Why did mk1 GSVs have air brake through piping?

[murphaph]

I note that most but not all of these vehicles had through piping for air brakes.

Was this just a legacy of their BR days or something or why did they need that, seeing as the Cravens were vacuum braked?

[Mayner]

Some BR vans & TPO stock were fitted with through pipes for working with the air braked 62'9" container flats on the Galway Liner Mail & possibly the Cork Night Mail. 

The Dublin-Galway Night Mail and North Wall-Galway Liner was combined into a single Liner Mail in the late 80s when the mail lost its passenger accommodation until mail trains ceased to operate in the early 1990s.

The 62'9" wagons were converted to carry timber traffic in the mid 1990s, Galway Liner traffic was carried on an out and back trip working from Galway that connected into the North Wall-Claremorris Liner at Athlone.

[murphaph]

Fascinating stuff. Thanks John.

 

Phil

[Niles]

I know of the extant ones in Ireland, Downpatrick's 3189 is dualbraked... the RPSI pair are vac only as is the weedspray one *I think*.

[josefstadt]

4 hours ago, Niles said:

I know of the extant ones in Ireland, Downpatrick's 3189 is dualbraked... the RPSI pair are vac only as is the weedspray one *I think*.

The vans were only vacuum braked, not dual braked. The through pipes connected the loco to the air brakes on the wagons, running along the outside of the underframe. The vans were, if I remember correctly, T.L.A.

[K801]

Was it also so GSVs could be attached to Mk2Ds? 

[Niles]

2 hours ago, josefstadt said:

The vans were only vacuum braked, not dual braked. The through pipes connected the loco to the air brakes on the wagons, running along the outside of the underframe. The vans were, if I remember correctly, T.L.A.

ah yes... my brain wasn't engaged phrasing that earlier!

[BSGSV]

20 hours ago, K801 said:

Was it also so GSVs could be attached to Mk2Ds? 

No. The MK2AC stock was vac braked like the BR Vans.

[murphaph]

I believe the mk2d stock was vacuum braked as it was ordered new from brel and it could be specified like that to maintain compatibility with the loco fleet of the time.

The mk2ac stock was bought second hand and was air braked.