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Author Topic: You've been doing car roof boxes all wrong  (Read 695 times)
Hero Member
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SW London

« on: March 25, 2020, 10:34:35 AM »

Turn it round the "wrong" way and it has lower drag than the "right" way!

3.06kWp SolarEdge system with a split array:
2.18kWp 10x South facing, plus 4x West facing 880W

Mk1 ImmerSUN DHW diverter
4kW PowerVault Battery

Tesla Model 3 Long Range
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« Reply #1 on: March 25, 2020, 12:52:00 PM »

Is it also a function of the roof box mounting points? The 'right' way has more overhang over the windscreen, therefore captures more air that will be squeezed between the box and the roof?

Thermal: 4x Schott ETC16
PV: 3.9 kWp (20xSchott Mono Perform 195Wp)
Boilermate Thermal Store
SMA SB400TL-20
Clearview Pioneer 5kW
Woodwarm 9kW
Windsmithy Arthur 6kW
1 anemometer (sadly no turbine)
Gareth J
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« Reply #2 on: March 25, 2020, 01:17:34 PM »

I went through this thought process when studying fluid dynamics. Lower drag; win. Potential lift created? Not so good.

I'm guessing manufacturers make this trade off.
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Officially "Awesome" because Frotter said so!

« Reply #3 on: March 25, 2020, 01:20:03 PM »

Just make it like a twin tip snowboard (same at either end) ..folk are always going to cram stuff in that doesn't fit via P.poor planning.

But he best thing for "packing needs" is a paper & pen to list rationally what you need, stick the paper in the luggage pocket, then work out what you didn't actually need, after all these years i'm still packing in this manner (either not listening to my own advice or improving upon it).

(as well as locating the local launderette that does a wash n' fold service)
« Last Edit: March 25, 2020, 01:24:50 PM by MR GUS » Logged

Austroflamm stove & lot's of Lowe alpine fleeces, A "finger" of Solar Sad
Noli Timere Messorem
Screw FITS
Leaf Owner (1st gen)
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