- Mid wheel drive chairs
- Rear wheel drive chair with full differential steering
- Manual Wheel Chair
- These chairs pivot on a centered axis which gives the chairs a negligible increase to turn radius outside of the phycial size of the chair.
- a = width between front two wheels
- b = width between front and back wheels
- c = width between back two wheels
- tau = angle of wheel (estimated between 30 and 45 deg)
- Radius = b/sin(
$\psi$ ) + (a-c)/2
- w = Distance between front and back axis
- alpha = Degree of turn for front wheel
- R = Radius of front wheel
- R = W /
$\sin$ ($\alpha$ )
- y = Width between chair center and back wheel
- h = Width between chair center and front wheel
- g = Width between front and back wheel
- alpha = Angle of front wheel
- x = Width between front most part of chair to center back wheel
TD = 2 *
Detailed math -- Where the different wheel chair types image was pulled from
- This gives information to check if a hallway is wide enough for a wheel chair to do a 180deg turn
- Output will be the same units as the input. This will be predefined to be cm
- Wheel chair starts turn in center of door way
- Ideal turn angle is instantly achieved
- Wheel chair will be able to make a single turn into hallway without having to backup
STANDARD MANUAL WHEELCHAIR
- Total width: 64 cm
- Folded wheelchair width: 24 cm
- Seat width: 46 cm
- Rear wheel diameter: 58 cm
- Front wheel diameter: 20 cm
- Seat height: 49 cm
- Total wheelchair height: 87 cm
- Total length: 106 cm
- Seat depth: 40 cm
- Seat height: 45 cm