I see nothing that would indicate a diagonal split of the brake lines from
any of the rules you just listed. Right now the rules want two independent
brake circuits were all wheels will lock up. For safety reasons, the front
wheels normally lock slightly before the rear wheels lock but there can be a
steering advantage for really tight turns if your rears lock up first. Last
year at midwest the judge indicated that he wanted instant four wheel lock
up but I succesfuly explained to him why I didn't want that. I'm pretty
sure the rules don't say anything about the order in which the wheels lock
up and I hope they never do. Most people divide the brakes front to back so
they can easily balance the system for different situations but this almost
requires different size master cylinders and some engineering. I've seen
people divide the brakes from left to right in order to use the brakes for
added steering, handy for east water maneuverability. A left to right
divide is also nice since you normally use two master cylinders of the same
size but front to back bias is harder to adjust. I have no clue why someone
would want to do a diagonal split. With enough time and effort you can make
just about anything work but it doesn't mean you should.
Ebay has some really good deals on new helmets that meet the rules.
John
No longer on a team
>From: susantoa@pdx.edu
>Reply-To: susantoa@pdx.edu
>To: Mark Hagedorn <mark_hagedorn@hotmail.com>
>CC: mini-baja@Autox.Team.Net
>Subject: Re: Caliper Selection
>Date: Sat, 11 Dec 2004 22:41:11 -0800
>
>The diagonal split comes from the interpretation that two of the wheels
>must be
>able to be locked.
>
>
>2002 rules, page 30 of the pdf: same wording as 2003, shown below
>2003 rules, page 52 of the pdf:
>"51.2 Brake Test Pass/Fail Not Scored
>Mini Baja vehicles must be capable of braking in a straight line with at
>least
>two wheels locked.
>The brake test will consist of a team member driving the vehicle to the
>highest
>speed that can be obtained in a specified brake acceleration area then
>immediately applying the brakes to lock the wheels.
>If lock- up of at least two wheels is not demonstrated, or if the vehicle
>deviates from an approximately straight line, then the team must adjust or
>modify the brake system and have the vehicle re-tested until lock-up and/or
>straight braking is achieved."
>
>" 34.1 Foot Brake All vehicles must incorporate a foot operated braking
>system
>which is capable of braking at least the front or rear wheels and which is
>capable of locking the wheels on dry pavement. This braking system must be
>capable of stopping the vehicle within a distance of 15.24 m (50 feet) from
>any
>maximum speed as measured by radar, timing lights or organizers
>discretion."
>
>Other year rules:
>
>2004 rules, page 38 of the pdf, page number 31:
>"34.1 Foot Brake
>The car must be equipped with a braking system that acts on all wheels and
>is
>operated by a single foot. The brake system must be capable of locking ALL
>FOUR
>wheels in a static condition and dynamically on pavement.
>34.2 Independent Brake Circuits
>The vehicle must be have at least two independent hydraulic systems such
>that
>in case of a leak or failure at any point in the system, effective braking
>power shall be maintained on at least two wheels. Each hydraulic system
>shall
>have its own fluid reserve either through separate reservoirs or by the use
>of
>a dammed, OEM-style reservoir."
>
>2005 rules, page 37 of the pdf, page number 29:
>exactly the same wording as 2004
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