Never really timed it, but it is a bit faster than the store bought one. The engine just idles. So it is really easy on gas. My father built it in the late 70's, early 80's? in his welding shop. The chassis is a Lincoln welding machine trailer. It has had Ford, GM, Mazda and Toyota engines on it. He used to lend it out to everyone so it always came back with engine issues.
Problem with it now is it is turning into an environmental disaster. The hydraulics leak.
But that Toyota engine is some kind of miracle though. It has oil in the rad, coolant in the oil pan, no gap in the points and the spark plugs look like solid black blobs. But it starts immediately and runs perfect other than a lot of smoke, LOL.