X-Air Ultralight Aircraft Indicated airspeed problem

Aziz Musa #12033 The difference between CAS and IAS should not be more then 3-5 mph at these slow speeds not 21. On Wed, May 23, 2018 at 6:01 PM avia1or01@... [X-Air_Ultralight_Aircraft] <X-Air_Ultralight_Aircraft@...> wrote: toggle quoted message Show quoted text ? I have a problem with my 912 X-air F. The BMAA have kicked back my permit renewal as they say I ran the VNE test at 85kt IAS and they say I should have run it at 106 kt IAS and must repeat it.? The reason is my POH has a calibration chart which says 85kt IAS = 85 CAS. They say this is wrong and for my aircraft the calibration card should red 85kt CAS = 106 kt IAS.? After 4 years of flying it and comparing to GPS ground speed I thought my IAS was very accurate. The ASI is the B?uniger glass cockpict LCD display which was recently serviced and calibrated by Br?uniger themselves. ?What doe other peoples Calibration charts read , especially if there is anyone else with the Br?uniger LCD flat screen instruments.

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