This is me jumping a draft cross named Dale (definitely more draft than whatever the cross is). I only rode him a few times a year when we went to visit our family friend who managed this riding centre. At any rate, my mom and our friend decided they wanted to see just how high Dale could jump, and decided to use me as their guinnea pig. He had a slow, lumbering gate, but was relatively well balanced and did a surprisingly good job of getting his bulk nicely over a fence from good and bad spots.
We made it up to at least 3'6", which is pretty impressive for all the better he moved. It was lots of fun.
This is my horse Doc. The reason why the jump is so low is becuase it recently rained and the ground was soft so we didn't do anything high that day I think if you click on the link you can scroll down and see the pic.