[Enginetuner]

Similar as

The Bishop rotary valve engine
http://home.people.net.au/~mrbdesign...utoTechBRV.pdf

[JayDee80]

That's right!

If someone is interested in the Bishop rotary valve, I would recommend looking for Glen Horrocks' dissertation "A Numerical Study of a Rotary Valve Internal Combustion Engine", European patent EP1792058B1 and, for example, US patents US7401587, US7458357. US7621249 and US7694656.

For general information about rotary valves, an "oldie but goldie" is Hunter's "Rotary Valve Engines".

But I don't want to be off topic here, I am still interested in news from the thread starter.

[D.L]

Jaydee80, that is comprehensive. I stumbled across a story of an Aussie guy who built sidecars in Adelaide in a vintage bike mag.
Rex Tillbrook, he built a racing motorbike with twin rotary valves, BUT! No patents lodged, he had been previously fooling with disc valve 2 strokes.
I am suspecting Rex's twin valve motor was 2 discs, rather rotating shafts, 2 discs side by side with an included angle of about 30 to 35 degrees.
No patents or technical papers published, just photos of the outer motor.
He had good sealing and lubrication, apparently he built the prototype, rode it and then shelved it due to power concerns.
Friction, I'm guessing was it's achilles heel.

This is my favourite variation;
http://www.villiers.info/Aspin/AspinEssay/essay.htm

[Melisa Stewart]

It seems really a nice thread and from those charts I merely come to know that the port opening oscillates rather then rotates, otherwise those pressure readings would be more of a uniform and a radius wave form.

[RICHARD ZASTROW]

D.L, You might be interested in the rotary valved Rotax 2-strokers. They used a lot of disk type rotary valves, probably still do.

Rotax is part of Bombardier Recreational Products, (BRP). They used the rotary valved engines in Ski-Doo snowmobiles, CanAm cycles and early ultra-light aircraft. Others modified the snowmobile engines for ultra-light use.

I raced the Rotax engines in snowmobiles, lotsa power for a small package. The 340cc naturally aspirated carbureted race engine on 100 octane gasoline produced 115hp.

This is a two cylinder engine with one rotary valve covering both intake ports. It was (is) driven by a pair of 45 deg. helical gears to produce a 90 deg. 1:1 shaft. The rotary valve rotates between the carbs and the intake ports. Very compact.

Dick Z

[Enginetuner]

Four stroke rotary valve engines

F1 engine MGN W12 with rotary valves. F1 Motor mit Drehsch
F1 engine MGN W12 with rotary valves. F1 Motor mit Drehschieberinlass - YouTube

Mark Walker
MWV2: Concept Motorcycles by Mark Walker
http://thekneeslider.com/mark-walker...rom-australia/
BIG NED - The Ultimate Street Fighter - Story
http://www.mwv2.com/creating-big-ned.html


v8 rotary valve engine australian built
v8 rotary valve engine australian built - YouTube
OUR ROTARY VALVE V8 engine . with pics
OUR ROTARY VALVE V8 engine . with pics - Yellow Bullet Forums

[Zenji]

That V8 started to seize before they cut off the ignition.

[elmerfud]

good old bishop!