Movement speed in drake
Not sure how to best incorporate this info, but with drake armor and minimum encumbrance, speed on flat cobblestone is 15.70 km/h. With a great helm instead of the drake cap, speed is 14.18 km/h.
Shoulder pads do not appear to affect speed.
I think that info would be better on the drake pages, as armour pages have explanations of these speed differences. This page has no reference to how the different armour types affect speed. Also, combos of 2 different types of armour (though this may be more common) don't necessarily need to be explained, since that would open the door to listing what a drake jacket + plate pants + leather boots + cloth gloves.... :)