. ▁It ▁shares ▁many ▁components ▁with ▁its ▁T L - 2 0 0 0 ▁St ing ▁low ▁wing ▁stable mate . ▁ ▁The ▁high ▁wing ▁has ▁a ▁constant ▁ch ord ▁centre ▁section ▁and ▁t aper ed ▁outer ▁pan els ▁with ▁dow nt urn ed ▁tips ▁and ▁is ▁b rac ed ▁to ▁the ▁lower ▁fus el age ▁with ▁a ▁pair ▁of ▁forward - lean ing ▁lift ▁str uts . ▁ ▁The ▁fin ▁is ▁swe pt , ▁with ▁a ▁wide ▁d ors al ▁fil let , ▁and ▁car ries ▁a ▁horn - bal anced ▁rud der . ▁The ▁t aper ed , ▁mass - bal anced ▁elev ators ▁are ▁set ▁at ▁mid - f us el age . ▁ ▁The ▁under wing ▁cabin ▁of ▁the ▁Si ri us ▁has ▁a ▁single ▁piece ▁wind screen , ▁gla zed ▁side ▁doors , ▁rear ▁side ▁windows ▁and ▁an ▁upper ▁rear ▁trans par ency . ▁A ▁choice ▁of ▁flat ▁four ▁engines ▁offers ▁either ▁the ▁ 5 9 . 6   k W ▁( 8 0   hp ) ▁Rot ax ▁ 9 1 2 UL ▁or ▁the ▁ 7 3 . 5   k W ▁( 9 8 . 6   hp ) ▁Rot ax ▁ 9 1 2 ▁U LS . ▁The ▁Si ri us ▁is ▁fitted ▁with ▁a ▁fixed ▁tr icy cle ▁under car riage ▁with ▁main w he els ▁fus el age ▁mounted ▁on ▁composite ▁cant ile ver ▁spring ▁legs . ▁ ▁The ▁nose w heel ▁is ▁ste er able ▁and ▁the ▁main w he els