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Stunning ultra-sleek TMC Dumont motorcycle has record-breaking 36-inch hubless wheels [tr]
UK Daily Mail ^ | August 8, 2018 | Phoebe Weston

Posted on 08/08/2018 9:57:01 AM PDT by C19fan

A former Formula One driver has designed an ultra-sleek new motorbike, known as the TMC Dumont, powered by a vintage 300-horsepower Rolls-Royce Continental V6 aircraft engine.

The futuristic ride has 36-inch hubless wheels – 'the largest wheels ever made for a motorcycle' according to the Brazilian creator Tarso Marques.

The wheels are fixed to the base of the rim giving the motorcycle the appearance that it is 'floating' on the road.

Creator Tarso Marques said he has been dreaming about the design for 15 years, which he describes as the 'most expressive event of customisation in the world'.

The motorcycle was built for the 77th Daytona Beach Bike Week rally event in Florida, where it was awarded the title of ‘Best in Show’ earlier this year.

(Excerpt) Read more at dailymail.co.uk ...


TOPICS: Miscellaneous
KEYWORDS: motorcycles
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To: SgtBob

Those look more like Tiara cylinders - 550A induction is on the bottom..so it could be a 540cu in motor (stock bores), or over-bored slightly. Those motors are obsolete as far as I know.

I think the Rolls Royce claim is just marketing...


61 posted on 08/08/2018 12:19:24 PM PDT by f1boss (YGBSM!)
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To: Steely Tom
Every time you go over a bump, there's going to be significant up-and-down oscillation ...

It has got invisible 'rubber baby buggy bumper' shocks for that.

Smooth rides are so passé!

62 posted on 08/08/2018 12:19:47 PM PDT by SES1066 (Happiness is a depressed Washington, DC housing market!)
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To: C19fan

"I call her "Margaret".

63 posted on 08/08/2018 12:24:19 PM PDT by Jonah Hex
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To: Red Badger

64 posted on 08/08/2018 12:28:33 PM PDT by freedomlover
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To: C19fan

So gay!


65 posted on 08/08/2018 12:33:09 PM PDT by DungeonMaster (If your church believes in evolution it is not a Christian church.)
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To: Red Badger
The O-300 is a modernized C-145 and retains the same weight, dimensions, bore, stroke, compression ratio, displacement and output power of the earlier engine

What's the point of "modernizing" it if you don't reduce weight or increase power (or both). Sounds like they spent a lot of money on engineering, testing, and qualifying it without ending up with a better product. In an ideal world, some folks would lose their jobs over a costly fiasco like that.

66 posted on 08/08/2018 12:34:24 PM PDT by PAR35
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To: Red Badger

Well, I had to chop my Harley front and rear so I could reach the ground...but that’s just dumb! :-)


67 posted on 08/08/2018 12:37:10 PM PDT by left that other site (For America to have CONFIDENCE in our future, we must have PRIDE in our HISTORY... DJT)
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To: f1boss; fireman15

Rolls Royce built some under license. Maybe it was a license built one rather than one built here.


68 posted on 08/08/2018 12:38:18 PM PDT by PAR35
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To: PAR35

Probably just added electronics..............


69 posted on 08/08/2018 12:40:20 PM PDT by Red Badger (July 2018 - the month the world learns the TRUTH......Q Anon)
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To: oldplayer
IO-550-A Looks liquid-cooled. Do you think the radiator is receiving forced air?


Nah, it's air-cooled. You can see the cylinder fins if you look closely at the Mail pictures.

Continental did (does?) make a liquid cooled version but this isn't it.

70 posted on 08/08/2018 12:47:09 PM PDT by az_gila
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To: jaydubya2

Rocky Mountain Oysters in the making!!


71 posted on 08/08/2018 6:13:30 PM PDT by SgtBob (Freedom is not for the faint of heart. Semper Fi!)
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To: PAR35

Horizontally opposed...like a Gold Wing engine.


72 posted on 08/08/2018 6:14:50 PM PDT by SgtBob (Freedom is not for the faint of heart. Semper Fi!)
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To: PAR35
Rolls Royce built some under license. Maybe it was a license built one rather than one built here.

Thanks, I didn't realize that.

73 posted on 08/08/2018 6:16:31 PM PDT by fireman15
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To: fireman15

Brits have no concept of American engines. They would probably say that Abita beer is brewed in Mollington, England. :-)


74 posted on 08/08/2018 6:17:56 PM PDT by SgtBob (Freedom is not for the faint of heart. Semper Fi!)
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To: oldplayer

Finned, and air cooled.


75 posted on 08/08/2018 6:19:03 PM PDT by SgtBob (Freedom is not for the faint of heart. Semper Fi!)
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To: jim_trent

Head scratching myself, it could be an IO 540. I have seen an 80 inch shovelhead in a home build aircraft. Too cool.


76 posted on 08/08/2018 6:22:02 PM PDT by SgtBob (Freedom is not for the faint of heart. Semper Fi!)
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To: f1boss

You are right about the induction. It does look more like a 540, and looking at the valve covers, I’m thinking Lycoming.


77 posted on 08/08/2018 6:24:27 PM PDT by SgtBob (Freedom is not for the faint of heart. Semper Fi!)
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To: SgtBob

As good as the IO-540 is... for airplanes... it is surprising to me that someone would consider it to be a good choice for even a “concept motorcycle”. Airplane engines designed for small airplanes are designed to operate in a narrow range of RPMs. Nearly all IO-540 powered airplanes that I am familiar are equipped with variable pitch propellers. I do not think that any of the IO-540s are designed to run at more than 2700 RPM. Motorcycle engines typically are able to be revved up to much higher RPM to get maximum power from their displacement.


78 posted on 08/08/2018 7:24:52 PM PDT by fireman15
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To: SgtBob
You are right about the induction. It does look more like a 540, and looking at the valve covers, I’m thinking Lycoming.

It is a little confusing because the engine has some unusual mods, but it looks like a Continental. Have you ever seeing a Lycoming 540 without pushrod tubes mounted on top of the cylinders?

79 posted on 08/08/2018 7:49:38 PM PDT by fireman15
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To: SgtBob

My old eyes just couldn’t see the fins. (Still can’t, LOL) I’ll take youal’s word for it.

That 550 will make about 300 HP at 2750 RPM, won’t it? (I’m a Lycoming guy and am just guessing.) Should have enough low end torque to pull that bike effortlessly.


80 posted on 08/08/2018 7:57:56 PM PDT by oldplayer
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