only one wiper ? NO ! When Australian National Airlines was confronted with unionism from its pilots just after the war, the MD Ivan Holyman , remained steadfast in refusing to fit wipers to the R/H windscreens of the many DC-3 s that lacked same. Eventually the newly formed pilots federation had a win. But it did not stop the uninformed prejudices of Ivan Holyman upsetting (and amusing) his troops. He addressed his pilots one day, complaining of their lack of respect and their crudeness in filling out maintenance logs. How so SIR? I will not have entries stating a component or an aircraft is U/S . We all knows what U/S really stands for . It is an obscenity.