What you have now is a Civilian freight version adapted for use, what the original Military version called the STA had for unloading and loading was this contraption that it carried onboard and had to be assembled to offload your vehicles, not exactly roll on roll off.
As shown at Farnborough.
and Paris below
it had no takers.
BAe 146STA[edit source | editbeta]
Throughout the production life of the BAe 146, British Aerospace proposed a number of specialised military versions, including side- and rear-loading transports, an
airborne tanker version,
[47] and a
carrier onboard delivery version.
[48] Out of these proposals the BAe 146STA (Sideloading Tactical Airlifter), based on the BAe 146QT cargo aircraft and sharing the same cargo door on the left side of the rear fuselage, was produced. This military transport version has a refuelling probe protruding from the nose; a demonstrator, fitted with a dummy refuelling probe and an air-openable paratroop door was displayed at the 1989
Paris Air Show and carried out extensive demonstration tours, but no orders resulted.
[49]
from Wiki, though to be fair for the role it is in today, it wouldn't have needed the ramp.
I still think the UK government messed up when we bought the Andover over the Heralds, they were modified to have a Herc type back end and thats what the 146 should have had.
Could you imagine a Bae 146 Carrier ONBOARD delivery system.... i'm still laughing now over 30 years later.