Author Topic: BBarn and Robfreys A/BG liner  (Read 26824 times)

0 Members and 1 Guest are viewing this topic.

Offline robfrey

  • Hero Member
  • *****
  • Posts: 1206
    • carbinitelsr
BBarn and Robfreys A/BG liner
« on: November 28, 2009, 06:24:45 PM »
Well, you gotta start somewhere.









496 BGS
carbinitelsr.com
carbiniteracing.com
carbinite.com

Offline lvsalt

  • Sr. Member
  • ****
  • Posts: 581
    • http://www.dcwaterjet.com
Re: BBarn and Robfreys A/BG liner
« Reply #1 on: November 28, 2009, 06:56:21 PM »
Goodluck with your project :cheers:
Gary Cole     DCWATERJET Z

Offline robfrey

  • Hero Member
  • *****
  • Posts: 1206
    • carbinitelsr
Re: BBarn and Robfreys A/BG liner
« Reply #2 on: November 28, 2009, 07:06:03 PM »
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.
496 BGS
carbinitelsr.com
carbiniteracing.com
carbinite.com

Offline jdeleon

  • Jr. Member
  • **
  • Posts: 46
    • DELEON AUTO ACCESSORIES
Re: BBarn and Robfreys A/BG liner
« Reply #3 on: November 28, 2009, 11:05:39 PM »
I see your using Ashlar.... my favorite cad is cobalt.

Offline robfrey

  • Hero Member
  • *****
  • Posts: 1206
    • carbinitelsr
Re: BBarn and Robfreys A/BG liner
« Reply #4 on: November 28, 2009, 11:32:47 PM »
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.
496 BGS
carbinitelsr.com
carbiniteracing.com
carbinite.com

Offline Jonny Hotnuts

  • Hero Member
  • *****
  • Posts: 1522
Re: BBarn and Robfreys A/BG liner
« Reply #5 on: November 29, 2009, 12:34:44 AM »
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
jonny_hotnuts@hotmail.com

"Sometimes it is impossible to deal with her, but most of the time she is very sweet, and if you caress her properly she will sing beautifully."
*Andres Segovia
(when Im not working on the car, I am ususally playing classical guitar)

Offline stratman59

  • Full Member
  • ***
  • Posts: 280
Re: BBarn and Robfreys A/BG liner
« Reply #6 on: November 29, 2009, 08:33:08 AM »
Good luck guys  :cheers:

Just wondering why did you decide on a flat bottom

Robbie

Offline SPARKY

  • Global Moderator
  • Hero Member
  • ***
  • Posts: 6908
Re: BBarn and Robfreys A/BG liner
« Reply #7 on: November 29, 2009, 10:10:57 AM »
down force  :?
Miss LIBERTY,  changing T.K.I.  to noise, dust, rust, BLUE HATS & hopefully not scrap!!

"Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure or nothing."   Helen Keller

We are going to explore the racing N words NITROUS & NITRO!

Offline Dave Haller

  • Sr. Member
  • ****
  • Posts: 400
Re: BBarn and Robfreys A/BG liner
« Reply #8 on: November 29, 2009, 10:35:45 AM »
Looks like you and Brandon have been really busy. Stay in touch my friend and good luck with the build.

Offline lvsalt

  • Sr. Member
  • ****
  • Posts: 581
    • http://www.dcwaterjet.com
Re: BBarn and Robfreys A/BG liner
« Reply #9 on: November 29, 2009, 10:38:45 AM »
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.
Gary Cole     DCWATERJET Z

Offline bbarn

  • Sr. Member
  • ****
  • Posts: 618
Re: BBarn and Robfreys A/BG liner
« Reply #10 on: November 29, 2009, 11:08:40 AM »
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!  :-D

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.
I almost never wake up cranky, I usually just let her sleep in.

Offline robfrey

  • Hero Member
  • *****
  • Posts: 1206
    • carbinitelsr
Re: BBarn and Robfreys A/BG liner
« Reply #11 on: November 29, 2009, 01:44:49 PM »
Good luck guys  :cheers:

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.
496 BGS
carbinitelsr.com
carbiniteracing.com
carbinite.com

Offline robfrey

  • Hero Member
  • *****
  • Posts: 1206
    • carbinitelsr
Re: BBarn and Robfreys A/BG liner
« Reply #12 on: November 29, 2009, 01:47:29 PM »
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?
496 BGS
carbinitelsr.com
carbiniteracing.com
carbinite.com

Offline SPARKY

  • Global Moderator
  • Hero Member
  • ***
  • Posts: 6908
Re: BBarn and Robfreys A/BG liner
« Reply #13 on: November 29, 2009, 02:21:18 PM »
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 :-D!!!!!!!!!!!
« Last Edit: November 29, 2009, 07:49:46 PM by SPARKY »
Miss LIBERTY,  changing T.K.I.  to noise, dust, rust, BLUE HATS & hopefully not scrap!!

"Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure or nothing."   Helen Keller

We are going to explore the racing N words NITROUS & NITRO!

Offline robfrey

  • Hero Member
  • *****
  • Posts: 1206
    • carbinitelsr
Re: BBarn and Robfreys A/BG liner
« Reply #14 on: November 29, 2009, 02:37:49 PM »
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.
496 BGS
carbinitelsr.com
carbiniteracing.com
carbinite.com