Voitures Anciennes

[DominicBest]

Let’s not forget these.
https://www.google.com/gasearch?q=rover ... qm2xw,st:0

[Nomoss]

I do not agree with that statement. The dynamic forces acting on the liquid piston seals are much less than in the wankel engine and less even than on piston rings of a normal IC engine. In the first place they are not subjected to centrifugal forces at all nor reciprocating dynamics apart from limited spring action behind the seal.

Agreed the peripheral seals are not subject to centrifugal forces, but this simply means they require stronger springs to maintain contact with the stator/housing, and will still be subject to sliding wear with limited lubrication.
The only reciprocating forces on those seals on both engines, which perform the same function, are due to deviation from true trochoidal geometry due to manufacturing tolerances or heat.
Chatter marks on the periphery of the stator were NSU's biggest problem, which could reappear as chatter marks on the rotor surface for the LP engines.
The LP's one piece lateral seals are a brilliant innovation, apart from the current manufacturing method, but I'm sure they can be made using precision casting in the future.

[Nomoss]

The three suspects. (© Photo NSU-Pressemappe 1971) The first generation of Wankel engines didn't have a rev limiter. Because of the smooth running over-revving was very easy, down hill on the Autobahn, no disturbing sounds from under the bonnet. City traffic, low speeds, high gear and delivering power: also not good. New materials made their entry, Mazda's guarantee for their Wankel engines: 100,000 miles.

And more maintenance problems (from: Autobild.de).

" Another source of error is the NSU workshops, which are overwhelmed by the revolutionary rotating technology. A few years previously, many of them were still working on Prima scooters and Quickly mopeds. Now, if a customer comes in and reports major problems, they remove the engine and send it back to the factory. In this way, the NSU engineers want to track down the possible weaknesses more quickly. And then they realise that more than half of all engines are in order and can leave the factory again after a few adjustments. Many Ro-80 drivers didn't find this funny at the time. Another source of trouble is the ignition. It is complicated to adjust and prone to wear. For this reason, from autumn 1969 NSU fitted a high-voltage capacitor ignition instead of the conventional coil ignition with its highly stressed breaker contacts, which was easier to adjust and whose contacts lasted much longer. Connoisseurs like club expert Christian von Klösterlein know this: Apart from the initially bitchy engine, the Ro 80s were amazingly sophisticated. "

My first two Ro80's didn't have a rev limiter, but I instinctively didn't often run at over 6.000 rpm. W hen it first sounded, a terrifying screech, in second gear, on my third, I nearly sh@t myself.

The incompetence of the people at the NSU agents was unbelievable. I drove into one in France and saw the mechanic run off and hide. The boss said he was not there. This was probably the main reason for their demise.

My Oct 1968 Ro80 had CD ignition, but it used conventional contact breaker points and was quite simple to adjust with the correct tools. The points lasted longer due to the smaller current carried by them.

[Nomoss]

I think the Liquid Piston engine may have a chance as a light weight power source for drones and so on, but for the automotive market they are up against stronger opposition.

[RobertArthur]

Or back to a proven technology, a V8 and get your kicks on Route 66.

[Hotrodder]

[RobertArthur]

There is definitely something going on between this photographer and classic cars.... Let's meet at the Timber Bar.

What else stands out: some young ladies and their priceless cars are well guarded.

Maddox Gallery London.

[RobertArthur]

The NSU Ro80 also as cabrio. The complete article by CLB.

[Nomoss]

Also as a 6-wheeled pickup, to transport his drag bikes, by Eamon Hurley.
https://books.google.fr/books?id=dmZfAm ... 80&f=false

He started selling Ro80 piston engine conversions in the late 1970's, then Mazda rotary engine conversions, rebuilt NSU and other rotary engines, and sold me the modified Mazda 13B engine I fitted into my last Ro80.
https://hurleyrotary.com/

[Polarengineer]

Another outfit playing with rotary engines in a big way.
https://pulseperformance.co.nz/