Weird engines

[Peter C]

I’ll start with this bad boy.

Two pistons but one conrod.

Weird.

Got any more?

First person to post a Deltic motor wins a hot date with me.

 

[RayMK]

4 pistons, 2 conrods (each V shaped, supporting two pistons, the V flexing slightly per stroke because of the geometry), 2 crankshaft throws, 2 combustion chambers and 2 stroke.  Trojans were reliable and quite a few were made.

 

[lesapandre]

Leyland 500 fixed head diesel engine:

https://www.aronline.co.uk/commercials/essays-the-500-series-diesel-leyland-loses-its-head/#:~:text=With the engine having no,a camshaft%2C tappets or pushrods.

[sierraman]

A timing belt that HAS to run in oil. 

[RayMK]

10 minutes ago, lesapandre said:

Leyland 500 fixed head diesel engine:

https://www.aronline.co.uk/commercials/essays-the-500-series-diesel-leyland-loses-its-head/#:~:text=With the engine having no,a camshaft%2C tappets or pushrods.

Thanks. I was not aware of that one.  

[quicksilver]

Commer TS3. Two-stroke, three cylinders with six horizontally-opposed pistons driving a single crankshaft and a big supercharger. Known for its distinctive knocking sound and clouds of blue smoke.

[MrBiscuits]

Yeah, the commer 'knocker' is pretty weird.

[MrBiscuits]

I think everyone knows the deltic, but I never knew the yanks put it into a fire engine (and then called it a super pumper)

https://www.curbsideclassic.com/blog/trucks-and-heavy-equipment/fireground-classic-1965-mack-superpumper-big-water-from-the-napier-deltic-diesel/

[Zelandeth]

4 minutes ago, MrBiscuits said:

Yeah, the commer 'knocker' is pretty weird.

Big brother of that is the Leyland L60.  

Which while problematic in the field, still sounds bloody awesome.

Or bolt three of the buggers together in a triangle, scale it up a bunch and you have the Deltic.

[83C]

Honda’s NR engines:

Oval pistons and 8 valves per cylinder.

[Pieman]

9 minutes ago, MrBiscuits said:

I think everyone knows the deltic, but I never knew the yanks put it into a fire engine (and then called it a super pumper)

https://www.curbsideclassic.com/blog/trucks-and-heavy-equipment/fireground-classic-1965-mack-superpumper-big-water-from-the-napier-deltic-diesel/

That's fucking incredible.  That NEEDS to be put on display in New York somewhere.

[Peter C]

17 minutes ago, 83C said:

 

8 valves per cylinder

Madness. They must be tiny!

[Zelandeth]

I guess by modern standards Rover's IoE engines are pretty strange.  An answer to how to fit Big valves into engines with tiny bores (hold over from how road tax was calculated in the early days meant that narrow bore, long stroke engines were common back then).

Plenty of folks made inlet-over-exhaust engines back around then - but I think Rover's implementation is probably one of the most polished.

It's strange seeing one of these with the head off and realising that the valves aren't all that much smaller than the bore.

It is uncanny how smoothly they can run.

[goosey]

52 minutes ago, quicksilver said:

Commer TS3. Two-stroke, three cylinders with six horizontally-opposed pistons driving a single crankshaft and a big supercharger. Known for its distinctive knocking sound and clouds of blue smoke.

Wife’s Grandfather told me years ago they had a fleet of these back in the day and when took to their limit on the motorway they would shoot blue flames from the exhaust 

[RayMK]

Narrow angle V engines:  Lancia were the first to go into production with these pre WW2 and continued with the concept into the 1970s.  VW have much more recently used the same idea in their VR4 and VR5 engines.  Definitely a bit weird - a V engine with one cylinder head covering both banks. 

[RayMK]

Similarly weird but much, much busier even without showing the valves: W16.

[goosey]

Wankel Rotary Engine 

[goosey]

Tatra Air Cooled V8s 

[lesapandre]

Austin gas turbine car engine. Separately developed from the Rover one.

http://www.austinmemories.com/styled-27/index.html

[Dyslexic Viking]

Tatra  air cooled V12 diesel

[rusty_vw_man]

Mild compared to some of these, but the corvair flat six air cooled is a bit odd:

Lightweight aluminium engine, with a crackers fan belt arrangement.

One thing that seems odd to me is that it was quite out of step with American motors of the time and seemed a very complex solution to a problem that may not have existed…. 

[comfortablynumb]

1 hour ago, 83C said:

Honda’s NR engines:

Oval pistons and 8 valves per cylinder.

Is that the one with the 8mm stroke? I was looking for that one but couldn't find it 

[Surface Rust]

22 minutes ago, rusty_vw_man said:

Mild compared to some of these, but the corvair flat six air cooled is a bit odd:

Lightweight aluminium engine, with a crackers fan belt arrangement.

One thing that seems odd to me is that it was quite out of step with American motors of the time and seemed a very complex solution to a problem that may not have existed…. 

This is the engine the DS should have had!

Must have been some sort of space time continuum wrinkle where the design materialised at Chevrolet instead of Citroen.

[Asimo]

The Corvair engine is dead simple, think 1.5 Beetle engines!

Anyway, Ducatis with Desmodronic valve gear are, interesting.

https://www.bluming.com/projects/desmo.htm

Tap it, you need to see the animation.

[MiniMinorMk3]

Aerial Square 4

[MiniMinorMk3]

Volkswagen VR5

[Alan G]

The Napier Nomad, part gas turbine and part diesel. Hideously complex and never worked properly.

[Asimo]

 

The VM Diesels, as found in Alfa33, Alfa Six, Jeep Grand and ordinary Cherokee, Granada, Rovers etc, etc..

No main-bearing caps. Crankshaft, together with it's main bearings in big round alloy holders, slides in from one end.

[Alan G]

Another aeronautical disaster, the Rolls Royce Vulture. This was an X24 and proved to be utterly unreliable. This was the engine that powered the RAF's new heavy bomber, the twin engined Avro Manchester. Avro ended up redesigning the aircraft to use four Rolls Royce Merlins - the famous Lancaster bomber.   

[High Jetter]

Great thread, @Peter C

My contribution is the Kinght Sleeve Vale, ear;y C20: