Yeah, since I last posted we have definitely hit 25 mph on occasion with the Chariot. She got over her fear of speed and now she likes to go fast. I mentioned this:
another thing that comes to mind is that, on the Chariot axle hitch at least (Burley uses a comprable hitch), the forward weight on the hitch caused by the bicycle's braking is taken up by the rubber clasp and the safety pin, and not any of the forged parts of the hitch. so while slowing gradually from a higher speed should never be an issue, braking quickly might lead to part fatigue and sudden failure...
to my husband and he agreed that it was possible there might be an issue there, but he thought it unlikely. We agreed that fast
curvy descents are probably a bad idea for a variety of reasons, though.
These days we go anywhere from 12 miles an hour to about 17-18, depending on the wind and who is pulling. She seems happiest at about 15-16 mph.