http://www.os-engines.co.jp/english/...t/airindex.htm

scroll down to discontinued list and click
there you find the following

TWO-STROKE ENGINES FOR FIXED-WING AIRCRAFT

MAX-160FX-FI MAX-140RX-FI MAX-65LA MAX-50SX RING
MAX-40FX MAX-46LA MAX-25LA MAX-15LA
MAX-10LA MAX-46LA-S MAX-40LA-S MAX-25LA-S
MAX-15LA-S MAX-32SX - -


>>> LIST >>> Discontinued LIST


tower does not list as discontinued yet but I dont think it will be long

now what will be the mainstream ssc engine?