Study: Optimal Design of an Ecofriendly Pickup Truck Overhang and Roof to Reduce the Drag Coefficient

[vteco]

Just found this interesting read:

https://www.mdpi.com/2076-3417/14/11/4667

downloading the pdf shows the illustrations better.

[vteco]

Just read it through, and I believe I'll try modding the top of the Silverado to incorporate the lead-in and out angles mentioned and put the max thickness at about a third of the roof chord.

[redpoint5]

The link isn't working for me.

One word of advice, take efficiency measurements before and after the mods so you have some idea of how much difference it made.

[ECO-AKJ]

Go look at Aerohead's build

https://ecomodder.com/forum/member-aerohead.html

[aerohead]

If you'll do a search for:
'Streamlined Toyota T-100 in the Wind Tunnel'
, there's 17-minutes we shot with smoke flow.
My cover isn't 'perfect', but the whole kit indicated Cd 0.255 with better mirrors, down from Cd 0.44.
25.14 mpg went s high as 39.9 mpg on the interstate.

[vteco]

Originally Posted by redpoint5

The link isn't working for me.

One word of advice, take efficiency measurements before and after the mods so you have some idea of how much difference it made.

Sorry, link in first post is now corrected.

[vteco]

Originally Posted by aerohead

If you'll do a search for:
'Streamlined Toyota T-100 in the Wind Tunnel'
, there's 17-minutes we shot with smoke flow.
My cover isn't 'perfect', but the whole kit indicated Cd 0.255 with better mirrors, down from Cd 0.44.
25.14 mpg went s high as 39.9 mpg on the interstate.

That was a cool watch!

[freebeard]

I'm perplexed. Can anyone explain their use of words like 'overhang length'? Figure 16 seems to be concerned with the 'windscreen' angle.

HotVWs magazine used to run an ad on the inside cover that showed Beetles racing in the rain and they all had rooster tails of water coming off the windshield. But the flat, upright windshield has a radiused header, especially the pre-1960s models, that compensated. Air has less mass.

[vteco]

They're referring to the relative length of the hood.

The angles they are talking about are the cabin top lead in and exit, and the other variable they were interested in was where the max camber of that cabin top would best be located, which seemed to be at about 30% of chord, among the models simulated.

[freebeard]

Thanks. I was expecting sun visors or something; 'max camber' is something I understand. I also have trouble with angles vs curves.

My idea of an ecofriendly pickup truck:

https://i.pinimg.com/originals/54/4c...db2ba92f00.jpg

Ecofriendly because antifreeze is poisonous to puppies and kittens.