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Total 19 documents matching your query.

1. Center of pressure? (score: 1): Author: "Keith Turk" <kturk@ala.net>; Date: Thu, 21 Apr 2005 06:26:15 -0500; I'm still trying to sort out how you guys are finding the center of pressure of your car. Keith; /html/land-speed/2005-04/msg00259.html (7,232 bytes)
2. Center of pressure? (score: 1): Author: "John Burk" <joyseydevil@comcast.net>; Date: Thu, 21 Apr 2005 09:51:41 -0400; I don't know where the center of pressure is for rectangular shapes but for streamlined shapes it's at about 25% back from the nose . John Burk joyseydevil@comcast.net; /html/land-speed/2005-04/msg00261.html (7,483 bytes)
3. Re: Center of pressure? (score: 1): Author: "DrMayf" <drmayf@teknett.com>; Date: Thu, 21 Apr 2005 07:30:36 -0700; Is that right? CAn you tell me the source of this? I know model rocket builders sometimes us the string approach to finding the Cp But I don't think real missiles, real airplanes, real cars use that; /html/land-speed/2005-04/msg00262.html (8,818 bytes)
4. RE: Center of pressure? (score: 1): Author: Dale.Clay@mdhelicopters.com; Date: Thu, 21 Apr 2005 07:29:06 -0700; Way too many variables to make such a blanket statement ... Dale C. I don't know where the center of pressure is for rectangular shapes but for streamlined shapes it's at about 25% back from the nose; /html/land-speed/2005-04/msg00263.html (7,700 bytes)
5. Re: Center of pressure? (score: 1): Author: "Thomas E. Bryant" <saltracer@awwwsome.com>; Date: Thu, 21 Apr 2005 08:42:53 -0700; I realize that this can be a problem for you guys with steamliners! I know it isn't accurate, but I assume the windshield area to be the cp on real cars. This is what I used when reconfiguring my ca; /html/land-speed/2005-04/msg00264.html (8,137 bytes)
6. Re: Center of pressure? (score: 1): Author: John Goodman <ggl205@yahoo.com>; Date: Thu, 21 Apr 2005 08:55:53 -0700 (PDT); "In surface vehicles, you also need to account for the ground effects underneath the car." Mayf, thanks for pointing out this very important feature. As LSR types, we forget that Cp can be effectivel; /html/land-speed/2005-04/msg00265.html (9,274 bytes)
7. Re: Center of pressure? (score: 1): Author: "Keith Turk" <kturk@adelphia.net>; Date: Thu, 21 Apr 2005 11:58:12 -0500; Tom your answer is as good as any so far.... Don't know how accurate it is... but your dealing with real effects of making a change and comparing it to a known condition... bottom line is that your e; /html/land-speed/2005-04/msg00266.html (9,270 bytes)
8. Re: Center of pressure? (score: 1): Author: "Thomas E. Bryant" <saltracer@awwwsome.com>; Date: Thu, 21 Apr 2005 10:21:30 -0700; Much too deep for me, I am just a simple guy...I hope to also be measuring downforce/lift at each end of the car this year. That is, if I ever get it back together again. I have a habit of losing pa; /html/land-speed/2005-04/msg00267.html (9,887 bytes)
9. RE: Center of pressure? (score: 1): Author: "Albaugh, Neil" <albaugh_neil@ti.com>; Date: Thu, 21 Apr 2005 16:17:17 -0500; As an example of moving the CP rearward to enhance high-speed stability, take a look at Rex Svoboda's beautiful blue McLaren modified sports. The additional rear fins move the CP further to the rear; /html/land-speed/2005-04/msg00271.html (9,507 bytes)
10. Re: Center of pressure? (score: 1): Author: "Jim Dincau" <jdincau@qnet.com>; Date: Thu, 21 Apr 2005 14:46:25 -0700; Here is what an aero engineer at Lockheed told me. What you want to know is the lateral center of pressure (as in Yaw). Take a picture of the car from the side with a telephoto from enough distance; /html/land-speed/2005-04/msg00272.html (8,689 bytes)
11. Re: Center of pressure? (score: 1): Author: "DrMayf" <drmayf@teknett.com>; Date: Thu, 21 Apr 2005 17:02:47 -0700; Ughhh, tilt. That method may work for a model rocket but it does not account for the upper surfaces of the car nor those under the car nor the accounting for spoilers. mayf,out in Pahrump. -- Origina; /html/land-speed/2005-04/msg00276.html (9,256 bytes)
12. RE: Center of pressure? (score: 1): Author: "Dave Dahlgren" <ddahlgren@snet.net>; Date: Thu, 21 Apr 2005 21:28:16 -0400; Oh SH*T the Weather Vane Theory is back.. personally I like the hammer and arrow one better LOL.. All serious aero work is based on weather vanes hammers and arrows. I got this bridge and you look li; /html/land-speed/2005-04/msg00279.html (10,407 bytes)
13. RE: Center of pressure? (score: 1): Author: "J I Waldron" <jwaldron47@earthlink.net>; Date: Fri, 22 Apr 2005 07:46:22 -0400; Would a fin actually move the CP when the car was running straight? Or do they only change the CP should the car get a little sideways? (Which, of course, is the point) Thanks, Jim W.; /html/land-speed/2005-04/msg00290.html (8,893 bytes)
14. Re: Center of pressure? (score: 1): Author: Nt788@aol.com; Date: Fri, 22 Apr 2005 09:57:20 EDT; Stick a pin in a cardboard profile and blow? Jack; /html/land-speed/2005-04/msg00292.html (8,164 bytes)
15. Re: Center of pressure? (score: 1): Author: "DrMayf" <drmayf@teknett.com>; Date: Fri, 22 Apr 2005 07:01:12 -0700; Because the fin is an airfoil, it has it's own center of pressure and so yes, it contributes and moves the overall Cp backwards, unless of course the fin is up front.; /html/land-speed/2005-04/msg00293.html (9,162 bytes)
16. Re: Center of pressure? (score: 1): Author: Nt788@aol.com; Date: Fri, 22 Apr 2005 10:00:03 EDT; REALLY ??!! Jack; /html/land-speed/2005-04/msg00294.html (8,065 bytes)
17. Re: Center of pressure? (score: 1): Author: Bryan Savage <b.a.savage@earthlink.net>; Date: Fri, 22 Apr 2005 08:45:40 -0700; I have no idea Jim. I know that when they added the big fin to the Danny Boy streamliner it went from a very twitchy car that crashed twice to one that is so stable that it is almost boring to drive.; /html/land-speed/2005-04/msg00298.html (8,055 bytes)
18. RE: Center of pressure? (score: 1): Author: "Albaugh, Neil" <albaugh_neil@ti.com>; Date: Fri, 22 Apr 2005 11:58:58 -0500; A vertical fin on the back will not generate any lateral force until the car starts to yaw; if tire forces are neglected (can't really do this in practice), the car will rotate around its CM but the; /html/land-speed/2005-04/msg00302.html (9,393 bytes)
19. Re: Center of pressure? (score: 1): Author: "John Burk" <joyseydevil@comcast.net>; Date: Fri, 22 Apr 2005 14:57:03 -0400; Jack's "hang it from a string and blow" post inspired me to drill a row of small holes down the middle of a 18" three dimentional wooden model roughly like my streamliner that I made a few years ago; /html/land-speed/2005-04/msg00306.html (8,537 bytes)

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