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Happy to be corrected if I got the numbers wrong
Well, you got the function wrong at first pass, but I see you managed to correct that while I was composing my post :)
gbj_tester-
Yeah sorry.
I did it the oter way round. Assuming Area of 2.5 to get reasonable velocities, reducing cda by 0.2, which might be achievable (?). I'd save 4 ish hours, at 150 Watts, which would be around total average.
Perhaps it's worth it...
But then again, you can't be ve
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ry aero optimised, as position needs to be comfort first.
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And, does not bode well for my fluid mechanics exam tomorrow. Too many equations in my head.
skinny
Quick calculation as I'm busy, but with some rough numbers. Ignores drag from rolling resistance and gravity, but these would be negligible change.
Speed in m/s so 15mph is 6.7 m/s which is about my average speed. Assumed cdA of .28 reduced to .24 only gives a 9w saving, which is 0.04 is very optimistic. So 0.2 cdA reduction gives a saving of 4 Watts.
Happy to be corrected if I got the numbers wrong.