Years and Years ago frankenscagmachines came out with a chart I believe on how long it would take certain mowers to mow an acre. IE: 48" mower can mow 3 acres per hour. 61" mower can mow 5 acres per hour stick edger can do 5000 linear ft of edging per hour. Does anyone have, or know where that chart or one like it went to? Thanks.