ThunderTiger 60
GENERALLY, A 60 2 ST AND A 91 4ST ARE ABOUT THE SAME POWER., BUT THAT IS GENERAL....I AM CURRENTLY RECOVERING A TIGER 60 THAT I HAVE FLOWN FOR SEVERAL YEARS WITH 61 2ST AND PER MANY THREADS HERE, HAVE LIKE OTHERS, DECIDED TO PUT A TT 91 4ST IN IT.....WHICH RAN GOOD IN A SIG 4*60...THE ENGINES STILL DOES BUT THE 4* CRASHED THROUGH NO FAULT OTHER THAN THE POOR JUDGEMENT OF THE PILOT...THE 4ST USES FAR LESS FUEL AND SOUNDS BETTER...