The reason I asked was because the U-2S/R are very different from the U-2A/B, approx. 30% larger, yet - both are listed with the same wingspa which in the very list imply different scale. Without seeing a picture, neither me nor anybody else interested in the U-2 can decide if the 2S/R is "scale enough".

Josh

That is as neboulous answer to my question as it can get. I will have to wait until the fog of battle clears, I guess.

Initial production, single-seat; Pratt & Whitney J57-P-37A engine; 48 built

U-2B

Proposed missile warning patrol aircraft; not built.[189]

U-2C

Enhanced single-seat model with Pratt & Whitney J75-P-13 engine and modified engine intakes

U-2D

2 seat used for various IR detection programs, not a trainer aircraft.[citation needed]

U-2E

Aerial refueling capable, J57-powered

U-2F

Aerial refueling capable, J75-powered

U-2G

C-models modified with reinforced landing gear, added arresting hook, and lift dump spoilers on the wings for U.S. Navy carrier operations; three converted

U-2H

Aircraft carrier capable, aerial refueling capable

U-2R

Re-designed airframes enlarged nearly 30 percent with underwing pods and increased fuel capacity; 14 built

Proposed U.S. Navy maritime surveillance R-model; two built

U-2S

U-2SR (TR)

Cheers

Josh

Jack Bale's DEHAVILLAND DH 108 "SWALLOW" has been found in a basement hiding place it was placed for safe keeping... This plan and documentation resources will be available in five days. 

Ed