DeMonteur Posted November 28, 2021 Share Posted November 28, 2021 When testing ARK-UD when I press test button the needle on UGR-4UK indicates about 140°-160° not 180°±10° as it should be. Find out after cold start on Syria map, than tested from hot start on Caucasus and Syria map. Third time on Caucasus map this test was about 3 degrees out of bounds. Quote from provided manual: Quote In TEST mode, the bearing needle of the UGR-4UK directional gyro points to 180°±10° and the currently set operating mode lamp illuminates Mi-8_ARKUD_Test.trk Mi-8_ARKUD_Test_Syria.trk 132nd vWing Link to comment Share on other sites More sharing options...
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