Deltics



Stevie Freestein II said:
Deltics.

They were advanced at the time in triangular shape (Delta, should really have been called Nabla), 3 pistons in a triangular setup IIRC.
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Three cylinders in each bank, six pistons, opposed to each other, no cylinder head. 18 pistons per engine, two engines, two stroke diesel. Developed by Napier for navy speed boats also found in a German aeroplane. Engines were often changed twice in a year due to their intensive use. Noisy, very very noisyand they often threw a piston through the roof. Transformed railway speeds 100+ became the norm.
 
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yorkyexile said:
Admittedly the damaged hearing eh? works better as a joke in person rather than on a message board
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Eh? Speak up daftie.

redgauntlet said:
Three cylinders in each bank, six pistons, opposed to each other, no cylinder head. 18 pistons per engine, two engines, two stroke diesel. Developed by Napier for navy speed boats also found in a German aeroplane. Engines were often changed twice in a year due to their intensive use. Noisy, very very noisyand they often threw a piston through the roof. Transformed railway speeds 100+ became the norm.
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Thank you. I watched a very good documentary re: Diesel engines and the Deltic was shown.
 
redgauntlet said:
Three cylinders in each bank, six pistons, opposed to each other, no cylinder head. 18 pistons per engine, two engines, two stroke diesel. Developed by Napier for navy speed boats also found in a German aeroplane. Engines were often changed twice in a year due to their intensive use. Noisy, very very noisyand they often threw a piston through the roof. Transformed railway speeds 100+ became the norm.
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so how was the fuel compressed if there was no cylinder head?
 
The Deltics were the most powerful single unit diesel locos in the world. Good power to weight ratio, 3,300hp and 98 tons. The wheels were found to spin at speeds of over 90 mph, six wheels per bogie. Wheel slip sensors cured the problem. They (Engkish Ekectric) built a smaller version with one engine for London suburban services but they were not a success.

yorkyexile said:
so how was the fuel compressed if there was no cylinder head?
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The cylinders opposed each other moving together which created the compression, two opposed pistons per cylinder, six in each bank of cylinders in truangular form, hence the word Deltic from the Greek delta but as the truangke was upside down it should have been the Greek symbol nablic. Six banks of pistons per engine 18 pistons two engines. Weaknesses in phasing gears that kept everything in sync and steam heating boilers could be a pain.
 
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redgauntlet said:
The Deltics were the most powerful single unit diesel locos in the world. Good power to weight ratio, 3,300hp and 98 tons. The wheels were found to spin at speeds of over 90 mph, six wheels per bogie. Wheel slip sensors cured the problem. They (Engkish Ekectric) built a smaller version with one engine for London suburban services but they were not a success.


The cylinders opposed each other moving together which created the compression, two opposed pistons per cylinder, six in each bank of cylinders in truangular form, hence the word Deltic from the Greek delta but as the truangke was upside down it should have been the Greek symbol nablic. Six banks of pistons per engine 18 pistons two engines. Weaknesses in phasing gears that kept everything in sync and steam heating boilers could be a pain.
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Did you work for British Rail? My dad served some of his apprenticeship at Philli yard I think, did they do rail maintenance there or was it colliery engineering?
 
Best locomotives ever built , Cl 52 Westerns 2nd and Class 40s third , Myyy Looordz!!! Classed the lot of them back in the day and had haulages off most. Appropriate for today , one I never managed a haulage off was 55001 St Paddy. Still a member of the Deltic Preservation Society as well.
 
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