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Awesome eengineering

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Laverda Dave:
A very unique sound. What are they going to do with an engine that size, got to go into a boat?

Laverdaroo:
I reckon so or some silly yank tank pick up something. Awesome platform though as I suppose you could have it as big as you can fit in the hole you’ve got to fill. Bit like a cartridge engine, you can just bob another set in or take one out. The tuning element is interesting re the advance retard mech. Super clever.


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Matt_Harrington:

--- Quote from: McCabe-Thiele (Ted) on May 03, 2023, 11:49:46 AM ---When I was in the motor trade back in the early 1970's I used to sell the new NSU RO80 - the later two plug engines fitted with the catalytic converter were much better plus they had the built in rev limiter to stop the rotor tips wearing out too fast - both were twin rotor design early ones had 4 plugs.

They were suited to folk who used them on motorways regularly - they were rated for VEL duty as 2 litre but in reality they were iirc nearer 490 cc each. We had a customer who covered close to 80k miles a year commuting between Birmingham, London & Blackpool - he was a great fan having owned both versions. 20 mpg was pretty much average as they wanted to be driven.

If just used for short commuting they would stall at idle during a journey then refuse to start for a couple of hours due to wet plug fouling.

--- End quote ---

Hailing from Blackpool (well someone has to!) My mates dad had an RO80 and I thought it a fantastic engine (and the semi auto clutch)....

McCabe-Thiele (Ted):
They were well ahead of their time. A favourite trick used to be driving on an empty section of dual carriageway A38 at 70 mph then do a heads free emergency type stop down to 20 mph. They pulled up dead straight due to the steering geometry we called it inboard scrub radius.iirc.

K2-K6:

--- Quote from: Laverdaroo on May 04, 2023, 10:10:51 PM ---I reckon so or some silly yank tank pick up something. Awesome platform though as I suppose you could have it as big as you can fit in the hole you’ve got to fill. Bit like a cartridge engine, you can just bob another set in or take one out. The tuning element is interesting re the advance retard mech. Super clever.


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--- End quote ---

Yep, the builder said to be same size as big block V8 to fit existing space in boat inboard location.  He built it to be more reliable than the Chevy at continuous running high output with less maintenance for valve springs etc.
Quoted 800 ft/lbs torque at 2000 rpm  :) that'd turn a fair size prop with not even much rotor speed being used.

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