Gt-12

[gwaii]

well, the aerodynamics are hard to judge...

a brief discussion on aerodynamics,and why it's not too hard to make some broad assumptions about the drag of a particular item.

there are three key items that determine the drag.the main one is frontal area,or how big a hole you need to punch through the air.

second is the aspect ratio,or how long the item is relative to it's frontal area.a quarter travelling face on into the wind will have more drag than a roll of quarters the same way,even though the frontal area is the same.
a dime,on the other hand will have less drag than the roll of quarters,because it has significantly less frontal area.

the third important factor(but the one that tends to get the most attention as it's the main one we have control over)is the shape.shape the ends to a point and curve the middle and drag will decrease further.

coefficient of drag is a term we often hear...this is simply the ratio of the drag presented by a flat surface of a given area divided by the actual drag of the item being tested with the same frontal area.so a smaller item with a high drag coefficient will have less overall drag than a larger item with a low coefficient.

having said that,the frontal area of a fullsize truck(my f350)is 5472sq''.

the frontal area of a ranger is 4096sq''.

the frontal on the gt is 2016sq''.....so we can see right off the bat it's not punching a very big hole through the air.
it's also pretty long for it's frontal size,and before i stuck the carbs through the hood,had a pretty slippery shape.the perfectly smooth bottom doesn't hurt either.

while i can't give solid numbers on it's overall drag,i can be pretty certain that the gt will be more aerodynamic than a ranger with more than twice the frontal area.

 

[7.5L_STX]

JK, i pretty much got what you said lol, its just a lot to read and understand.

 

[gwaii]

JK, i pretty much got what you said lol, its just a lot to read and understand.

yah,and that's just touching on the very basics...wait till you get into boundary layers and turbulence,and conservation of sectional area.

 

[RatDog8o8]

So.......bottom line is.......
"Get in, sit down, be quiet, and hold the flock on!!!"

 

[gwaii]

So.......bottom line is.......
"Get in, sit down, be quiet, and hold the flock on!!!"

ya,that pretty much covers it

 

[COPPERHEAD85]

Geez Doc...........Your melon should be the size of a beach ball.........Your one smart cookie!

 

[TheTopher]

Hey Gwaii, just by chance I managed to score 4 bottles of my favorite vodka today. (It's been discontinued for years)

I'm gonna save you one, when you finish the car I'll mail it out and you can celebrate properly.


Here's a link to the story of how I got it.

http://www.therangerstation.com/forums/showthread.php?p=927875#post927875

 

[gwaii]

so i laid up the final layers this morning,and now it's set up.

i'm a little worried about one thing...the gelcoat wasn't fully set up when i started laying glass yesterday,but it was about to get dark so i figured i'd chance it.this morning i noticed on the ends of the airdam there was some wrinkling of the gelcoat under the glass,but i had no way to tell just how far under it went without pulling everything up.
so i had a decision to make-do i hope it doesn't go too far and carry on,or pull everything off now when i can probably save the plug still,and start over.

i decided to chance it,time will tell if i made the right decision.


on that note,it's february second today,so i guess it's time for the monthly report.

that's 5 months since i started,my goals for this month are mostly sheet metal oriented.
i want to have all the metal work on the hood done by the end of the month and the new airdam done.
there's also the rear wheelwells to finish,as well as the trans tunnel.

there will be other things as well,but these are on the must-get-done list.

 

[gwaii]

Geez Doc...........Your melon should be the size of a beach ball.........Your one smart cookie!

mmmmm.....cookies

Hey Gwaii, just by chance I managed to score 4 bottles of my favorite vodka today. (It's been discontinued for years)

I'm gonna save you one, when you finish the car I'll mail it out and you can celebrate properly.


Here's a link to the story of how I got it.

http://www.therangerstation.com/forums/showthread.php?p=927875#post927875

sounds cool!

i'd be able to toast you virtually

(i'm not really sure if you can send that in the mail,though)

 

[TheTopher]

mmmmm.....cookies



sounds cool!

i'd be able to toast you virtually

(i'm not really sure if you can send that in the mail,though)

I'll figure it out. If I need to I can just over stuff a flat rate box or something and tell them it's baseball cards.

 

[gwaii]

I'll figure it out. If I need to I can just over stuff a flat rate box or something and tell them it's baseball cards.

sweet....got any early babe ruth cards to stuff in there?


well,all's good

it turned out good-the wrinkles didn't go in very far...less than an inch.

you can see here what i'm talking about.not a worry.

 

[Boggin]

nice work gwaii

 

[gwaii]

nice work gwaii

thanks...i'm pretty relieved at this point.still got some cleanup,trimming and bracing to do,but i'll be able to lay up a part in no time.

here's the celophane-like stuff that was mentioned before.it's the dried pva.

and this is some of the typical sort of damage that happens to the plug on removing the mold.this is why there's some anxiety at this point...it's a one-shot deal.

 

[--weezl--]

nice! so now you just need to fix the wrinkles, make sure that there's no no dips or anything caused by airbubbles, and lay in some fiber?

 

[martin]

I'm glad that turned out well, looks good. Is the mould reasonably rigid or are you planning on adding some bracing to it.
I'll add a comment the aerodynamic discussion. the flat floor will probably make up for the carbs sticking through the hood.