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Old 09-12-2022, 11:43 AM   #12 (permalink)
aerohead
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aviation

Quote:
Originally Posted by redpoint5 View Post
I didn't watch, but I don't think aviation is a simpler frame for aerodynamics. The entire subject is extremely complex, perhaps with a few easy to remember "rules of thumb".

As with any subject, the basics are low hanging fruit, with mastery involving lifetime dedication and proclivity.
The thing about 'aviation' which sets it apart from road vehicle aerodynamics is that, the fineness ratios of fuselage, wings, and tail surfaces are typically so 'large' as to make flow separation impossible.
And in addition, virtually all fuselage have 'compound surfaces'.
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The Subaru remains a 'bluff' body, and pressure drag, which dominates total drag, is due the the intentional absence of the aft-body, which is responsible for the large wake's low base pressure.
The Subaru electric sibling ought to have significantly lower drag, due to a smaller radiator opening and a 'ideal' underbody.
Adding the same boat-tail to the BEV variant might boost battery range closer to 20%.
And optimizing the boat-tails' sides and bottom, push the improvement to over 20%.
AeroStealth and wife are leaving San Diego this morning, having spent the weekend at the 'Fully-Charged' BEV convention. We talked last night and he said no one presenting at the fair had any clue about aerodynamics and range.
This video could help stimulate a conversation.
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