Oddball engines and prototypes

[Pursang]

Fireproof, pressureproof, detonationproof reeds that open at the slightest pressure differential, and with so little mass that they'll allow any rpm...
Did you try talking to Santa about it?

Santa said, "Be a good little Poppet..... 'cos until you get yourself off the Naughty List, you're getting S..t!":

Cheers, Daryl

[WilDun]

Santa said, "Be a good little Poppet..... 'cos until you get yourself off the Naughty List, you're getting S..t!":

Cheers, Daryl

At least you got a civil reply! - any time I mention poppets to the 2T boys , all I get is a terse F**K OFF NODDY

(BTW, even Santa has gone 4T as well)

[Pursang]

.
Preliminary calculations on the cam-less valves suggest that 28mm diam. Ti valves of 24g with 50kpa of boost will produce 7mm of lift in 90 deg. up to 2500rpm.....IF....
Blowdown can reduce cylinder pressure to Zero or below. (Absolutely Zero)..and the differential be maintained during intake.
(About the same sort of revs where they stopped using atmospheric intakes, around 100 years ago)

The Camshaft LIVES!..

Cheers, Daryl.

[Pursang]

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Direct Injection is off My table at present.

Lack of small compact pumps to provide 200bar is an issue.

The best that Honda can do is this Patent:

Sticking, what looks like, an automotive sized, Bosch DI pump on top of an engine.

Boldly developing New and Exciting Advanced Technology for (maybe sometime in) the Future!!!
Or at least to stop anyone else from trying! (A Honda uniflow 2-Stroke patent pdf is attached)

Cheers, Daryl

[Pursang]

F**K OFF NODDY

Fortunately, this is the Oddball engine thread!

The Noddy bike lasted as long as the BSA Bantam!

cheers, Daryl

[husaberg]

Fortunately, this is the Oddball engine thread!

The Noddy bike lasted as long as the BSA Bantam!

cheers, Daryl

I was reading about rhe LE velo last night it turns out they weree called a noddy bike as the rider was meant to salute other police officers when mounted it turned out due to the hand-shift on the velo most of the time he could not so they allowed then to nod which started of the nickman noddy bike. sounded plausable.
the orifial carb had something like 7 seperate jets in it.
from memory it was 100 pound dearer then a bantam and about 100lb heavier.

[WilDun]

I was reading about rhe LE velo last night it turns out they weree called a noddy bike as the rider was meant to salute other police officers when mounted it turned out due to the hand-shift on the velo most of the time he could not so they allowed then to nod which started of the nickman noddy bike. sounded plausable.
the orifial carb had something like 7 seperate jets in it.
from memory it was 100 pound dearer then a bantam and about 100lb heavier.

The LE Velocette was a unique bike but not exactly a ball of fire - good for pottering about on but as far as I was concerned there was not a racing part in it, (except the front forks, often used in specials) - the good old Bantams and Tiger Cubs could be turned into great little speed machines.

Velocette also made a scooter called the Viceroy which had a 250cc two stroke boxer twin engine mounted up front, just behind the front wheel - looked like it might be good, but by that time Velocette were on the slippery slope ....

Triumph also made a scooter called the Tigress which used the four stroke 250cc parallel twin engine originally designed for the Sunbeam motorcycle which was aimed (unsuccessfully) at the American market. - The Tigress was actually a good scooter, it had unusual front forks (resembling conventional forks with twin legs) but which were turned through 90 deg. making it a unique one sided setup and easy to remove the front wheel - It actually handled better than many motorcycles of the day! (I owned one for a short time).

Might try and dig up some info on all these machines, unless Husa beats me to it of course ........ Husa - you there?

[husaberg]

The LE Velocette was a unique bike but not exactly a ball of fire - good for pottering about on but as far as I was concerned there was not a racing part in it, (except the front forks, often used in specials) - the good old Bantams and Tiger Cubs could be turned into great little speed machines.

Velocette also made a scooter called the Viceroy which had a 250cc two stroke boxer twin engine - looked like it might be good, but by that time Velocette were on the slippery slope ....

Triumph also made a scooter called the Tigress which used the four stroke 250cc parallel twin engine originally designed for the Sunbeam motorcycle which was aimed (unsuccessfully) at the American market. - The Tigress was actually a good scooter, it had unusual front forks (resembling conventional forks with twin legs) but which were turned through 90 deg. making it a unique one sided setup and easy to remove the front wheel - It actually handled better than many motorcycles of the day! (I owned one for a short time).

Might try and dig up some info on all these machines, unless Husa beats me to it of course ........ Husa - you there?

I think the Viceroy was a little smaller 200cc? nope 250cc
appears to be 2t

http://velobanjogent.blogspot.com/20...-to-small.html
there was also a convention bike called the Valiant that used what appeared to be a OHV LE engine.

There was a guy in NZ that put a tigress into a Cub or 3TA chassis it looked rather nice.
the viceroy and the later Le had a conventional box from what i read the hand shift on the LE was meant to make it easier for a car driver to learn to shift (i doubt it was)

[WilDun]

https://www.dailymotion.com/video/x2u3jlz
Sunbeam S7


__________________________________________________ __________________________________________________ ______


https://www.pressreader.com/australi...81625306417441
The 250cc Triumph Tigress (which used the engine from the Sunbeam S7 above) was often criticised, but was really a good design (if it had been properly de-bugged) - unfortunately it just arrived at the wrong time!
The BSA/Sunbeam version came with the BSA Bantam 175 engine installed in it.


https://books.google.co.nz/books?id=...0forks&f=false

[WilDun]

Husa, I see you are about to hit 9999 posts - do try to make it on this thread! !

[ken seeber]

Husa, I see you are about to hit 9999 posts - do try to make it on this thread! !

Go Husa....the 10K Oddball...

[Pursang]

.
Oddballs are very welcome here!



The Viceroy engine was well conceived with lots of positive features, it deserved further development.

Case Reed induction was bleeding edge in the 70/80's let alone 1950/60's.

A water-cooled, racing version would have been So easy for Velocette. Beat the TZ by 10 years.


Husa, does 9999 mean you go back to Zero?

Cheers, Daryl.

[husaberg]

Triumph 2t i never seen.

[WilDun]

Interesting stuff - never before heard of that engine, - must say the Tiger cub looked a lot better with its original engine!- trouble is, the Poms (or at least the Pommie big wigs ) just flatly refused to believe or understand that they could be beaten!

They became desperate and tried anything but didn't have the cash to develop anything properly - All Britain's cash went to rebuild Japan and Germany ( ie in paying back the Americans for the stuff they got during the war (lend lease) and America immediately investing it in those two countries - the Russians and the British both had a hard time after the war, except that Russia had more resources to help them recover! - that's how I see it anyway!

Velocette I do believe had a potential winner there in the Viceory, but they folded like all the others so it never had a chance. I remember trying to buy a barrel and piston when the Viceroy was (supposedly) in production - I tried to buy them as new spares but just got a letter to say that they were unable to supply the spares I required for my scooter! - ( I had thought it would make a good starting point for a 125 racing engine). - but that's what things were like in those days!


ADDITION: - I was only interested in the engine of course, but was just having a browse on the Viceroy and came to the conclusion that they are UGLY looking beasts!! - funny thing is though, the Black ones actually look not too bad! .......Velocette not too hot on styling I must say. so, 9 out of 10 for the engine, ..... 2 out of 10 for styling!

[Pursang]

The 2 Stroke Triumph article loses some credibility with the 'chore horse' reference.
The Chore Horse was a 4 Stroke side valve, like a Briggs & Stratton, with a canted cylinder,
(probably to side step a patent).
Re: the 1967? Triumph Two Stroke. Why? Why? Why?, for God's sake, didn't they just update the Ariel Arrow engine.
Twin Carbs, Alloy cylinders, 5 speed box, then rename it Triumph (or BSA, AJS, Norton, etc, etc, etc.) And put it in a conventional frame. Development cost = $SFA
That's what a 1959 Yamaha YDS-1 looked like, FFS! (and pretty much, every one, ever since).

(Miss)Management with too many Ego's, brand loyalties (and dis-loyalties) and Head in Arse, Bulldog, pigheadedness, I guess.

It's pretty obvious how the Japs left them behind.

Three Rousing Cheers, for (what was) the British Motorcycle Industry. Daryl