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RE: Genesis results

by Arthur Middleton home :: Rate this Message:

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>Have just received my wind tunnel results from Southampton University, and
>no big suprises;
>The basic shape is stable at all speeds up to 100+mph and there is a very
>small amount of negative lift at speed.
>
>When we had finished the tests we ran the tunnel at increasingly  faster
>speeds, and the bike stood up well. We were way over 100+ when we sucked  a panel
>out of the ceiling and had to call a halt to the testing.......
>
>As they have a full size tunnel, with rolling road, it has been suggested
>that the best way to find the very best shape for an FF would be to make up a
>full size tube ladder chassis complete with front and rear wheels (then you can
> lengthen ot shorten it, as well.) suspend it from the ceiling, and just have
> bolt on front and rear panels, to test the wind flow effects.
>
>Sadly they can't replicate the sort of airflow you get on the M3 on a busy
>day, unless we all go and stand in the tunnel and move about..........only
>joking.
>
>Off to give a presentation to Transport for London on Wednesday about
>Genesis, and Southampton Uni next week, to talk to their grant finding people  and
>chief aero's guy, who knows.
>
>Ride safe
>
>Ian (P)

Well done. Now that sounds like a worthwhile test.

If one was to get CAD modelled forms CNC machined in something cheap like expanded
polystyrene, and fitted to a dummy chassis (or hollowed out to fit a real chassis), maybe
we could test our fairings before the time consuming bit of making finished fairings.

How much does wind tunnel time cost? I presume this was grant aided?

Arthur.




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