ASC Regulation tl;dr
The occupant space by regs is defined by an 835 mm arc pivoting about a designated point. Nothing can be within this arc with the exception of the steering wheel, mirrors, and seats. When occupants are seated normally, with safety-belts and helmets on, no part of the occupant nor the full free range of motion of the occupant's head (with helmet) may extend beyond the occupant cell (defined as roll cage + structural chassis). For ASC there is no minimum amount of space between the occupant's helmet and the extent of the occupant cell. ( For WSC only, no point of any occupant’s helmet may lie within 50 mm of the convex hull)extents of the occupant cell.
By regulation, the minimum occupant cell size is based on a 50th percentile male (not including helmet space). Thus, as a team we have a say over who will be able to fit inside our vehicle.
Our Internal Goals for Sizing
We would like to accommodate as many different sized people as possible within our vehicle as we are shipping ourselves as a consumer-oriented passenger vehicle. The industry standard in automotive design is to comfortably accommodate 90 percent of the population ranging from 5th percentile female to a 95th percentile male (think bell-curve distribution of people ranging from small woman to large man). With that being said, we also need to design a competitive vehicle for competition, so comfort will be compromised (to some extent) to optimize vehicle efficiency.
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There is a special case that is a combination of the above 2 scenarios. During competition, our vehicle will be assessed on its "practicality" taking into account both scenarios. During this assessment we will have the opportunity for scrutineers to sit within our vehicle. This may include a test drive with the scrutineer(s) in the passenger seat and/or rear seats. For this test drive, the scrutineer(s) will have to wear a helmet and 5-pt safety harness.
Edit: The values within these 2 tables are only preliminary and are by no means correct
Range of Expected Occupant Size/ Weight
Front Seat | Rear Seat | |||
---|---|---|---|---|
Scenarios | Lower Bound | Upper Bound | Lower Bound | Upper Bound |
Race | 5' 5" (165cm) 130lbs (59kg) | 5' 11" (180cm) 176lbs (80kg) | 5' 0" (152cm) 100lbs (45kg) | 5' 6" (168cm) 176lbs (80kg) |
Showroom | 5' 0" (152cm) 100lbs (45kg) | 6' 5" (196cm) 240lbs (109kg) | 5' 0" (152cm) 100lbs (45kg) | 5' 11" (180cm) 176lbs (80kg) |
Practicality | 5' 0" (152cm) 100lbs (45kg) | 6' 3" (191cm) 220lbs (100kg) | 5' 0" (152cm) 100lbs (45kg) | 5' 11" (180cm) 176lbs (80kg) |
*Note that a helmet is not included in any of these measurements
Who We Can Accommodate
Front Seat | Rear Seat | |||||||
---|---|---|---|---|---|---|---|---|
Scenarios | Max Lower | Comfort Lower | Comfort Upper | Max Upper | Lower Bound | Comfort Lower | Comfort Upper | Upper Bound |
With Helmet | 5' 0" (152cm) 100lbs (45kg) | 5' 5" (165cm) 130lbs (59kg) | 5' 11" (180cm) 176lbs (80kg) | 6' 3" (191cm) 220lbs (100kg) | 5' 0" (152cm) 100lbs (45kg) | 5' 0" (152cm) 100lbs (45kg) | 5' 6" (168cm) 176lbs (80kg) | 5' 6" (168cm) 176lbs (80kg) |
Without Helmet | 5' 0" (152cm) 100lbs (45kg) | 5' 5" (165cm) 130lbs (59kg) | 6' 3" (191cm) 220lbs (100kg) | 6' 5" (196cm) 240lbs (109kg) | 5' 0" (152cm) 100lbs (45kg) | 5' 0" (152cm) 100lbs (45kg) | 5' 11" (180cm) 176lbs (80kg) |
Regulation Occupant Cell Size
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