|home >  Portfolio >  Cycler >  Stability tests||15 March 2009|
All measured horizontally at Shelley's neck level, 39inch (1m) with Shelley on a flat floor.
Measured with all covers on unlike the photographs.
All measured with a spring-balance which only goes up to 14lb.Forward - well over 14lb, maybe 20 - 25lb
Sideways -a lot more than 14lb, maybe 30+ lb
Backwards - 7lb going up to 11lb as soon as the rear 'trolley wheels' hit the ground.
Diagonally - a lot more.
Shelley carrying 56lb (~25.5Kg) at maximum forward and backward extensions for stability.
Note Shelley weighs 32.5Kg with batteries and covers and so is carrying over 3/4 of its weight.
Front ~9.25inch, Back ~5.75inch from body centre line
• 1:12 Slope (Or 8.3%, 5 degree incline)
- The ADA recommended slope for commercial and public access ramps.
- Works for most manual chair users unassisted.
• 1:8 Slope (Or 12.5%, 7 degree incline)
- Most unassisted manual chair users can use on short ramps.
• 2:12 Slope (Or 16.7%, 9.5 degree incline)
- OK for most portable ramps.
- An able assistant required for those unable to power themselves.
OK for strong, unassisted manual chair users.
Data from http://www.wheelchairramps.com/resources-chart.htm
• 3:12 Slope (Or 25%, 14.5 degree incline)
- Stability a concern.
- Clearance under scooter at top of ramp needs to be considered.
- Works for lightweight chair/user with strong assistant.
- Works for loading unoccupied power chairs and scooters.
- Only the strongest unassisted manual chair users can use on short ramps.