Tags
Design, Economical production vehicle, Ergonomically, Front bracing member, inter collegiate engineering design competition, kill switch, Lateral diagonal bracing (LBD), Max vehicle dimensions, Rear roll hoop (RRH), Report ergonomics and aesthetics, Roll cage structure, Rules validity, Sae brazil, SAE Illinois, SAE Kansas, Sae korea, Sae south Africa, Secondary members, SIDE IMPACT MEMBER (SIM), Society membership, Technical requirements, The Baja sae competition, timulate real world engineering design, Vehicle, Vehicle ergonomic
Report ergonomics and aesthetics
The Baja sae competition originated at university of south Carolina in 1976 under the direction of dr john f Stevens
Objective
It is inter collegiate engineering design competition for undergraduate and graduate engineering students
To stimulate real world engineering design project and their related challenges.
Student must function as a team to design engineer, build, test, promote and compete with vehicle within the limits of the rules.
They must generate financial support for their project and manage their educational priorities.
Design
Each team goal to design and build a single seat ,all terrapins ,sporting vehicle whose structure contain driver.
Vehicle should be a prototype for reliable
Maintainable
Ergonomically
Economical production vehicle
Serves a user market
Vehicle should aspire market leading performance in terms of speed handling ,ride and ruggedness over rough terrain and off road condition.
Performance measured by success in dynamics events which are described in the baja sae rules and are subjected to events sites weather and course condition
Baja sae series 6 competition –
north America -SAE Kansas
SAE Illinois
SAE utep
Africa south America AND Asia –
Sae brazil
Sae korea
Sae south Africa
Official language
English , document submissions, presentation and discussion in English
Are acceptable at all competitions in the series.
Rules validity
Baja sae rules posted on the sae websites and dated for the calendar year of competitions are the rules in effect for the competitions
*(NOTE -rules set dated for other years are invalid)
Participation requirements
Student status
Team members must be enrolled as degree seeking undergraduate students in a college or university
Society membership
Team member must be member of sae affiliate society
Ata
I MECH E
VDI
Age
At least 18 years at time of EVENT driver license
Team members who drive should have driver license
Insurance
Individual medical and accidental issuance converge is required
Faculty advisor
Each team is expected to have a faculty advisory appointed by university
Faculty advisory – not to design any part neither fabricated nor assembled
Not to participate during technical inspection
Eligibility vehicle
Vehicle associated documentation must be conceived designed and fabricated by the team members without direct involvement from professional engineers faculty
*(NOTE -Vehicle which have been professionally fabricated may be disqualified from the completion)
(Vehicle fabricated from a kit or published design is ineligible to compete)
Technical requirements
Vehicle must have 4 or more wheel not in straight line.
Capable of carrying 1 person 75 inch
Weight 113 kg
Max vehicle dimensions
Width 64 inch with wheels
108 inch length
All terrain capability
Rough land
Obstruction such as rock
Sand jumps
Logs
Steep inclines
Mud
Shallow water
All above combinations
Any type weather including rain ,snow and ice,
Adequate ground clearance and traction
Vehicle ergonomic
Accommodate drivers of all sizes
95%male 5 % female
Largest driver must meet the roll cage clearance min clearance and fit in comfortable driving position while wearing entire required driver equipment.
Smallest driver to reach all vehicles
Required engine
Briggs and Stratton 10 hp
All vehicle use same engine a stock 4 cycle air cooled Briggs and Stratton ohv intake model
*(NOTE -modification not allowed)
(only original replacement parts to be used)
Starter– recoil starter rope may be extended to accommodate driver starting the engine while seated
Alternator-to generate electric energy available charging system include 3 ,10 20 amp system
Engine governor– engine equipped with a governor 3800 rpm or lower max speed
*(NOTE-any attempt to defeat the engine governor so to increase the engine speed is disqualified
to exceed 3800 rpm governor shielded from debris
Hybrid electrical system are prohibited )
Energy storage devices used for propulsion
Hydraulic accumulators are only type of stored energy device that should be incorporated into the vehicle for propulsion purpose
ITS Allowed compressed gas system to change transmission states but to provide addition car power
Electrical system
2 kill switch
Brake light
Reverse alarm
Reverse light
Battery power source
Battery – not leak even at roll over
non recharging batteries- only safety item to power like brake reverse light and alarm
kill switch –type (cockpit ) and external switch
(Outside kill switch Must not be below <_7 inch from THE top )
Driver equipment
Helmet neck support collar and goggles
*(Note –all drivers must wear a well fitting motocross style helmet with an integrated (one piece composite shell))
Chin /face guard and a rating of Snell m2005 sa 2005 british standard institution bs 6658-85 types a or a/fr .
*(Warning –some motocross Hemet have extended chin guards that will n9ot contact the required neck collars when the head is flexed forward ).
(This combination of helmet collar is prohibited)
Neck support /collar
All driver wear neck support /collar. The neck support must be full circle 360 degree and sfi 3.3 rated
*(NOTE-horse shoe collars are not allowed)
*(NOTE-the support collar must bear dated lables and show no wear ,cuts chaffing or wear )
Clothing
Driver must wear long pants socks shoes , gloves ,and a long sleeved fire resistant upper garments.
Upper garments must have factory label showing SFI RATED
Guards
All rooting parts belts and sprocket that rotate at the rate of the driver must be shielded to prevent injury.
Finger guards
Factory stock guards
FASTNERS
IT IS DRIVER RESTRAIN SYSTEM
a) FASTNER CAPTIVE-made of nylon locknuts , catered nuts or safety wired bolts , lock washer ,or thread sealants do not meet the requirement
b) fastener grade requirements –
c) Socket head cap screws
d ) modified fasteners
cockpit and throttle
a) protect the driver
b) permit easy driver exit in an emergency
Throttle controls-mechanical foot throttle controlled only.
Driver exit time is 5 sec after driver is fully seated with all protection
Firewall– it must be between cockpit and the engine and fuel tank apartment
it must be at least 0.020 inch thick
Splash shield for fuel tank
Body panels-made of plastic or fiberglass metal or similar material
Belly pan– minimum thickness 0.020 inch
leg and foot shielding–prevent driver legs and feet from coming in contact or becoming entangled during operation or failure . No gap more than 0.25 inch thick are allowed.
Fire extinguisher –mounted to rear roll hoop with metal tab at least 0.125 inch thick
Driver restraint
A) head restraint- must limit rearward motion of the driver head. Must be mechanical fastened to vehicle.
Minimum five strap system required – at least 5 point system
Lap belt and shoulder belt must be –3 inch wide
Fifth belt worn between legs to prevent the lap belt from riding up along the driver torso
Single metal to metal quick release lever
Material should be nylon or Dacron polyester
Vertical location– no lower than driver shoulders 4 inch
Belt below driver shoulder mount to the cockpit
Lateral spacing– 7-9 inch apart both end of shoulder
Harness attachment points-shoulder belt looped around the horizontal tube on RRH
Lap belts – at side view angle it must be at 45 degree angle and 65 degree of horizontal.
Centre line of lap belt at seat bottom should be approx 3 inch forward of bottom of the seat back.
6 points 7 points
Arm restrain
DRIVER arm must be kept within limits of roll cage spaceby use of arm restrain.
It should meet SFI 3.3 rating .
Must connect independently to safety belts.
Worn by driver just below elbow.
Driver must reach to cockpit kill switch and steering wheel but not out side cockpit .
Manufactures are required to ensure they labeled the belts with date of manufacturing.
Dynamics events points
Acceleration – 75
Hill climb – 75
Land maneuverability – 75
Rock crawl –
Suspension – 75
Endurance – 400
Total points – 1000
Note – kill switch and dynamic brake test
Inspection stickers
A multi inspection stickers will be issued inspection to each of the three parts of technical inspection in completed
Inspection sticker will be placed on right side of firewall above driver shoulder
- (Note -Self certification checks sheet – required)
a) Hill climb event
To measure vehicle ability to transmit excess (climbing) force to the ground
Relative ability to climb an incline from standing start or pull a designated object
Eg- vehicle or chain along a flat surface
*(Note – the organizer wil determine the hill height steepness and surface or object to be pulled )
B ) Maneuverability event – 60-75 points
To test vehicle handling ability over typical Baja terrain
Course may consist of varity of challenges
eg – tight turns , pylon maneuvers, ruts and bumps , drop offs , sand , rock , gullies, logs and inclines .
*(Note – each vehicle may make 2 runs for best time)
C) Specialty events
To test vehicle under unique off road condition
Rock crawl, mud blog , suspension
D) Endurance event
To check vehicle ability to operate continuously and at speed over rough terrain containing obstacles in any weather condition
E) Acceleration event
To measure vehicle come up speed quickly from standings start
Distance covered 30.48 m or 45.72 m flat
(NOTE -No. of attempts 2)
F) Sale presentation event
Convince the executive to produce the car at 4000 units per year
(NOTE -Max time 10 mins
5 mins question answer round
G) Cost event
a)cost report
b)prototype cost
Rearear
Rearear eRear Roll Hoop (RRH)
Roll Hoop Overhead Members (RHO)
Front Bracing Members (FBM)
Lateral Cross Member (LC)
Front Lateral Cross Member (FLC)
Secondary members
Lateral Diagonal Bracing (LBD)
Lower Frame Side (LFS)
Side Impact Member (SIM)
Fore/Aft Bracing (FAB)
Roll cage structure
Driver’s helmet shall be 6 inch from top
Body sides gap 3inch
Roll cage members not straight must not exceed =<28 inch
Should have angle less than or equal to 30 degree <=30 degree
Primary members
Rear roll hoop (RRH)
Can inclined up to 20 degree or less than 20 degree
Width minimum 29 inch or more from the axis of seat bottom which is above 27 inch
Roll hoop overhead members (rho)
MINIMUM 12 INCH OR MORE THAN 12 INCH
SEAT BOTTOM INTERSECTION WITH 4 INCH RADIUS CIRCLE WHICH TOUCHES THE SEAT BOTTOM AND SEAT BACK.
DIFFRENCE OF 41 INCH FROM SEAT TO TOP LC
MINIMIUM 41 INCH OR MORE THAN 41 INCH
Front bracing member (FBM)
ANGLE EQUAL TO 45 DEGREE OR LESS THAN 45 DEGREE
Lateral cross member (lC)
made of primary material
Front lateral cross members (fLC)
Secondary members
Minimum thickness- .35 inch
minimum outside diameter – 1 inch
Lateral diagonal bracing (LBD)
Must be equal to 5 inch or less than 5 inch from top and bottom
Angle between LDB &RRH minimum 20 degree or greater than 20 degree
LOWER FRAME SIDE (LFS)
SIDE IMPACT MEMBER (SIM)
IT SHOULD BE BETWEEN 8 INCH TO 14 INCH
FORE AFT BRACING (FAB)
EQUAL TO 5 INCH OR LESS THAN 5 INCH
Radius of steering -15 inch
Seat placed on the USM
Length of USM 35.190 inch
Gap between 2 USM is 5.435 inch
Base of the seat to be placed on is –18 (L) x 18 (B)
Width left from both the sides left and right after the seat is placed – 8 inch
Inclinations of seat should be equal to RRH inclination given
The base of seat support should be 2-3 inch above the USM
Seat. Bottom of the driver is at 14 inch with a
The lap belt should be placed at 15 or 14-1\2 inch of the
Or u can have 4 inch max down to shoulder height
5 point belt system
Belts width must be 3 inch wide or more than that
This is 6 point belt
the belts are made of the textile fibre polyester, and have special monofibres woven laterally into them. They act as small laminated springs and keep the belt strap flat. In this way, the load is distributed better over the entire width of the belt strap. The fittings and tabs are generally made of titanium. After an accident, it must be possible to rescue the driver together with the seat from the car if the emergency services think it necessary.lap straps can be either 50mm or 76mm wide
Lap belt tabs must be 0.090 inch thick
Tab must have minimum .25 inch width from edge and mounting holes to the outside edge of the tab
fastening point of the belts must be able to withstand a load of 14.7 kilonewtons
