Rex Tingley Valveless design

[Jon LawesParticipant @jonlawes51698]

Whilst idly browsing the internet I found mention of Rex Tingley's Valveless design of locomotive.

Sugar

I can't find mention of how he achieved this "valveless" operation. Can anyone enlighten me please?

[Jon LawesParticipant @jonlawes51698]

[ZanParticipant @zan]

He did a series in model engineer a long while back. It was for his stationary, then the loco

[nigel jones 5Participant @nigeljones5]

anyone got anything on this – looks interesting

[WearyParticipant @weary]

The principle of method of functioning is that the piston runs within an inner cylinder which itself slides back and forth within an outer cylinder. The inner cylinder has ports drilled in it which at certain positions of travel line-up with ports in the outer cylinder.

The inner cylinder position relative to the outer cylinder is changed by the piston sliding back and forth as the travel of the piston is longer than the length of the inner cylinder.

To call the engine 'valveless' is misleading (I suggest) as it is actually a sleeve-valve engine with the movement of the sleeve driven by the piston travel at each end of the stroke.

Regards,

Phil

Edited By Weary on 22/04/2021 21:22:29

Edited By Weary on 22/04/2021 21:22:58

Edited By Weary on 22/04/2021 21:51:00

[Jon LawesParticipant @jonlawes51698]

Ah, thats cunning. Thank you

[Oily RagParticipant @oilyrag]

Ahh Yes – a sleeve valve indeed. Wonderful engines, smooth, quiet, and surprisingly efficient. We looked long and hard at a sleeve valve system for a F1 engine – but then the regulations banned anything other than poppet valves.

Martin

[Ady1Participant @ady1]

I have put the build in here

Looks like a fab beginner loco

The last page is a frames issue correction

[Jon LawesParticipant @jonlawes51698]

Thank you

[Author]

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