Forget about two wheels, here's a bunch of MONOwheels.

[Steam]

Ohhh yeah, sweeet mechanical madness.
It's interesting, but whoever thought it would be a good idea?

Many more here:
http://www.darkroastedblend.com/2008...-known-to.html

[Greyham]

looks like something out of star wars

[Strang0r]

Mr. Garrison, tired of the inefficient and frustrating airline check-ins, decides to invent his own vehicle. Inspired by watching singer Enrique Iglesias' sexualized singing on TV and by gyroscopes, he invents the gyroscope-powered monowheel "IT."

[Ixion]

Ohhh yeah, sweeet mechanical madness.
It's interesting, but whoever thought it would be a good idea?

Well, Capt. Sir Isidore Dunn-Spagthorpe RFC [1] for one. The picture at the right of the OP appears to be a blatant rip off of the famous Spagthorpe Rottweiler.(pic attached). Unfortunately it is not possible to tell if the imitation includes the hallmark chain driven oil filter of the Spagthorpe design (the Spagthorpe is not, of course, the only motorcycle to include an chain driven oil filter - indeed they are quite common. But to the best of my knowledge, it is the only monocycle. Correction is welcome)

[1]. RFC = Royal Flapping Corps. A little known but gallant group of early aviators who embarked upon a quest to overcome one of the most serious problems inherent in the use of the aeroplane as a weapon of war. Early aeroplanes incorporated an engine at the front (well, successful ones. Quite a few mounted the engine at the back, but this meant the 'plane went backwards, and the pilots invariably succumbed to wry-neck) , and a propellor affixed to said engine. Naturally , come wartime, people wanted to mount huge machine guns and cannons in front of the pilot, so that they could shoot down enemy planes, and generally hoon about. The problem was, that firing the nice big guns always ending up shooting off ones own propellor, which usually had a detrimental effect on performance (not always. Some of the early aeroplanes the performance was so bad nothing could be detrimental to it). So, the gallant baronet and a group of like minded (albeit small minded) friends grappled with the problem. In a brilliant flash of insight, the baronet realised the answer. The problem was the propellor. Ergo, renmove the propellor, and the problem is solved. Initial experiments proved the correctness of his theory. With the propellor removed, the planes didn't crash. However, nor did they actually get into the air. Which left the aeroplane as a rather inadequate contender to the tank. Never a man to admit defeat, Sir Isidore reasoned that birds didn't have propellors. And they fly. So, if the planes had flapping wings , they too would fly. Initial trials were somewhat promising, but fell short of complete success. The planes still stayed on the ground. Sir Isidore then reasoned that he needed to study very LARGE birds. Most large birds are sea birds. He observed that large sea birds lived on cliffs. Eureka, he squeaked (he always had a rather high voice, a regrettable result of an unfortunate incident with a pyjama cord as a child) . That's the answer, all that is needed is a little initial assistance. Like seabirds, we will launch ourselves off high cliffs. Once launched our flapping wings will carry us aloft.

Unfortunately , there is no record in the public archives of what became of the RFC. It is known that the gallant baronet died shortly afterwards, and the mystery surrounding his death makes it highly probable that he, and his gallant band, were viciously assassinated by agents of the Kaiser. Nothing else can explain the sudden and total disappearance of the RFC from history

[Dave-]

/takes bait

the machine guns on early prop planes was trigger timed to only let bullets fire when there'll be a gap.

it's simple mathematics.

note: I want a mono wheel

[Ixion]

/takes bait

the machine guns on early prop planes was trigger timed to only let bullets fire when there'll be a gap.

it's simple mathematics.

note: I want a mono wheel

Mathmatics is never simple when it involves explosives. Or the Spagthorpe family. Of course the men in the flying machines TRIED to fire at the point when there was a gap. But the propellors went round so fast.

[DingoZ]

[CookMySock]

oops, maybe his steering geometry was set up wrong? I saw a unicycle on the open road once - this bloke was fully loaded with backpack and the whole nine yards, and he had his head down and bum up and he was making time - no mucking around! I couldn't quite believe my eyes. It was then that I thought a litre unicyce superbike would be possible - that would make mr plods eyes water.

DB

[sinfull]

Gimme trainers on that bastard @!