Congratulations to Beaulieu One Hundred member Zef Eisenberg on setting the new turbine world land speed record.

Read on for Zef’s description of this incredible achievement.

Zef Eisenberg2

Saturday 16th May started very well, with the very first run of the day seeing our August 2014 top speed raised from 224.9mph to 225.6mph. This was ‘right out of the box’ with no other testing, other than our dyno in Guernsey. After that the speeds started to get hard, real hard with strong cross wind gusts, and every 1mph increase near impossible, due to the intense wind resistance at that speed with no fairing at all. The physical pain in holding on, was intense with the ‘upright bars’ and arms out position acting like a parachute. By the end of the day, the 228mph top speed goal had still alluded us. By 5pm, it was time for food and thought.

Zef Eisenberg1

The team spent the whole evening looking at the motorbike ECU datalogger to see where we could make improvements. We worked out we needed another 100hp to gain just another 6-7mph, as the drag on the bike is about 0.9 Cd which is about 3 times that of a sports fairing bike like a Hayabusa, which has a drag of around 0.35 Cd. We decided we would go all out and increase the fuel flow on the turbine to maximum and increase the water-meth cooling to max flow also. The safety parameters were raised to the limit (auto-cut out on the turbine) to ensure we had maximum power, with safety still.

Sunday started with strong winds and slight rain, but we were not perturbed, as the bike was now set up perfectly for the conditions. The speeds started to climb frustratingly slowly. I explained to the team, that we cannot go back to Guernsey without a top speed of at least 228mph + So we decided it’s going to be an all or nothing next run…

I literally held on with every ounce of strength and held that throttle on full, to push out an amazing new top speed of 231.5mph with an upright ‘Streetfighter’ bike, with no fairing and and upright motorcross style bars!!

Zef Eisenberg3

I can’t tell you how relieved we all felt. We now felt confident. The bike was handling superb, like a turbine powered bullet train. The data logger and torque sensors were showing levels around 480lbft at the turbine, regular spikes of 1100lbft at the rear tyre and 542hp, which interestingly is over 100hp more than last August’s Top speed event, where we set a top speed of 224.9mph.

Everything started to fall into line, and by the end of Sunday, we walked away with:

World’s Fastest ‘Streefighter’ @ 231.5mph (one way) World’s fastest Turbine bike (official ACU 2 way average 1 mile – 225.759mph) Britain’s fastest ‘naked’ bike (no fairing or aerodynamic aid at all – open bike) – official ACU 2 way average 1 mile – 225.759mph)

We then decided to change the ‘upright’ bars to ‘clips on’ to get out of the wind more. This allowed us to achieve a best ever (world) one way top speed for a Turbine bike @ 233.7mph. In the process also setting a new World Turbine bike record for flying 1/4 mile of 3.910 seconds!

. . . and this is all with a road legal motorbike (lights, indicators, reg plate, etc..) that consumes normal Diesel and road legal tyres, no slicks or tyre warmers are used!

A special thanks must go to my amazing team, James and Miguel and all those people in Guernsey who have helped us, and who without their assistance and help, it would not be possible to achieve these speeds, such is the importance on quality of engineering, safety and attention to detail – at such crazy speeds. Last, but not least my sponsors TAG Heurer, who sponsor the bike and share the same passion in engineering excellence.

Zef Eisenberg

Editor’s note: The bike will be on display in June at Goodwood Festival of Speed – on the TAG stand outside the Drivers’ Club – and at Beaulieu on the 12 July for our Simply Bikes event.

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