Originally Posted by
DaveReidUK
Despite not having block numbers, the 16 EC-130Qs built for the TACAMO mission (plus two conversions from KC-130Ts) were delivered in 3 separate batches, with differences in spec.
The last five aircraft, including the two that ended up with Coulson, were lighter and had improved pressurisation and ECS. It seems likely that they were built with blanked-off chin windows.
Thank you Dave, that answered my curiosity, another subtlety to the myriad of configurations and special fits to the C-130 family.