I had a conversation with the Japanese H2 design and build team and one of the topics I raised was the aerodynamics of the bike.
My point was that while the H2 itself is undoubtedly a slippery shape they did the wind tunnel tests with just the bike and a design envelope of "up to 186mph". Even the track-biased H2R with it's wings generating front downforce for cornering, while not being speed restricted, wasn't designed for higher speeds. It all changes when you put a rider aboard who wants to go Land Speed Racing and if that rider is average sized there's nowhere to hide.
The front fairing is low and narrow, meaning your shoulders are out in the wind blast. The bike is also short and elbows and knees are vying for the same space, meaning you cannot tuck in as well as on some other bikes. I don't think that removing the plastic tail piece makes much difference at all, I've tried it with and without. It's not the same as the long-tail fairings you see being used on the Hayabusa for LSR.
Look at the attached image of me at +200mph. Look at the shoulders of my leathers, armoured and still pushed right in by the force of the wind. I can't get any lower as my chest and the chin of my helmet are on the tank and I can't get my arms in a bit more because my knees are there. This is the best tuck I can manage on an H2 being of "normal" size. (5' 10")
The biggest obstacle to the H2 going faster is aerodynamics. I'm not theorising, I speak from the experience of the last three seasons of LSR on one. I do agree about the H2R wings though, I beat one last weekend by a margin and he had a lot more power, a claimed 290bhp at the wheel.
Go Fast Or Go Home
Last edited by BobC; 08-22-2018 at 09:28 AM.