Graeme Obree plans to shatter hpv world land speed record

sk8norcal

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personally, I think he is talking crazy... :lol:
maybe just to hype up his attempt...


http://road.cc/content/news/49299-ton-graeme-obree-plans-shatter-human-powered-vehicle-world-land-speed-record

also planned attempt by a Dutch speed skater...
http://road.cc/content/news/49615-graeme-obree-facing-dutch-competition-human-powered-vehicle-record-attempt-video


Nearly two decades after Graeme Obree first shot to fame by emerging from obscurity to take the Hour record, the Flying Scotsman has his sights set on another benchmark – he’s looking to break the human-powered vehicle land speed record.

Not only that, but the 46-year-old, who today formally launched his training manual, The Obree Way, told BBC Scotland that he aimed to shatter the current record of nearly 83mph in style.

"I don't want to curse it, but I would like to do 100mph," he said. "If everything was perfect, with the power output and aerodynamic drag then 100mph might be possible.”

Obree famously broke the Hour record, previously held by Francesco Moser, for the first time in 1993 on a bike, Old Faithful, that he had designed himself.

Chris Boardman would better his distance of 52.270km later that year, but Obree would take it back in April 1994, setting a new benchmark of 52.713km.

By the end of the year, Miguel Indurain would have bettered that distance, bringing to an end a few months of intense competition between individuals that captivated the cycling world as well as the wider public.

For some, Obree’s exploits evoked Sir Malcolm Campbell’s record-breaking feats of the 1920s and 1930s when he broke the world land speed record nine times.

Like Campbell, who in 1937 became the first person to reach a speed in a land vehicle in excess of 300mph, Obree plans to better the human-powered record in the United States and at a location synonymous with record atempts.

While Campbell set that record at Bonneville Salt Flats in Utah, which would become the default location for a series of successful attempts on the land-speed record until the 1980s, Obree looks likely to attempt to write his name into the record books at Battle Mountain, Nevada.

That’s where Sam Whittingham set what was then a new world record of 72.75mph in 1999, with the Canadian bettering that speed at the same location five times since then, most recently in September 2009.

In that month, Whittingham took the Georgi Georgiev-designed Varna Tempest, effectively a recumbent bike encased in a fairing, to a speed of 82.819 over the 200 metre timed section following a flying start to set the benchmark recognised by the International Human Powered Vehicle Association.

That’s less than 2.5mph quicker than the then record speed he had set back in 2001, so if Obree were to hit three figures, the effect would be akin to that of Bob Beamon’s long jump world record at the Mexico City Olympics in 1968.

"I am setting out to attack the world land speed record, which is on a bicycle, but there's no rules," explained Obree.

"It's a branch of the sport called human powered vehicles. The record is set as under the same conditions as cars - it's on a flat road, not wind assisted, and with no other vehicle assistance,” he continued.

Obree added that the attempt would be made “on a straight, flat road,” and “probably at Battle Mountain."

"I'm building the bike myself with some help," he went on. "The whole thing is no more than three feet off the ground - it's basically a human torpedo - you pedal it like fury.

"I've kept my fitness over the past few years and I've kept it going which means I have good shout of getting the power up.

"I've been thinking about this for 15 years - but when it comes to the skin, it's not my area of expertise.

"The skin is a vitally important combination of carbon and Kevlar in case you fall off at 100mph. If that happens, then you're going to lose some of your own skin, which is not worth thinking about.

"I'm always thinking what the limits are - I take everything to a limit where it can be - and that's what sport is all about: taking everything to its possible limit."

Obree, who besides his Hour exploits was also world individual pursuit champion in 1993 and 1995, struggled with depression and attempted suicide for the second time in 2001.

That episode is recounted in his autobiography, The Flying Scotsman, later made into a film, though more recently he has been raising his public profile once more.
 
Nuts are good
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. ~G.B. Shaw, Man and Superman, 1903
:D
 
It's pretty ballsy to say you are going to beat Sam's record. I am very interested to see his HPV that he builds. The Varna streamliners have crushed their competition and seem to be a magnificent design.


I want two things:

A similar streamliner, abit with a bit more room inside for daily use / transportation.
A world where I can ride such a streamliner safely.
 
Ah, I did miss the news on the latest speed runs. The other guy's design is interesting. I'd like to see wind tunnel stats on both these machines.
 
There's a 0% chance he adds over 17mph to the existing record without some kind of conditions advantage.
 
Crikey.... Using a vehicle with the same CdA, you would need to generate 1.76x more power than was needed for the existing record, in order to achieve 100mph.
 
John in CR said:
There's a 0% chance he adds over 17mph to the existing record without some kind of conditions advantage.

If anyone can do it Obree can. His unjustly banned bike was inspired.

Also one of the few cyclists that held the one-hour record without ever being shrouded by the miasma of drugs.
 
Miles said:
Crikey.... Using a vehicle with the same CdA, you would need to generate 1.76x more power than was needed for the existing record, in order to achieve 100mph.

so thats cubed losses for wind resistance? for this application its prolly fair, but do we really know that its just as simple as cubed with all the weird turbulence stuff going on for us? ive kinda seen the power needed closer to squared plus a bit ??
 
toolman2 said:
Miles said:
Crikey.... Using a vehicle with the same CdA, you would need to generate 1.76x more power than was needed for the existing record, in order to achieve 100mph.

so thats cubed losses for wind resistance? for this application its prolly fair, but do we really know that its just as simple as cubed with all the weird turbulence stuff going on for us? ive kinda seen the power needed closer to squared plus a bit ??


The aerodynamics of such streamliners are just so vastly different than a normal bike rider, that I don't think you can apply the same equation to extrapolate power requirements.

An unfaired bike rider is such an incredibly horrendous shape to be pushing through the air, I wouldn't be surprised if it was more than just squared.

Could these streamliners be some of the most aerodynamic shapes in the world? At least in the practical world. What about missles? No wheels to disturb airflow.
 
This guy made some interesting comments regarding the run-up length.
Sounds like its part of the reason for the faster top speed once IHPVA start using the Battle Mountain course.

UprightMike:

Both the Cheetah course and Battle Mountain have the same maximum amount of downslope (2/3rds of 1%) allowed by IHPVA rules. This rule was set in place around 1980 to account for the fact that no courses are really "flat". This equates to a drop of about 177 feet over 5.38 miles. The Cheetah set this record on Six Mile Lane which runs along the south border of Great Sand Dunes National Park near Alamosa, Colorado in the San Luis Valley. These guys used only about 2-3 miles to get up to speed.

At Battle Mountain, the run-up (acceleration phase) before entering the 200-meter timing trap is over 5 miles. The Cheetah team used only about 2 to 3 miles as I mentioned below. The Alamosa course, due to whatever concerns with the local ranchers, cattle etc, didn't allow for a longer run-up to built up speed. On 2 mile qualifying runs at Battle Mountain, the current world's fastest human Sam Whittingham (82.82 mph) has reached about 66 mph less than the Cheetah's speed.

The Cheetah might have gone 75 mph at Battle Mountain with a longer run-up to build up speed. Its shape was optimized for 70 mph. I emailed the guys a long time ago. I guess the Dexter-Hysol Cheetah is just sitting there in storage somewhere. It would be great for someone to get it out and ride it at Battle Mountain.



Dexter-Hysol Cheetah 1992 HPV Speed record 68 MPH, Chris Huber

[youtube]LDA--6viq54[/youtube]
 
What a foolish statement for an engineer to make "we've reached the limit". Did he really think their design was the best and could never be improved upon?
 
veloman said:
What a foolish statement for an engineer to make "we've reached the limit". Did he really think their design was the best and could never be improved upon?

yah, that's pretty funny, he probably regret saying that now...
and yes, he probably did think their design was the best.... :D
These guys were fresh out of school, UC Berkeley engineering students. a bit too cocky, I guess.... :wink:

Regardless, its a beautiful bike underneath the fairing.
Carbon fiber frame...
Carbon road bikes were still a new thing in 92...
 
sk8norcal said:
this is interesting...
2001 attempt by a pro rider with big budget...

http://www.bikebiz.com/news/read/revised-hpv-rider-breaks-80-mph-barrier/04767

referring to Mike Burrows...
He also believes Queally could have topped 90mph if he was able to fit in Matt Weaver's HPV, a much more evolved design.


Blueyonder was too big, I was surprised when I first saw it.

The Kyle Edge streamliner has the best cda and drag of all made, if I remember correctly. They hit 78mph in it.
 
Take note:

"Average cyclists can coast at 30-40mph in a typical fully faired streamliner"


Yet "we" need 150hp to average those speeds in most of America.
 
veloman said:
The Kyle Edge streamliner has the best cda and drag of all made, if I remember correctly. They hit 78mph in it.

Matt Weaver is pretty amazing, rider and builder of his hpv.
http://www.speed101.com

"Average cyclists can coast at 30-40mph in a typical fully faired streamliner"

yes, but these full faired hpv's are all very impractical.
the Lightning F-40 was probably the fastest practical one back in the 90's.
and some riders reported scary moments when sudden gusts hit it from the sides.

IMO, everyone should be riding a 250cc Honda Helix,
only 20 hp :D
 
Wow I just posted that Cheetah video a week or so ago. I never thought I'd see it mentioned here. I have been going through a bunch of human power VHS tapes I was given and am trying to find the intersting stuff. Here are a couple other historical videos I uploaded recently. Interesting and sometimes funny stuff.

Historical video + 1982 IHPVA speed championships

[youtube]MUK2_RJmfHg[/youtube]

Sorry, quality is not great.

I found this footage tonight. No clues on the tape what it was originally made for.

Peter Graves narrates this 10 minute human powered vehicle documentary from the early 1980s. Video quality is bad, but it's still worth watching. It follows "Team Phoenix" from Cal Poly, San Luis Obispo and has great educational footage as well as race footage and a cameo from Gardner Martin after Easy Racers wins.

[youtube]ojIE7B83Das[/youtube]

-Warren.
 
Wow I just posted that Cheetah video a week or so ago. I never thought I'd see it mentioned here.

Warren, thx for those uploads!
I subscribed to ur youtube channel a while back.

I got interested in HPV's through ASME in early 90's, and later went to a couple of IHPVA events.
It was great to see a lot of home built recumbents/hpv's at those events.
So in many ways, it's kind of like ES, with many home built ebikes.
 
http://road.cc/content/news/54778-interview-video-graeme-obree-his-human-powered-speed-record-attempt

http://road.cc/content/news/59393-video-obree-explains-design-his-record-attempt-bike
 
http://www.gizmag.com/graeme-obree-100mph-bicycle/24073/

graeme-obree-speed-record-attempt.jpg
 
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