ASC Regulations on Sizing 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 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
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| Front Seat | Rear Seat | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Scenarios | Max Lower | Comfort Lower | Comfort Upper | Max Upper | Max Lower | Comfort Lower | Comfort Upper | Max Upper | |
With Helmet (will add +3 inches to standing/sitting height, extra height not shown in table) | 10% Female 5' 0" (152cm) 100lbs (45kg) | 50% Female 5' 4" (165cm) 130lbs (59kg) | 50% Male 5' 9" (176cm) 176lbs (80kg) | 5% Female 4' 11" (cm) 100lbs (45kg) | 5% Female 4' 11" (cm) 100lbs (45kg) | XX% Male 5' 3" (160cm) 120lbs (kg) | 5% Male 5' 45" (163cm165cm) 140lbs (kg) | ||
Without Helmet | 10% Female 5' 0" (152cm) 100lbs (45kg) | 50% Female 5' 4" (165cm) 130lbs (59kg) | XX% Male 6' 1" (XXcm) 220lbs (100kg) | 95% Male 6' 2" (193cm) 240lbs (109kg) | 5% Female 4' 11" (152cm) 100lbs (45kg) | 5% Female 4' 11" (152cm) 100lbs (45kg) | 50% Male 5' 9" (176cm) 150lbs (68kg) | 75% Male 5' 11" (175cm) 176lbs (80kg) | |
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