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The Windcheetah has had a long and illustrious
competition career, and many of the developments seen on production
Windcheetahs started life as performance modifications on racing
Windcheetahs.
Mike Burrows was extremely successful on his own Windcheetah,
securing the European HPV Championship on two occasions with
his highly modified race machine. The remarkable thing about
the Windcheetahs racing success is that the race machines are
by and large production based machines that can still be ridden
on the road. The majority of racing HPVs are specially designed
one-offs with very few concessions to creature comforts.
Andy Wilkinson and his Lands End to John O`Groats record
attempt.
To prove how versatile even a ' full race' Windcheetah could
be we decided to make an attempt on one of the ultimate road
records..The Lands End to John O`Groat's record. This involves
riding between the Southern and Northern extremes of the British
Isles in the shortest possible time. The route we chose started
on the craggy tip of lands End in Cornwall and snaked up through
England and the Scottish border country culminating, 861 miles
later, at the John O`Groat's hotel in the far north of Scotland.
The event was run to guidelines provided by the UK Road Records
Association [R.R.A.] and involved a number of incognito timekeepers
positioned at various points along the route. No pacing was
allowed nor was any vehicle slipstreaming permitted. Because
the event is run on public roads and has an incredibly diverse
terrain, from the flat expanse of Cheshire to the Scottish highlands,
we felt that it would provide a true `real world` test of the
Windcheetahs capabilities. Andy would have to cope with traffic
lights, juggernauts, careless drivers, adverse weather conditions,
in fact just the sort of stuff the rest of us put up with on
the roads! At some stage I will document Andy's remarkable achievement
in the detail it deserves, suffice to say that he set a new
record, and one, which we believe, will stand for many, many
years. Below are a few interesting facts and figures about the
record attempt;
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Andy rode virtually non-stop for 41
hours 4 mins and 22 secs, beating the previous record [also
held by Andy, on a `normal `cycle] by nearly 4 hours.
We had a rear axle fail near Bristol, early on in the ride.
This delayed us by over 1 hour whilst we fitted a replacement.
If we hadn't had this breakdown I feel certain Andy would have
put in a sub 40-hour time for the End to End. The failure was
caused by an unauthorized change to our axle design by an engineering
company contracted to produce some special lightweight components.
The components were delivered only a couple of days before the
start and we didn't have an opportunity to reject them. We were
unsure about the design change but felt we had no option but
to run with it. The Windcheetah was fully faired which adds
about 9lbs to the all-up weight. Our goal was to reduce chassis
weight by an equivalent amount so Andy would have an easier
time in the mountains. We managed to create a machine that actually
weighed less than a standard Windcheetah! After the ride Andy
had the opinion that it would be possible to achieve a time
of 36 hours if the right weather conditions prevailed.
At times Andy's speed was in the high 70`s [miles per hour]
on some of the long descents.
Feeding was a major logistical problem, rider consumption was
an amazing 81 litres of fluid in 41 hours. This huge fluid intake
also meant a huge output... We rigged up a special condom connected
to a metre-long tube to provide relief for Andy without having
to stop. The tube exited the Windcheetah at the rear of the
fairing.
Andy had two scheduled stops for a massage and a shower; he
slept for approx. twenty mins during 41 hours of intense effort.
On his way to break the record Andy broke a number of other
records, these records are all the more remarkable when one
considers that he was supposed to be conserving energy for the
ordeals that lay ahead. Here are some of the statistics;
First 100 miles 4 hours 4 minutes*
12 hours - 295
miles
24 hours - 530 miles
*the first 100 miles included long
uphill stretches over Exmoor and Bodmin Moor. Taking this into
account Andys speed over the first few hours is quite incredible.
Logistics; The support crew had over 20 people working round
the clock to keep Andy fed, watered and on time. The feeding
team had to make certain that Andy had a litre of fluid at approx.
half-hour intervals. Andy kept two bottles in the Windcheetah
and the crew would position themselves at strategic slowing
down points such as junctions and steep hills. As Andy approached,
often at high speed, he would jettison a used bottle and the
feeder would start sprinting flat out, as Andy overtook him
the feeder would hand a fresh bottle through the Windcheetahs
side window. The old bottle had to be retrieved and then a mad
dash to overtake Andy and find a suitable position on the road
for the next drop. Because of the dedication of the individuals
involved this operation ran like clockwork for 40 hours without
a hitch.
Technical specification of the End to End Windcheetah.
Tubing;
The main tube is 6000 series aluminium, turned down to reduce
wall thickness in low stress areas. The secondary tubes are
a special Metal Matrix composite produced specially for us
by Magnesium Elektron Ltd.
Castings; Three sets of magnesium
castings were produced, one for the `A` machine, one for the
`B`[spare] machine and a third set for back-up. This third
set was eventually built into a special Windcheetah that we
built for Mike Burrows and is in regular use by him. The `B`
machine was quite unusual in that it had a sliding front boom.
We built this first and Andy did about 6,000 miles of training
on it. The boom was fitted so that we could get the length
absolutely perfect for Andy. Once we arrived at the optimum
length we built the second machine trimmed exactly to Andy's
size without an ounce of extra metal.
Rear Wheel; Lightweight
700c, Continental Grand prix tyre with latex tube.
Front Wheel; IRC Rims
with standard 70mm Sturmey Archer hub brakes IRC tyres
Transmission;
Rear Cassette.`Goldtec` Titanium sprockets 11 - 24t
Chainset 58-44-32 Specially adapted T.A. cranks with special
rings produced by Chris Bell
Lightweight Shell, designed by Mike Burrows and made from
Carbon Kevlar and Carbon/ Aluminium honeycomb laminate.
Fasteners, all nuts, bolts etc are Titanium or Aluminium
Aero Wheel covers made from microlight wing fabric.

“He who brakes…loses!”
As well as our more conventional record-breaking activities
we do occasionally stray outside our acknowledged area of
pedal powered expertise and mix it with the big car manufacturers…racing
soapboxes!
The acknowledged pinnacle of UK soapbox competition takes
place each year at the Goodwood Festival of Speed. The Festival
is a huge event attracting over 150,000 visitors each year
and is a showcase for all the major motor manufacturers to
show off their performance vehicles. The event is based in
the grounds of Goodwood House, home to Lord March and takes
the form of a speed hill climb up through the grounds of the
stately home. For the past four years the event has featured
a soapbox derby, attracting entries from the likes of Ford,
Honda, Bentley, Prodrive Porsche et al. Plus a little known
cycle manufacturer by the name of AVD.
We were latecomer’s to the competition securing our
entry in year two of the event. As rookies we were seen as
also-rans and not expected to even feature in the results.
The circuit is a challenging downhill blind and is famous
for a 90 degree bend at the fastest part of the circuit which
needs to be taken flat out [60mph+] The car manufacturers
bring in 'ringers' to drive their devices and many famous
names from the field of motor sport have plunged down the
famous hill using only gravity as a propellant.
Things didn’t quite go to corporate plan for the major
car companies in the first year we took part because we won
the event outright. Unfortunately we never repeated the performance
at Goodwood and had to make do with a third and a fourth place
in subsequent years. Not bad when you consider the box is
made out of reject Windcheetah components and some off cuts
of carbon fibre, and that certain car manufacturers (who shall
remain nameless), spent an alleged £30,000 developing
their devices.
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Bob
receiving prize from Gordon Murray Chief Designer at
McLaren |
We have now retired from the cut and thrust of gravity racing,
but not before we set the fastest time down the Goodwood hill
this year…. unfortunately this heroic effort occurred
in practice and not in the race. We do have the consolation
of setting the fastest ever time down the fearsome Prescott
Hill in Gloucestershire at an event held there last year,
home of the Bugatti owners club. This white-knuckle achievement
is not one I would ever care to repeat. Plunging down a very
steep hill between large trees and resilient looking Armco
barriers is not very sensible for those wanting to reach retirement.
What has all this got to do with Windcheetahs? Absolutely
nothing but most of our customers seem to enjoy seeing us
give the car companies a hard time so I thought I’d
include it on the website.
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