Back in November Graeme Obree put the Beastie through its paces on Machrihanish airport in the run up to his human-powered land speed record attempt. The bike itself handled well but the shell that goes round the bike was proving problematic.

The rattling goes right into your head because you’re so close to the ground

It was a windy day and pouring with rain which hampered visibility. Obree’s team was eventually forced to cut a hole in the front of the fairing to allow Obree to see clearly. But visibility wasn’t the only issue; Obree was unhappy with the overall shape of the shell, believing he could make it far more aerodynamic.

New fairing

Obree went back to the drawing board and came up with a brand new design, which was revealed last week as he tested out the Beastie at Prestwick airport. Gone is the transparent, two-piece shell to be replaced by a far more streamlined and sleek looking fairing made from Kevlar and fibreglass.

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The new fairing is made from Kevlar and fibreglass.

Obree says, “The front section is rounded, then it widens out and widens out and then comes back in, in a very smooth curve and narrows down to the back end…the most important part in terms of dividing the air and then pulling the air back in again with the least amount of energy is to have a laminar (non-turbulent) flow over the sides of it.”

After testing it last week however,  there were still certain issues that need resolving before he has a pop at the record in Nevada this autumn. The main problem is the launch. At standstill the bike simply topples over so it requires two people to push it forward, to get some momentum before going along unaided. But the new shape that narrows towards the end makes it hard for those pushing to get much purchase.

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Obree’s team found it difficult to launch the Beastie.

Obree says, “I wanted to go at a great speed right away but the guys couldn’t launch me. Back when I tested it at Machrihanish airport, I only needed one person to launch it so I assumed it wasn’t that hard to keep me upright and push me in a straight line but because it’s now all slippery and fish-shaped it’s hard for them.”

Visibility

The Beastie now has an opening at the front to give Obree better visibility but, again, Obree is still finding it hard to see where he is going.

The surface [in Nevada] is dead smooth both on the micro and the macro level

He says, “The rattling goes right into your head because you’re so close to the ground.” This makes it hard to see the white line down the middle of the runway, which he uses as a guide as he goes along.

Obree got up to about 50 mph but he wasn’t pushing it to its limits because he couldn’t gauge how much runway was left. He says, “When you are 2ft 6in off the ground you can’t see how much runway you’ve used so I never actually got to my max speed. Also, you’re over geared because it is really geared to be doing 80 or 90mph.”

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Obree got up to 50mph but he wasn’t pushing the Beastie to its limit.

The road surface itself wasn’t terribly smooth. Obree says, “Although it is a nice long bit of tarmac, it is actually made of quite large stones. For planes landing, with big bulky plane wheels it’s fine, but on a bike it can be rumbly and you can get a wee bit of resistance off it as well.”

Smooth road

However, the conditions in Nevada will be much better. He says, “The surface is dead smooth both on the micro and the macro level. It has a smooth, finished tarmac rather than squashed stone tarmac, it is slightly down hill, the air is better and the temperature is better.”

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The Beastie needs to be caught at the end to stop it falling over.

Despite this, Obree is not entirely confident he will beat the Canadian Sam Whittingham’s record of 83mph. He says, “To go at that speed, and Wittingham is no slouch as a cyclist either, you’re thinking, I have to respect this record, it’s not going to be easy to break. But there is also the British record of 63mph held by Jason Queally. So I’m looking to break that but of course, the big cherry would be to break the world record. I hope I can but I haven’t gone at any great speeds yet, so really you know as much as I know.”

Obree will be attempting the human-powered land speed record in September on the appropriately named Battle Mountain in Nevada. We will keep you informed of any developments as the big day approaches.


Watch the video below to see Obree testing out the Beastie at Prestwick Airport:


Photos: Rick Robson


For more Graeme Obree articles on Humans Invent please read:

Breathing: The Graeme Obree Way

Graeme Obree tests the Beastie for the first time

Return of the Flying Scotsman: Graeme Obree

Graeme Obree: Hand-building the world’s fastest bicycle

Obree set for land speed record attempt in Britain

Graeme Obree calls for the return of airships

The End
  • 25hz

    Prone bikes and linear drives are two things that recumbent/HPV builders discovered didn’t work very well. Interesting thought experiments, but not effective. The HPV innovators, just like Graham, discovered these things many years ago, if not decades, and they aren’t used by riders who are serious about speed and efficiency, because they are neither fast nor efficient. Maybe Graham thinks the recumbent builders are as stagnant thinkers as the upright crowd. If so, he would be wildly mistaken. The HPV racing crowd has been trying to get Graham to try bents and HPVs for years. They recognize cycling talent and they appreciate people who think outside the box. With very little effort, Graham could see HPV development history as well, and it wouldn’t be difficult to figure out why the fastest bikes in the world look the way they do. I think Graham, in the midst of all his media spin, does a disservice to all the innovators that have pushed the HPV group to be the fastest cyclists on the planet. Hopefully, he doesn’t end up like Blueyonder and then immediately drop out of the HPV scene to save face.

    • Danny

      Give the guy a chance!!! Lets see how he performs before writing him off!!!Good luck to him

    • Simon Phillips

      Show some respect. This is Graeme Obree. True innovators, like Obree, operate outside conventional groups. He’s already achieved so much, so anything else is a bonus. What have you ever achieved 25hz?

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