Talk:Stoneblower

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This seems to be out of date and Network Rail now has three stoneblowers in operation: https://www.networkrail.co.uk/running-the-railway/looking-after-the-railway/fleet-machines-vehicles/track-treatment/ — Preceding unsigned comment added by 81.149.45.14 (talk) 14:53, 28 August 2018 (UTC)[reply]

Time scale

When did the PBI'84 experiments take place? The fact it used a PDP-11 constrains it to between 1970 and 1997 (the latter range is very unlikely), but I suppose the "84" is a clue... Hairy Dude (talk) 06:57, 9 February 2019 (UTC)[reply]