Oddball engines and prototypes

[WilDun]

Then of course, there is the Paut motor! You could say it's action is loosely based on that of the Karol Ansdale engine, pics of which I posted back on about page 2. (post# 18).
I'm not entirely sure that it actually exists as yet, but this is the best animation of an engine I have ever seen, even if it never turns one revolution this is definitely a work of art - well, a virtual work of art anyway!

http://tech.firstpost.com/watch-vide...UsnKJtMYQ.html

[pete376403]

Heres a MODERN oddball motorcycle

A 1400cc parallel twin 4 conrod twin counter-rotating cranksaft turbo diesel motorbike made by Neander motors

www.youtube.com/watch?v=gL0QyScysQk

One write up i read said it works well if somewhat noisy typical of a diesel motor
It can run on just about any light oil like the diesel motor was originally designed to do.

About the only downside to the design is that the riders will be known as Neanderthals

[WilDun]

This is the Butterworth Valve which really deserves a mention, even though it never went into production, It apparently worked well - definitely leaves a bit more room for the gas to get past.
There may be some other better pictures around.

[Grumph]

Archie Butterworth is better known for doing a flat four motor for i think his own build sports car. It was around 1500cc I think and may have been tried in a F2 Cooper as well. I've seen reports decribing the valve gear noise as audible above the exhaust...
I'd never seen the bike version.

[Flettner]

This is the Butterworth Valve which really deserves a mention, even though it never went into production, It apparently worked well - definitely leaves a bit more room for the gas to get past.
There may be some other better pictures around.

Would it be that much better? You really need to tuck the valve head right out of the way.

[husaberg]

Could work better with a torsion bar valve spring ala cb450....still need to be higher cam mabe with switching lobes vetch or conical cams

[Flettner]

Could work better with a torsion bar valve spring ala cb450....still need to be higher cam mabe with switching lobes vetch or conical cams

Looks to me like valve heads for lunch.

Any way, Husa, I've been in the pattern shed tonight brewing up some more patterns ( well finishing off some ) as I have hatched a new plan.

Gyro still not finished but I did fire it up and spun up the rotor head via the new per rotator system. Might try it again tommorw with the actual rotors on

[husaberg]

Looks to me like valve heads for lunch.

Any way, Husa, I've been in the pattern shed tonight brewing up some more patterns ( well finishing off some ) as I have hatched a new plan.

Gyro still not finished but I did fire it up and spun up the rotor head via the new per rotator system. Might try it again tommorw with the actual rotors on

reciprocating plan?

[WilDun]

Would it be that much better? You really need to tuck the valve head right out of the way.

Obviously wasn't better (didnt catch on) and I would hate to try lapping in the valves!

[WilDun]

Archie Butterworth is better known for doing a flat four motor I've seen reports decribing the valve gear noise as audible above the exhaust...

Yes I could believe that - I can see it also would have a couple of other problems (like munching valve heads as Flettner says)!
Sounds like he was willing to give things a go, but this one didn't make it I guess.

[husaberg]

A bit off track but Neil will I guess know of it.

[unstuck]

That is one cool little plane.

[WilDun]

A bit off track but Neil will I guess know of it.

Yes, really great little plane!
The NZ guy who owns that one (if it is the one I'm thinking of) is/was a 747 pilot, but I think it's either for sale or has been sold recently.

They are very aerobatic and there are quite a few videos on them on the net. (probably from France)

One of them has two tiny turbojets in place of the two stroke engines.




I've really got to get on with my foundry stuff now and have it in full swing by Christmas!

[husaberg]

In its simplest form, the drive utilizes a jointed rhomboid to convert linear work from a reciprocating piston to rotational work. The connecting rod of the piston is rigid as opposed to a common reciprocating engine which directly connects the piston to the crankshaft with a flexible joint in the piston. Instead, the rod connects to one corner of a rhombus. When force is applied to the piston, it pushes down; at the same time, the outer corners of the rhomboid push out. They push on two cranks/flywheels which cause them to rotate, each in opposite directions. As the wheels rotate the rhombus progresses its change of shape from being flattened in the direction of the piston axis at top dead centre to being flattened in the perpendicular direction to the piston axis at bottom dead centre.

A Stirling engine is a heat engine that operates by cyclic compression and expansion of air or other gas (the working fluid) at different temperatures, such that there is a net conversion of heat energy to mechanical work.[1][2] More specifically, the Stirling engine is a closed-cycle regenerative heat engine with a permanently gaseous working fluid. Closed-cycle, in this context, means a thermodynamic system in which the working fluid is permanently contained within the system, and regenerative describes the use of a specific type of internal heat exchanger and thermal store, known as the regenerator. The inclusion of a regenerator differentiates the Stirling engine from other closed cycle hot air engines.

Originally conceived in 1816 as an industrial prime mover to rival the steam engine, its practical use was largely confined to low-power domestic applications for over a century.[3]

The Stirling engine is noted for high efficiency compared to steam engines,[4] quiet operation, and its ability to use almost any heat source. The heat energy source is generated external to the Stirling engine rather than by internal combustion as with the otto cycle or diesel cycle engines. Because the Stirling engine is compatible with alternative and renewable energy sources it could become increasingly significant as the price of conventional fuels rises, and also in light of concerns such as peak oil and climate change. This engine is currently exciting interest as the core component of micro combined heat and power (CHP) units, in which it is more efficient and safer than a comparable steam engine

http://en.wikipedia.org/wiki/Stirling_engine







I remember this from the stuff I posted on the foundry thread, never seen the complete engine though.

[nodrog:Me]

Hows my 1000cc horizontally oposed bmw boxer 2 stroke coming along?