MOTEC ELECTRONICS EXPERT
Apart from controlling the fuelling what else are you measuring?
We’ve got just about everything you want to measure all covered: ground speed, GPS speed, drive speed all the engine data you’ll ever need, oil temp, water temp, intake temp, compartment temp, pre-turbo temp, air pressure... the list goes on and on. And that is for each engine. We also measure wheel speed and suspension travel front and back, and full pitch, yaw and roll.
Do you have traction control?
We have full traction control. It worked by retarding the ignition for a short while, then we go to a cut ignition setting – but we really don’t want that, as we’re filling up a big exhaust with wasted fuel and air. We try to simply retard the ignition as much as possible to try and get it back in line, but we also have to allow for some slip – it’s inevitable.
How much slip does the system allow?
The rear wheel spins quicker than the front. We are looking at around 430mph rear wheel speed for a 400mph ground speed. If the front is doing 400 then the rear will be 420-430mph by our estimations. Around a 4% slip is what we are expecting. You have to remember we have no real downforce. Guy controls the power but I’m trying to give him some help, as this has the potential for over 1000bhp on a slick tyre. Guy actually starts by rolling the power then goes all in and I try to help when he hits a soft bit of the track for example. We are aiming for a constant 0.3G of acceleration.
Do you also measure G on deacceleration?
Yes we can measure that. When the parachutes open we see about 1.5G negative, then it starts to drop off. The ’chutes do a really good job of stopping the bike. On a good racebike on track we’d see about the same 1.5G, F1 cars can go up to 5G, so it’s not that much.
Is Guy always upright?
He usually has just a fraction of lean all the way down the course. It’s back and forth depending on acceleration and braking but he is never 100% upright – or very rarely.