|
racergeo
|
 |
« on: May 26, 2009, 01:56:21 AM » |
|
The rule book says all cars must have adequate brakes. On a lakester, would a rotor on the diff. pinion with two calipers on it be considered adequate. I have 2 parachutes for my main braking. Any ideas? Thanks George
|
|
|
|
|
Logged
|
|
|
|
Dr Goggles
Hero Member
 Offline
Age: 161
Location: Melbourne Australia
Posts: 1764
The Jarman-Stewart "Spirit of Sunshine" Bellytank
|
|
« Reply #1 on: May 26, 2009, 02:14:08 AM » |
|
......if it slows the car it would fit the "spirit of the rules" , we have only passive drums on the back of the tank and without suspension they are in the realm of "vestigal" but they are legal, really they are all we need because pulling the car up from first gear speeds is the only job they are called upon to do,usually. If you are planning on running tarmac I'd be going for something that really worked, with the ignition off and both feet on the pedal a hundred mph seems really fast when the airstrip that they're still using ...that crosses the one your on is fast approaching........( not that that happened to anyone we know......  ) hope yr well GEO.......... |
|
|
|
|
Logged
|
|
|
|
Glen
Global Moderator
Hero Member
 Online
Age: 76
Location: South West Utah
Posts: 5130
SCTA/BNI timer 1983 to 2004,Semi Retired,.
|
|
« Reply #2 on: May 26, 2009, 09:26:23 AM » |
|
What happens if the pinion shaft breaks, and it has happened. I have seen a couple of cars with pinion mounted systems.
|
|
|
|
|
Logged
|
Glen  South West, Utah |
|
|
mkilger
Hero Member
Offline
Age: 42
Location: Riverside ca
Posts: 954
|
|
« Reply #3 on: May 26, 2009, 10:58:02 AM » |
|
how fast do you plan to run?? our roadster has 13in rotors and big 4 piston calbers by stanless steel brakes, this should stop the car at El mo if we happen to lose the chutes, bonneville unless we are headed for the tower or the dike we should be ok with the chutes.
|
|
|
|
|
Logged
|
|
|
|
The wonderful One
Newbie
Offline
Posts: 33
|
|
« Reply #4 on: May 26, 2009, 12:00:50 PM » |
|
Anyone remember when Hover had no chute at the lakes in a liner. Good brakes help. My openion is that all cars that can run 275 + should have carbon. Consider that cast iron starts to flow at about 1400 degrees. TWO
|
|
|
|
|
Logged
|
|
|
|
DallasV
Sr. Member
Offline
Age: 44
Location: Bountiful, Ut
Posts: 430
|
|
« Reply #5 on: May 26, 2009, 12:09:31 PM » |
|
My interpretation of the rule: It's your arse in the car, if something goes wrong what is adequate to you? Remember clinching your cheeks don't slow the car down any, trust me I've tried
|
|
|
|
« Last Edit: May 26, 2009, 12:58:18 PM by DallasV »
|
Logged
|
Records or parts, I didn't come all this way not to break something.
|
|
|
McRat
Hero Member
Offline
Age: 52
Location: Norco CA
Posts: 1431
Diesel Hotrodder
|
|
« Reply #6 on: May 26, 2009, 01:19:05 PM » |
|
I've found is that velocity is cruel. My trucks have huge brakes which work excellent for 50,000mi+ when slowing down 20,000lb plus at 70mph (towing trailers). But at 130mph unladen, the rotors will turn purple and get radial cracks, something I haven't seen towing. Since weight isn't much of a handicap, I'd be reluctant to skimp on them.
The main concern with me would be a fire situation. I would want to get stopped very rapidly so I would have time to run to the pits and get a bag of marshmellows and a stick before it goes out. Parachute + good brakes should haul me down far quicker than a chute alone.
|
|
|
|
|
Logged
|
Pat and Kat McSwain - DT 1616 "Casper" 2005 GMC 2500HD Sierra 4x4 Duramax Diesel + Allison Transmission B/DT & A/DT record holder, El Mirage (163) & Bonneville (175) Best clocking 197.068 mph - Bonneville '09, 2.25mi www.duramaxdiesels.com |
|
|
|
jl222
|
|
« Reply #7 on: May 26, 2009, 01:22:00 PM » |
|
My interpretation of the rule: It's your arse in the car, if something goes wrong what is adequate to you? Remember clinching your cheeks don't slow the car down any, trust me I've tried
The 222 car has 4 wheel brakes which came in handy once when the cylinder head melted into a water jacket and blew a water hose off [ supercharging wrong part of engine] This resulted in instant fogging of window and me not seeing a thing at 265mph. I pulled both chutes and slammed on brakes, the course steward said he couldn't believe how fast I stopped. As I've posted before my cousins had rear only brakes on their solid suspension Studebaker and Ed applied the brakes once and '' hell their not working'' they were working but just sliding. Try stopping a bike fast with rear brakes only. JL222 |
|
|
|
|
Logged
|
|
|
|
|
fredvance
|
|
« Reply #8 on: May 26, 2009, 01:36:29 PM » |
|
On the salt I used transmission and "air brakes" mostly and at Goliad mostly front brakes.
|
|
|
|
|
Logged
|
WORLDS FASTEST PRODUCTION MOTORCYCLE 213.470
Vance&Forstall Racing
All 9 SCTA 1350 NA records
WOS 2011 235+MPH
Engine by Knecum, Tuned by Johnny Cheese.
Sponsers Catalyst Composites, Johnny Cheese Perf, Knecum Racing Engines, Murray Headers, Carpenter Racing
|
|
|
John Burk
Sr. Member
Offline
Age: 71
Location: Hainesport , New Jersey
Posts: 384
|
|
« Reply #9 on: May 26, 2009, 01:59:18 PM » |
|
Don't use cast ductile iron rotors on the pinion . Their burst rpm is in the mid 4000s .
|
|
|
|
|
Logged
|
|
|
|
|
Jonny Hotnuts
|
|
« Reply #10 on: May 26, 2009, 07:19:04 PM » |
|
For ultra high speed vehicles anyone ever experiment or consider a fluid breaking system?
Seems like someone could have something like a dry torque converter type device attached to a drive component unit that when pumped with fluid would cause progressive resistance slowing the vehicle without locking and shouldn’t melt at any speed.
I know this might be crazy....just seems to work in my head.
~JH
|
|
|
|
|
Logged
|
"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)
|
|
|
Seldom Seen Slim
Administrator
Hero Member
Online
Age: 64
Location: Skandia, Michigan
Posts: 7322
Nancy -- 201.913 mph record on a production ZX15!
|
|
« Reply #11 on: May 26, 2009, 07:58:41 PM » |
|
Wouldn't the energy show up as heat in the fluid? And therefore -- sorta -- the system could "melt" by reaching such a high temperature that the fluid becomes so thin that it won't offer much resistance.
Another idea -- how about the magnetic resistance braking system that Ed Shadle is using on the N A Eagle? No physical matter of any type. That seems pretty good.
|
|
|
|
|
Logged
|
Jon E. Wennerberg
a/k/a Seldom Seen Slim
Skandia, Michigan
(that's way up north)
2 Club member x2
Owner of landracing.com
|
|
|
DallasV
Sr. Member
Offline
Age: 44
Location: Bountiful, Ut
Posts: 430
|
|
« Reply #12 on: May 26, 2009, 09:46:06 PM » |
|
How about JATO bottles mounted backwards?
"this is an attempt at humor for those of you breaking out the rule book"
|
|
|
|
|
Logged
|
Records or parts, I didn't come all this way not to break something.
|
|
|
DallasV
Sr. Member
Offline
Age: 44
Location: Bountiful, Ut
Posts: 430
|
|
« Reply #13 on: May 26, 2009, 09:48:45 PM » |
|
Or a big reverse pitched prop? (That one is for you Noonan)
|
|
|
|
|
Logged
|
Records or parts, I didn't come all this way not to break something.
|
|
|
Peter Jack
Hero Member
Online
Age: 68
Location: Calgary, Alberta
Posts: 1652
|
|
« Reply #14 on: May 26, 2009, 09:50:41 PM » |
|
You'd have to fire them at just the right time or you might find yourself backing up as fast as you were going forward.
Pete
|
|
|
|
|
Logged
|
My avatar shows Tok, a 100# Alaskan Malamute.
He's the one who runs everything around here.
|
|
|
|
