Show Lt MacReady Reaches Height of Feet by Un Unofficial o Record I I i Hope Held That Final Calibration Will Give Him World Honor DAYTON Ohio March arch 13 A AP Lieutenant John A. A MacReady of McCook field today made another attempt to to m make ke a t worlds world's altitude record but whether he be was wag successful success- success ful ul will will wall not not be definitely established until h have vEl been calibrated by ly the the United United States bureau of standards at Washington I IThe The unofficial reading made by officials here showed the veteran army pilot had bad reached feet which is feet short of the record record record rec rec- ord held by Lieutenant Callizo French Drench a aviator viator This reading McCook McCook McCook Mc Mc- Cook field officials say might be exceeded by that of other Instruments instruments instruments ments as the one one calibrated today I had worked imperfectly at a high altitude the mechanism apparently having stopped topped for a time The Theother Theother Theother other McCook field barograph will not be calibrated until next week NO ILL EFFECTS Lieutenant MacReady showed no ill III 11 effects of the flight and asserted it t was not quite so cold as the flight light he Je made last month In an at- at t- t i tempt empt to set an altitude record The I temperature according to the In Instruments Instruments instruments in- in was 74 74 degrees below zero Fahrenheit For lor several thousand feet Lieutenant Lieutenant Lieutenant Lieu Lieu- tenant MacReady said the same plane Iane he used last month did not function properly a fouled spark sparkplug sparkplug sparkplug plug forced him t to land ten minutes minutes min mm- utes after after his first take and although a new set of spark plugs I Iwas was installed before he made the second take off he still experienced slight Ignition trouble Officials of the field and Lieutenant Lieuten Lieuten- ant MacReady said that in case the official calibration failed to show that hat the altitude record had been broken the lieutenant would probably probably probably ably try again JANUARY FLIGHT When Lieutenant MacReady at attempted attempted attempted at- at tempted to break the the record late in January and was forced down by mechanical defects the official calIbration calibration cal- cal made b by officials at atash Washington Wash ash ington showed that he had gone several thousand feet higher than the unofficial calibration showed Officials are hopeful that the official official cial calibrations on today's flight might show that Lieutenant MacReady MacReady MacReady Mac- Mac Ready broke the record Lieutenant MacReady said however however however how how- ever that he had pushed his plane to the the limit today At feet teet he said his liquid ox oxygen ogen gen supply on which he depends for rarified air ga gave ve au out t and he was f forced to use the emergency tank of oxygen oxygen |