Aerodynamic streamline template - online tool (view streamlined extension on any car)

[KamperBob]

Originally Posted by radioranger

Great i was thinking of the possibility of doing a fairing in the other direction on the nose of my Ranger, it is very blunt and the rain on the top of the hood just sits there at highway speed. I was thinking something sort of like a forties car hood sitting on top of the one i have, sectioned of course or just a ships prow type of air dam, made of foam or similar with clear covers for the lights set at an angle, also in the theory angle , doesnt these extreme wing shaped extensions generate lift on the body of the car and isnt that what Pete Brock ran into with the Daytona Cobra coupe. not that we're going fast but just in theory ,

Someone else might disagree but I say don't bother. While blunt across the middle the leading edges are rounded with several inch radii. That's enough for attached flow which is the goal in front. (Going for more attached is like more pregnant.)

What make rear hood rain pause is eddy currents. That's high fruit to pick. You NEED visibility. A transparent hood blister would preserve safety. But you have to re-engineer wipers, etc. Your windshield-roof transition and A-pillar radii should still be generous enough for attached flow.

If you want to improve MPG, start at the back. That's the low hanging fruit to pick first. An aero cap is hard to beat. Several build threads show different approaches. Perfect is the enemy of good enough. A firm tonneau cover provides good bang for the buck. A partial tonneau (rear only) does (arguably) marginally better. Straight caps with a big square backs add drag (wake suction & eddy currents).

Good luck. Good on you for doing homework first. Be sure to report your mods and results. Maybe we'll learn something too.

[ECONORAM]

I am 0 for 2. Can't find a level picture of my truck, and Safari doesn't seem to work with the template. Didn't work with Windoze Xp either. I can find the picture on my computer then nothing seems to happen?

[2000neon]

I'll give it a try:


I'm not sure if that's the same truck and ride height as your's though.

NOTE: I don't think that the picture I used is dead level, the rear tires seem to be a little bit off of the ground plane for the template. I would also appreciate a second opinion on where the max roof camber is. It seems to be above the B pillar to me, but certainly not obvious.

[Xist]

Originally Posted by 2000neon

NOTE: I don't think that the picture I used is dead level, the rear tires seem to be a little bit off of the ground plane for the template. I would also appreciate a second opinion on where the max roof camber is. It seems to be above the B pillar to me, but certainly not obvious.

Scrolling until the tires are at the bottom of the page shows that the tires are not level. I rotated 0.6°. How about this:

[seifrob]

version 0.6 a out

- two templates, one for side view, second one is usable for determining shape in plane view as seen here: http://ecomodder.com/forum/showthrea...tml#post116820

(note that template is used in wrong way)

any suggestions, bug reports etc welcome.

[RandomFact314]

This looks pretty good eh?

[radioranger]

I compared my early ranger to a later one and the rounded all the front pieces on the car every part pretty much, so bit of work to do there,for now keeping speeds under 50 unless traffic says otherwise, and I made a bumper sticker for the back that reads, Happy People Don't Speed, lol , pretty funny results since every body wants every one else to think they're happy, people cruise right up to me read it and back off, course there's always the guy or girl that's PO'd , I figure at least I'm warning them , had lots of good comments on it from the neighbors,

[KamperBob]

Originally Posted by radioranger

I compared my early ranger to a later one and the rounded all the front pieces on the car every part pretty much, so bit of work to do there,for now keeping speeds under 50 unless traffic says otherwise, and I made a bumper sticker for the back that reads, Happy People Don't Speed, lol , pretty funny results since every body wants every one else to think they're happy, people cruise right up to me read it and back off, course there's always the guy or girl that's PO'd , I figure at least I'm warning them , had lots of good comments on it from the neighbors,

For my RV bumper I want the one that says "Back off or I'll flush!" LOL

Most tailgaters I see these days are cell phonies. I found that hazard lights seem to snap 'em out of their funk. It's like "OMG a camper going slower than a John Deer hauling manure; I don't wanna be stuck behind this slowpoke; punch it, Margaret."

Help me condense this to crisp effectiveness so we can get it printed and into circulation. "Caution: sticky brakes. How low's your deductible?" Or something along those lines...

[Xist]

Originally Posted by KamperBob

"Caution: sticky brakes. How low's your deductible?" Or something along those lines...

In Arizona, if you rear-end someone, you are legally at fault, so how about a warning like "Why don't I hit my brakes so you can buy me a new car?"

[ECONORAM]

Originally Posted by Xist

Scrolling until the tires are at the bottom of the page shows that the tires are not level. I rotated 0.6°. How about this:

Xist and 2000neon--Thanks! That's my truck. I could pencil in the topper...I think.
Seeing this against the template, I find it interesting to discover the cab is contoured to match the curve. I always wondered why they didn't make it flat horizontal... This picture is the wrong direction, and a bit nose down, but you can see the roof curve and the flat topper. And I believe you are right 2000neon, the max camber is at the B pillar, or maybe right next to it?