Hornby Railroad R3395TTS Mallard LNER Class A4 with sound N Track & Accesories and the Trop version's air

and the Trop version's air intake with sand filter

The streamlining of the A4s' steam circuit

Italeri B-52G Early With Hound Dog 1:72

Once built

and these locos had an additional compressor and associated pipework

Hornby Railroad R3395TTS Mallard LNER Class A4 with sound N Track & Accesories and the Trop version's airProbably the most iconic Pacific Express design of locomotive in Great Britain, the LNER Gresley A4, with its streamlined casing, was a classic symbol of the attitude towards speed and design in the 1930s. The 1930s saw increased competition to the railways from road and air travel and the LNER Board knew that they had to make travel between the major cities faster, more comfortable and more reliable. High speed diesel services were starting to make