Excel spreadsheet developed for Malibu/Mirage weight and balance calculations. All entries are made on “LOADING” page. 1) enter your aircraft empty weight and empty moment (empty arm will be calculated automatically) 2) compare the calculated empty ARM with your POH – must match to use – if not, verify your empty weight & empty moment entries. 3) ONCE VERIFIED, save and it is ready to use. Enter weights and fuel load in boxes provided. see results at bottom and on GRAPH