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> cool windscreens, how do you make em
usa4cheer
post Feb 16 2006, 06:35 PM
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I am working on my grassroots motorsport challenge car and want to take the windshield out of my car and want to do the mini windscreen. How do you make it???
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SirAndy
post Feb 17 2006, 01:02 AM
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QUOTE (alpha434 @ Feb 16 2006, 10:53 PM)
Now that's where I'm confused.

Is that .34 WITH or WITHOUT the flares?

no, with the flares it's like strapping two trash cans onto your quarter panels ... (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif)

btw. your tech-info listing was for a '69 914-6.
and the 914-6 did *not* have flares. i'd be interested to know what source that info came from ...

so, you really think flares would add more than 0.1 to the CD?
first of all, have you *ever* looked at a GT from the front?
i don't think so ...

the front is just as wide as the rear, so the rear flares don't add *anything* to the frontal area (which is how the CD is measured)

as you can see, the headlights add a whopping 0.017 to the CD.
now, correct me if i'm wrong, but looking at the headlights up compared to the curving of the flares, i'd say the headlights have *at least* the same surface area (frontal, remember?).

but even if we assume for a second that front flares are as "bad" as the open headlights, that would just add 0.017 to the base CD.

so, worst case, the GT would have a CD of 0.380. if that ...

unless of course, you were serious about those trash-cans ...
(IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif) Andy
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Posts in this topic
usa4cheer   cool windscreens   Feb 16 2006, 06:35 PM
Jeroen   you can just buy it from most vendors of fibreglas...   Feb 16 2006, 06:44 PM
d914   grassroots has a VERY small budget for building ca...   Feb 16 2006, 08:00 PM
alpha434   2006$ HOLY COW!!! If you can...   Feb 16 2006, 08:25 PM
davep   Why remove the windshield? My friends GT can run e...   Feb 16 2006, 08:32 PM
alpha434   Dave is right. To an extent. You are removing the ...   Feb 16 2006, 09:00 PM
SirAndy   ...   Feb 16 2006, 09:14 PM
one914racer   homemade   Feb 16 2006, 09:34 PM
Twystd1   Thomas.. I love that car.... That sucker is CLEA...   Feb 16 2006, 09:42 PM
alpha434   <...   Feb 16 2006, 09:42 PM
r_towle   So, a custom windscreen. Either you make a foam t...   Feb 16 2006, 11:15 PM
Aaron Cox   <...   Feb 16 2006, 11:28 PM
usa4cheer   WOW what a great response, it would have a taken ...   Feb 16 2006, 11:46 PM
alpha434   You get free weblog space with membership. ...   Feb 17 2006, 12:04 AM
alpha434   1969 Porsche 914/6 - Technical specifications This...   Feb 17 2006, 12:27 AM
Aaron Cox   that goes against everything ive heard.... ...   Feb 17 2006, 12:54 AM
alpha434   My numbers were WITH. That's what I've be...   Feb 17 2006, 12:59 AM
alpha434   Adding fender flares and increasing frontal profil...   Feb 17 2006, 01:00 AM
skeates   I hope that I can shine some light on the aerodyna...   Feb 17 2006, 01:01 AM
SirAndy   ...   Feb 17 2006, 01:02 AM
skeates   Andy - you are correct in saying that the frontal ...   Feb 17 2006, 01:15 AM
messix   i think an open cockpit would creat more drag than...   Feb 17 2006, 01:30 AM
redshift   With no back window, the vortex shit is all differ...   Feb 17 2006, 02:25 AM
Mugs914   <...   Feb 17 2006, 02:57 AM
URY914   Sounds like you guys work for NASA or something   Feb 17 2006, 07:45 AM
skeates   Thanks Mike, Yea, I got my CD mixed up with the e...   Feb 17 2006, 10:12 AM
SirAndy   <...   Feb 17 2006, 11:11 AM
airsix   I enjoyed the posts (such as Mike's) with good...   Feb 17 2006, 03:36 PM
marks914   Here is how you make a cut down windshield: The be...   Feb 17 2006, 03:55 PM
WRX914   if anyone would be willing to part with thier cut ...   Feb 17 2006, 04:00 PM
marks914   Has anyone here actually been in an automotive win...   Feb 17 2006, 08:48 PM
URY914   ...   Feb 17 2006, 09:07 PM
SirAndy   ...   Feb 17 2006, 09:21 PM
J P Stein   No, but I've been in a aeronautical wind tunne...   Feb 17 2006, 09:21 PM
marks914   <...   Feb 17 2006, 10:08 PM
airsix   ...   Feb 18 2006, 02:01 AM
usa4cheer   a guy ran a 914 with 2.3 turbo ford motor last yea...   Feb 18 2006, 02:43 PM
J P Stein  

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