Tuesday, August 25, 2009

Freestyling on the Geezer Trike

I took Chuckette out for some riding on the geezer trike. This is something I’ve already done with Chuckette’s real life doppelganger (at least on the smooth pavement part of the ride, for a short while.) Riding the trail, where there’s no real traffic, with the baby nice and snug in a Baby Bjorn in front of me, seems pretty safe. Chuckette’s RL sister, in fact, slept peacefully throughout her 20 minute ride.

But, since I like data, I strapped Chuckette in and hit the trail a bit harder, to see what kind of G-forces would be generated on the smooth trail, as well as on the bumpy gravel stuff, where I rode a bit faster than comfortable.

 

As the scatter below shows, the G-forces generated even on the roughest part of the trail are really quite light. There was nothing above 3Gs, and only 8 samples above 2.5 Gs. Remember, you get 1 G for free just sitting still. You can see toward the right side of the plot that there are more samples, consistent with the bumpier surface, but the vast majority of these are less than 1.75 Gs.

trike ride chuckette in baby bjorn

Mean: 1.06
Median: 1.04
Max: 5.26
Minimum 0.04
Stdv 0.34
samples >2.5 Gs 8.00
consecutive samples > 2.5Gs 0

 

This is actually quite a bit less bumpy than Chuckette in the trailer, which makes sense because the entire system has multiple levels of shock absorption, starting with the tires, the sling seat, and then me. Moreover, Chuckette’s head couldn’t waggle much side to side, which cut out most of the possibility of contributing forces from that axis.

Here’s the trailer plot again.

trailer ride 1

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