Interesting - perhaps the CC was engraved by hand? I doubt it could be milled because the ends of the lines forming the Cs are square. It would be interesting to see more plates.
"On this topic I already shown that the Beaulieu engine is machined to be in front of the axle." I guess I don't understand this comment. The Ariel tricycle in the Beaulieu museum has an Ariel motor behind the rear axle, and to do this, the drive must come from the side of the motor opposite the exhaust pipe - i.e. the opposite side to the later Ariel trikes (engine in front of axle). Can you tell me which post you're referring to? I don't understand what you mean by "machined to be in front of the axle".
Re the motorcycle with the Ariel tricycle engine. There are two photos of this bike at the Motoring Picture Library at Beaulieu:http://www.motoringpicturelibrary.com/d ... 96x569.jpg
andhttp://www.motoringpicturelibrary.com/d ... 96x300.jpg
The motor in this bike is similar (but not identical) to the Beaulieu Museum tricycle: it has the drive from the "wrong" side, but it has the contact breaker in the same position as your in-front-of-the-axle engine. I'd guess that this bike has been built at a later date using a tricycle motor. The frame parts are possibly Chater Lea rather than Ariel - at least the front fork is Chater Lea style rather than Components style. From the style, I'd guess a build date of 1904-5. Note the huge (tricycle size!) ignition coil on the seat tube of the frame.
I don't think I'm testing all the proof you are bringing in - rather I'm trying to understand whether the tricycle that arrived here in March 1898 (brought in by the Ariel/Dunlop agent, and called an Ariel (former Dunlop) in the period press reports) was in fact an Ariel. I have shown you a photo, from a 1909 Australian magazine, where the machine is called an Ariel by the man who rode it in 1898. I've yet to see even one dot of proof that Ariel built an "engine in front of the axle" tricycle by this date. In fact from the patent record, British Show reports in Newspapers etc. it seems very unlikely.
"The photo's in the library on this site are of the first Dunlop-CC tricycle, try to shoot a hole in that." Sorry I can't find where it says that - can you point me to it? As I've commented before, there is no date on this brochure, so it may be the first brochure for this type of machine, but from the patent etc. I suspect it must have been printed in the last quarter of 1898.
Now my time line (which I'm sticking to as it makes sense to me, if not to you!) would suggest that prototypes of the "CC de Dion" engined Ariel tricycle with the engine in front of the axle would not have appeared until well in to 1898 - probably June or so (the patent was filed in September). You seem convinced that your engine dates to some time before August 1897. The Australian Ariel tricycle (de Dion pattern, with de Dion motor) must have been built at the latest in January 1898. Let me issue a challenge: can anyone provide PROOF (not captions in 1950s books!) that Ariel built a tricycle with their own motor in front of the axle before August 1898 (12 months after the date Adrie claims for his motor?