The relative proximity of the Quickie XTR suspension to 90[degrees] at impact may explain why it was the best overall wheelchair in terms of ACC and FWACC transmission for all curb descent heights.
The two wheelchairs with the lowest impact angles, the Quickie XTR and the A-6S, had the lowest ACC and FWACC, followed closely by the Boing!
Interestingly, it remained one of the best wheelchairs in terms of FWACC, exemplifying the ability of the elastomers to reduce and/or properly shift low-frequency vibration.
Considering these results, we should note that FWACC became more important in the assessment of wheelchair suspension as curb height increased.
In terms of FWACC, the suspension wheelchairs maintained the smallest average magnitude.
This capability did not translate into a reduction in FWACC.