sentence: sm .75 ga the sm .75 ga ( for grande autonomia , meaning '' long range '' ) was a modofication of the sm .75 powered by three 641 kw ( 860 hp ) alfa romeo 128 engines and fitted as well as a powerful radio and auxiliary fuel tanks to boost the aircraft s range to 7,000 kilometers ( 4,350 statute miles ) with a 1,100 - kilogram ( 2,430 - pound ) load .