Guinness World Record is 115 km/h, a blistering 72 miles per hour.
That's a stripped down machine made for "speed". Anything made for "work" is going to be considerably slower. Don't get me wrong, airships were an important stepping stone for aviation but none of them can compete with an airplane for utility.
lol, I worked in one (dangerous) shop where a common prank would be to wait for someone to be in thier hood, upend a large styrofoam coffee cup from the break room on the edge of someone's bench, fill it with aceteline from a torch and spark it.