Square Wheels in Strathpeffer usually has 2 or 3 ordinaries (Penny Farthings) sitting outside. Offer cake and biscuits and you may get a go on one 🙂
The roads at the times of the ordinary were the sort of thing we would buy a mountainbike or hybrid for now, so they were obviously capable enough. There are plenty of pictures of ordinary riders doing technical stuff, but there was a higher level of gymnastic skill required to ride an ordinary in difficult conditions.
To get a high gear required a big wheel, so long legs were an advantage. Gearing was of course the big restriction, and the safety cycle was introduced before gears became commonly available on ordinaries.
Nowadays you can get a Schlumpf gear hub for unicycles and this would have been ideal for the ordinary because a much smaller wheel could have been used.
One of my current projects is this:
The idea is to have it as safe to ride as a conventional bike. At the moment it is somewhat tricky to steer at low speeds. Further development will happen once my garage reconstruction is completed. (I'll build a new frame and forks instead of adapting them). Once it's working I may splash out on a Schlumpf hub.
The intention is to take it around the 'Puffer course, but it's a long way from that at the moment. 🙂
I was hoping to have it ready for the SSUK but my garage disintegration stuffed that.