Flail mowers are not worthless, they are a very valuable type of multi purpose mower.
Using the Diamond triple gang flail mower as an example one model has 21 feet of ACTUAL cutting width just in one row of grass slicer knives in actual cutting edge length where the following 2 to 3 rows of knives overlap the total cutting edge is greater than 21 feet in length NOT including the un-exposed knive edges on the opposite side of the individual knive, the triple gang mower may have 63 to 84 feet of useable cutting edge with the knive count using a three or four row rotor per mower giving the end user over 168 feet of useable cutting edge versus the available 10 feet five inches of total ACTUAL cutting edge surface per rotation of the typical rotary cutter blades in that width of cut.
Apparently your reading skills have left the building.... I said WORTHLESS IN MY LINE OF WORK. Selectively misquoting doesn't win debates....It merely points out your tendency muddy up the pool with misinformation.
Your explanation is why a flail requires more HP (and therefor more fuel, a larger and more expensive tractor to pull the same width of mower) to do the same job as a much less expensive, far MORE durable rotary mower. Hundreds more moving parts to do the same job.....Even SOUNDS like a mistake.
Bottom line is, flail mowers were FAIL mowers when put to the test in the harsh condition we mow in. We don't mow manicured lawns that get cut every week. We're talking mowing in weeds higher that the tractors hood, chalk full of hidden treasures like car tires, rusty exhaust systems, pieces of road signs, and a laundry list of other roadside debris. When we were demoing the flails, we were forced to stop several times an hour to do damage assessment and repairs. I have Bush Hog bat wings that go an entire season with nothing more in the line of repairs than the occasional touch up on blades. And, as I stated previously, end results were no different. You can talk in circles like a 2-bit politician until the cows come home and it does NOT change the FACT that flail mowers are the worst possible choice in many cases.
Again, cost involved with outfitting mowing rigs to do the volume of work I do is well over 3 times as much with flails as it is for rotaries. Bigger, more expensive tractors, more fuel, less work accomplished per operator due to slower ground speeds all equate to tremendously higher operating cost. Down time wasn't even comparable. The money available to do this work is relatively fixed by competitive bidding. I sure couldn't demand 3 times more for our mowing just because I made a poor choice in equipment. So I make it a point to NOT make poor choices. Apparently you skipped business 101.....Operating at a dead loss with the wrong equipment is no way to run a business. I would not and COULD win ANY of the contracts I currently have with a dead expense as you suggest.
Unlike yourself, I don't tow a tiny little mower around behind a lawn tractor. Obviously you have NO....NONE....ZERO concept of what I do for a living. And just as obvious, you have no concept of what it takes to do my job....In the past few postings, you've done more harm to the flail mower industry that you'll ever realize.
Keep it up! I'm always game for a laugh!