BBarn and Robfreys A/BG liner

[robfrey]

Well, you gotta start somewhere.

[lvsalt]

Goodluck with your project

[robfrey]

We will be water jetting many of the parts including the bulkheads.
Got a local guy here that is very reasonable and gives quick service.

[jdeleon]

I see your using Ashlar.... my favorite cad is cobalt.

[robfrey]

I see your using Ashlar.... my favorite cad is cobalt.

Wow, i thought i was the last person left on the planet to still be using this stuff.

[Jonny Hotnuts]

I would recommend a rounded lower section (not a flat bottom) for safety and to loose the the low pressure area (and drag) generated by attempting to keep air from going under the vehicle.


I would also suggest inline front wheels. In the event of a tire failure inline front wheels will allow for some degree of stability and the ability to control the vehicle where a side by side arrangement would cause the vehicle to pitch to one side.


-also-
The cheese wedge nose is only efficient at speed over 700 mph (check out the term "wetted surface area"). A more rounded nose will lower Cd and increase speed for the potential speeds achievable. My personal recommendation is to look at the D.Vesco nose on the 'nator or the nose on the BUB MC liner and take design aspect from these examples.

Good luck
~JH

[stratman59]

Good luck guys 

Just wondering why did you decide on a flat bottom

Robbie

[SPARKY]

down force 

[Dave Haller]

Looks like you and Brandon have been really busy. Stay in touch my friend and good luck with the build.

[lvsalt]

front end reminds me of the Brant and Wright liner, They are trying
to reach there goal of 200mph, Im not sure what your goal with the
car is, being an A/BG I would (GUESS) 300mph.

[bbarn]

Sparky,

This is just the first draft of the solid model to get into the virtual wind tunnel. We have about 40 days left on testing and design, once we start getting data we can determine if/what we need for down force modifiers.

Ivsalt,

Somewhere in the 300's would make me smile, somewhere in the 400's would make me happy! 

Dave,

This is all Rob's fault! If he would have never invited me over to "look" at the lakester, I wouldn't be doing this. Salt really effects people doesn't it, this must be what crack is like to a junkie.

[robfrey]

Good luck guys 

Just wondering why did you decide on a flat bottom

Robbie

Trying to get under the air and through it. Nebulous Theorem?
From what I understand, if you can't get a lot of air between bottom and the ground, it is best to none or almost none.
Please challenge me on this as all this aero stuff is new to me.

[robfrey]

down force 

Are you saying that it will make a lot of down force or are you asking me if it will and how much?

[SPARKY]

I was responding to the person who asked why you had a flat bottom---two reasons in my knowlege range---ease of construction and some down fore --- I am not second guessing you guys  by any means --I am no aero eng,---just a southern country boy who sold trucks !!!!!!!!!!!

[robfrey]

As far as the Flat bottom thing goes, I certainly don't know myself. I was thinking that we try a couple of shapes in the virtual wind tunnel and see what works and what we could construct.