47Bs transferred to USN; redesignated C-47J in 1962

R4D-6L, Q, R, S, and Z Variants as the R4D-5 series; redesignated LC-47J, EC-47J, TC-47J, SC-47J, and VC-47J respectively in 1962

R4D-7
44 TC-47Bs transferred from USAF for use as a navigational trainer; redesignated TC-47K in 1962

R4D-8
R4D-5 and R4D-6 aircraft fitted with modified wings and re-designed tail surfaces; redesignated C-117D in 1962

R4D-8L
R4D-8 converted for Antarctic use, redesignated LC-117D in 1962

R4D-8T
R4D-8 converted as crew trainers, redesignated TC-117D in 1962

R4D-8Z
R4D-8 converted as a staff transport, redesignated VC-117D in 1962

Sources:
Wikipedia