A while back I read in a book or magazine that to get a general idea of the load a prop will put on an engine you take [diameter x diameter x pitch]. But I am not sure my old brain registered that correctly. If that equation is right then the total number for a 14x6 would be 1176, while the total number for a 16x4 would be 1024. So the 16x4 would put less load on the engine? The same as a 20x10 has a number of 4000, while a 22x8 would be 3872 so the 22x8 would spin easier. Is this formula right or did I just get it mixed up, which seems to happen more and more as the years go by.