Eric Cope smashes 127mph at Elvington on full-bodied Taylor Tuned Lambretta 250cc

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hendy
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a.lo.v2 wrote: Thu Jul 09, 2020 1:03 pm
EddieStone wrote: Wed Jul 08, 2020 11:41 am
Am I the only one that is amazed to see that at speeds around 100mph it takes an extra 10hp to get another 10mph?
The old Law of diminishing returns :D
Wind resistance is proportional to the square of your speed. So increasing your top speed by about 40% means double the required power. OR, you need to halve your drag coefficient; pretty difficult even if you lie prone.

In a vacuum, any lambretta could reach several hundred mph. Assuming you could get an air supply to your carb :lol:
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drunkmunkey6969
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Here is a video of the man in action and a bit of the scooter specification too: https://youtu.be/jYw-Df75Olg

:ugeek:

Looks like fun, wonder what that engine would do in a cut/raked frame with slim/low leggies?! :shock:
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drunkmunkey6969 wrote:Here is a video of the man in action and a bit of the scooter specification too: https://youtu.be/jYw-Df75Olg

:ugeek:

Looks like fun, wonder what that engine would do in a cut/raked frame with slim/low leggies?! :shock:
I’m sure Darrell knows +\- 1 mph! Image


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drunkmunkey6969
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Avantone wrote: Thu Jul 16, 2020 2:01 pm
drunkmunkey6969 wrote:Here is a video of the man in action and a bit of the scooter specification too: https://youtu.be/jYw-Df75Olg

:ugeek:

Looks like fun, wonder what that engine would do in a cut/raked frame with slim/low leggies?! :shock:
I’m sure Darrell knows +\- 1 mph! Image
He does, I'm just stimulating debate... :lol: :lol:
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drunkmunkey6969 wrote:
Avantone wrote: Thu Jul 16, 2020 2:01 pm
drunkmunkey6969 wrote:Here is a video of the man in action and a bit of the scooter specification too: https://youtu.be/jYw-Df75Olg

:ugeek:

Looks like fun, wonder what that engine would do in a cut/raked frame with slim/low leggies?! :shock:
I’m sure Darrell knows +\- 1 mph! Image
He does, I'm just stimulating debate... :lol: :lol:
Well if we’re talking about traditional group 6 with vega legshields, I don’t think there’d be much difference (could even be slower)
In a good streamliner, I’d guess 150+

Dunno - interesting stuff Image


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Avantone
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Avantone wrote:
drunkmunkey6969 wrote:
Avantone wrote: Thu Jul 16, 2020 2:01 pm I’m sure Darrell knows +\- 1 mph! Image
He does, I'm just stimulating debate... :lol: :lol:
Well if we’re talking about traditional group 6 with vega legshields, I don’t think there’d be much difference (could even be slower)
In a good streamliner, I’d guess 150+

Dunno - interesting stuff Image


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So when do tyres become the limiting factor?
Fag packet calculation says 10” tyre rpm at 127 mph is about 42 revs/second (150 mph takes it up to about 50 rps)
Serious balls!


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drunkmunkey6969
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Good question, these are fit for 112mph: https://www.scooter-center.com/en/tyre- ... BGM35010SL
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Yes, tyres have got to be a concern now.......mine were red hot, when I did the records in 2014.
Some Background Info..........Record Breaking
For those that are not aware, Straightliners, the organising club, run Top Speed Tuesdays throughout the racing season at Elvington, North Yorkshire.
There are very few places in the UK now where this can be done, due to the length of available and accessible runways, noise concerns, track conditions, etc, there has to include a good braking area, there are bikes now going over 270 mph on the mile and they have to have room to stop.
These are timed one way runs, and the activity is the Standing Mile, not the the Flying Mile as has been reported elsewhere.
Quite simply you go from a standing start and your speed is measured at the mile distance.
The Flying Mile is where you have a long run up, then travel a mile at full speed and get an average for the mile, not for the faint hearted.......+ you need a long runway......
At least once a year Straightliners, which is also the UK Timing Association, in conjunction with the ACU, run records meetings at Elvington.
There has to be enough riders who want to break records to make it viable to run a records meeting ...................
These are British records, for them to be internationally recognised, FIM Timekeepers have to be present, which of course costs £££££ and adds to the entry costs for the riders
If
To set a record you have to run to run in both directions, in the case of Elvington, West to East, then East to West and beat the existing record by 1%, that is the real killer, beating the existing record by 1%.
The two speeds are added together and divided by two to give an average speed over both directions
(Elvington has treacherous crosswinds, which blow you around at speed).
You are not allowed to touch the engine between pairings, and only refuelling is allowed.
If you do need to work on your engine after a pass, tough s**t, you'll have to return to the paddock, do the work and come back out and have another go at a pairing, provided that you don't run out of day.......lol.
So as you can see record breaking is not as simple as it first appears.
The current record holder for the Standing Mile is Keith Terry.
His average is 114.887 mph.
So in laymans terms, to beat this record the average would have to be 116.0358 mph........not easy.
If Eric's reliability record continues, there's no reason to suppose that he won't break Keith's record.
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RManson wrote: Thu Jul 16, 2020 8:29 am
Grumpy225 wrote: Fri Jul 10, 2020 11:04 pm This needs to be run at the Bonneville Salt flats. https://saltflats.com/


Set a world record, be that guy. :D

We ran open class at Bonneville last year, it's a blast. I ran a RB20 on a cutdown (exploded the crank). Costa Mesa rider on his Monza 230 made 87 mph and there was Utah rider on a full body S2 with a quatrini 210 that hit the mid 70's.

There is at least one person (Geramy) building a Casa case with rotary valve and a few more from California building bikes for Bonneville.
When do they allow the scoots to run? Familiar with Speed Week, World of Speed, SCTA, USFRA, but as I understand, none of those sanctioning bodies allow 10-inch wheeled bikes to run. Thanks!
We ran at world of speed with the USFRA in the open “run what you brung” .There are no official records for scooters yet due to tire size limitations. A few of us were working on petitioning the SCTA for a rule change to allow scooters with 10” tires a chance to compete.

The runs are recorded so it’s pretty easy if you know who’s running what number.
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EddieStone wrote: Wed Jul 08, 2020 11:41 am Am I the only one that is amazed to see that at speeds around 100mph it takes an extra 10hp to get another 10mph?
Check this out: https://www.youtube.com/watch?v=86KW85A1n9U
See our YouTube scooter channel for Tech-help: https://www.youtube.com/c/TheScooterFactory/videos
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