British online friend: "Saw a flying banana tonight. I only noticed because of the purple light shining upwards"

Everyone: ???

"We have track measurement trains. They run around, checking the tracks for faults, the power cables, etc

They're bright yellow. So they're nicknamed the Flying Banana, as a joke on the Flying Scotsman

Night time they have this blue laser that scans the overhead wires. It creates this giant glow you can see when it moves"

@GreenSkyOverMe

That is going to cause UFO reports 😆

@GreenSkyOverMe the flying banana is actually only one of the multiple test trains we have in the UK!

There's iirc something like 6 or 8 HST power cars used, but the actual consists they run with are not consistent, and often you'll see them run with a Class 37 and a DBSO (oldddd cab car)

@GreenSkyOverMe in fact, looking at the schedules I have available (on a paid-for forum) there's 4 test trains scheduled to run today

One from Leicester via London Euston then back to Leicester, one from Mossend to Mossend via the Glasgow suburban lines (Mossend being a large freight yard just outside of Glasgow)
Rugby to Derby
Derby to Cambridge (this one is running with a 37)

@ic5146 @GreenSkyOverMe Leicester-London Euston seems a strange routing. The usual terminus for Leicester services is St Pancras.
@GreenSkyOverMe are you ready for an hour long video on them, from a current rail engineer? https://www.youtube.com/watch?v=dKWpXNc0g1E
This train TRANSFORMED Britain’s railways | #Railnatter 302

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I feel a childlike joy seeing the flying 🍌
@GreenSkyOverMe I did not know about the blue laser! I’m going to have to keep an eye out for that - sometimes it lays over at a yard near me.

@GreenSkyOverMe Japan has 'Doctor Yellow' for their maintenance train.

Flying Banana was used as a nickname for all the high speed train units in their original livery long before the NMT, and that was a reference to 1930s use for GWR railcars

@GreenSkyOverMe Funny!

Personally, I call the black-and-yellow service trains I have in my Minecraft world "bees". Called the last one "Andrena" (mining bee) because it's a driller train, haha

@GreenSkyOverMe They always remind me of this scene in Dr Zhicago because of how they arrive unannounced at small stations going line speed and surprise everyone.

https://youtu.be/wRXKHTTzayU

Il treno di Strelnikov - Strelnikov's train - Il Dottor Zivago

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@chiffchaff @GreenSkyOverMe Dr Zhicago - what a wonderful typo. Please don’t correct it.
@allypally @chiffchaff @GreenSkyOverMe The same story just with a lot more jazz.
@allypally @GreenSkyOverMe Ha! I won't. I wanna see Dr Zhicago now!
@GreenSkyOverMe Leaned something knew. Goooo flying bananas!
@GreenSkyOverMe
I didn't know about this and now I do . Thank you
@GreenSkyOverMe @nigecube Did you know about this? :-)
@lopta @GreenSkyOverMe the banana, yes. The light, no...
@GreenSkyOverMe video for the curious (not the one from BBC News as in the screen caps, I couldn't find that) https://youtu.be/BVa0TR7YByc
Network Rail "Flying Banana" New Measurement Train - Lunan 11/10/2022

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@GreenSkyOverMe i want one of these
mx [@tay, @GreenSkyOverMe], now this one wants a giant blue laser glow,,
@GreenSkyOverMe the measure and maintenance trains on the Tokaido and Sanyo Shinkansen lines are similar; they're named "Doctor Yellow" :D
@GreenSkyOverMe why is it so long?
@qwazix Not sure, maybe this video someone else linked explains it, I haven't watched it https://youtu.be/BVa0TR7YByc
Network Rail "Flying Banana" New Measurement Train - Lunan 11/10/2022

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@GreenSkyOverMe clearly the purple light is the bat signal, but for train nerds
@GreenSkyOverMe Well that’s interesting. I’ve seen it multiple times in several mainline station sidings and wondered what it measures. As a regular rail user, am grateful for its yellow/blue work.
@GreenSkyOverMe I first thought you were talking about the original Flying Banana, the Piasecki/Boeing Vertol H-21 helicopter! Shame they didn’t have blue lasers…
@GreenSkyOverMe It's funny to think that the vehicle that tests the overhead lines... runs on diesel traction :D Obviously it's more versatile that way for a largely unelectrified network in the UK, and Deutsche Bahn also use the diesel BR 605 for testing, so hardly unprecedented. But lovely to see the old British Rail class 43s still in use in one way or another all the same!
@GreenSkyOverMe Hmm, wouldn’t this make plane pilot mad ?
@GreenSkyOverMe This is a rabbit hole I am more than happy to enter.

@GreenSkyOverMe

I bet those play well with the Aviation Authorities, or whatever they call it over there.

@GreenSkyOverMe Wow, that is some incredible light pollution... Why is its intensity set so high? (I know I'm focusing on the wrong thing here, but geez...)
@GreenSkyOverMe
Didn't realise people called them that!
@GreenSkyOverMe reminds me of how the sacramento kings' arena installed a "beam" that lights up every time the team wins a game

https://en.wikipedia.org/wiki/Light_the_Beam#%22Light_the_Beam!%22_and_2022%E2%80%9323_season
Light the Beam - Wikipedia

@GreenSkyOverMe Are you sure the aliens aren't invading the UK's transport sector?