« Return to Thread: Re: Genesis results

RE: Genesis results

by Arthur Middleton home :: Rate this Message:

>--- In feet_forward@..., "Arthur Middleton" <artmidd@...>
>wrote:
>
>> ...I expect Roy's nArrow Streets to have significantly higher drag
>> than Genesis with 2 front unfaired wheels
>
>Who said the front wheels are unfaired?
>
>> and a larger frontal area.
>
>No it hasn't Arthur, about the same I would say.
>
>Roy

Are they fully covered? Is the frontal area of the fairings around the wheels included in
the frontal area calculation? Is the form drag from the outboard faired wheels accounted
for? Is the extra wheel aerodynamic drag accounted for? Is the parallelogram tilt linkage
faired?

One major drag contributor for motorbikes and bicycles is the front wheel. Mileage
marathon vehicles go to great lengths to cover the wheels down to the ground. The tilting
front wheels of STVs, and nArrow Streets, is going to have at least the lower half
uncovered so they can tilt and keep the brake discs cool. Two half covered wheels will
contribute more drag than one half covered wheel.

I ask to get an idea as to what can be expected from different formats of vehicle. If we
are interested in economy, we can just drive a little slower and put up with poorer
aerodynamic efficiency.

Note I didn't say the wheels weren't unfaired, just that "with unfaired wheels, etc."

Arthur.

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« Return to Thread: Re: Genesis results