http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=734846614 Link to gas turbine for sale on EBAY. Max thrust is 640 lbs. Mount this on the boom of a backhoe, should clean an acre of leaves in 2-3 minutes. Guy says a toyota MR2 went 145mph with one of these. Its guaranteed not to budge a heavy tractor with 640 lb thrust, but it should throw a lot of leaves. Anyone ever stand behind an airplane? Last week was at the airport looking touring a Gulfstream V that was visiting. You can't even stand up behind it if the engine is idling and you are 50 ft away.