FedEx has a new aero package for the GP this weekend

"415s30 W123TSXWaggoIIIIIIo ( •_•))°)" (415s30) 10/10/2020 at 00:25 • Filed to: FedEx

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I’ve always wondered how much this does.

pip bip - choose Corrour > 415s30 W123TSXWaggoIIIIIIo ( •_•))°) 10/10/2020 at 00:35

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extra mpg!

boredalways > 415s30 W123TSXWaggoIIIIIIo ( •_•))°) 10/10/2020 at 00:40

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Coefficient of drag down to .81

pip bip - choose Corrour > boredalways 10/10/2020 at 00:43

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lol

415s30 W123TSXWaggoIIIIIIo ( •_•))°) > pip bip - choose Corrour 10/10/2020 at 00:44

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It must be worth something to make that, at what speed? I’d love to see the data.

Distraxi's idea of perfection is a Jagroen > 415s30 W123TSXWaggoIIIIIIo ( •_•))°) 10/10/2020 at 00:53

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You might find it’s got more to do with spray reduction than mpg - it’ll reduce the low pressure area on the side of the cab so less spray  will be sucked up from the wheel arch.

415s30 W123TSXWaggoIIIIIIo ( •_•))°) > Distraxi's idea of perfection is a Jagroen 10/10/2020 at 00:55

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Yeah I was having a hard time believing it could make the MPGs that much better, maybe they found the design caused an effect in the rain. 

pip bip - choose Corrour > Distraxi's idea of perfection is a Jagroen 10/10/2020 at 00:58

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makes more sense than my nonsense. 

pip bip - choose Corrour > 415s30 W123TSXWaggoIIIIIIo ( •_•))°) 10/10/2020 at 00:59

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i think Distraxi is right 

barnie > 415s30 W123TSXWaggoIIIIIIo ( •_•))°) 10/10/2020 at 07:39

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Early ‘70s Ford Country Squire station wagons had a reverse wing above the back end, mounted to the roof rack . This was to direct air down to create turbulence rather than the vacuum behind it. Disrupted the airflow and aided gas mileage. This might be a similar thing discovered in a wind tunnel. With enough rum this makes sense .

So why are semi-trailers using that square cone thing instead of a wing? Bridge clearances?

Brickman > 415s30 W123TSXWaggoIIIIIIo ( •_•))°) 10/10/2020 at 09:22

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Nah, its a deer grater. Hit a deer and the fins slice the venison and gently places the meat on the side step.

:P

415s30 W123TSXWaggoIIIIIIo ( •_•))°) > barnie 10/10/2020 at 13:59

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A lot of vehicles had a wing that directed air down behind them, I had an S10 Blazer with one. I was born in the 70's but by the 90's even explorers had those sometimes in some trims. Someone once told me it was to clean off the back window with air as well. I’m not sure, this sounds like a job for Torchinski. 

barnie > 415s30 W123TSXWaggoIIIIIIo ( •_•))°) 10/10/2020 at 15:51

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Yea, that wagon was the 1st one I thought of. We took the wide taillights out of a Datsun 710 race car and left holes for air to pass thru. It did settle the car down a bit at speed on the twisties. Yes, this is a good subject for the Torch To uch .