Engines · two-cycle piston · data as of October 23, 2026

Rotax 503DCSI

72 aircraft on the U.S. register carry a Rotax 503DCSI engine, rated at about 52 horsepower. The Quicksilver MXL II is the model most often fitted with it (2 aircraft). The aircraft carrying it were built between 1983 and 2017.

The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Rotax 503DCSI. FAA spelling: 503DCSI.

Fitted to model families

Quicksilver MXL II2Quicksilver SPORT II2Rans S-42Aerotrike SAFARI1Air Creation RACER1Airborne AIRBORNE 2000 EDGE X1Airborne Windsports REDBACK1Angolia Anthony Wayne THUNDER GULL1Antares MA-321Aquilair KID1Bipes Gary FIRESTAR1Blythe Brian K CHALLENGER II1

Model families, as a table

	aircraft
Quicksilver MXL II	2
Quicksilver SPORT II	2
Rans S-4	2
Aerotrike SAFARI	1
Air Creation RACER	1
Airborne AIRBORNE 2000 EDGE X	1
Airborne Windsports REDBACK	1
Angolia Anthony Wayne THUNDER GULL	1
Antares MA-32	1
Aquilair KID	1
Bipes Gary FIRESTAR	1
Blythe Brian K CHALLENGER II	1

Quicksilver MXL II · Quicksilver SPORT II · Rans S-4 · Aerotrike SAFARI · Air Creation RACER · Airborne AIRBORNE 2000 EDGE X · Airborne Windsports REDBACK · Angolia Anthony Wayne THUNDER GULL · Antares MA-32 · Aquilair KID

Where they are owner's state

Wisconsin7Illinois6Michigan5Texas4Missouri4Florida4Arizona4New York3North Carolina3California3

By state, as a table

	aircraft
Wisconsin	7
Illinois	6
Michigan	5
Texas	4
Missouri	4
Florida	4
Arizona	4
New York	3
North Carolina	3
California	3

Kind of aircraft

Piston singles52 (72%)Weight-shift and powered parachutes20 (28%)

By kind, as a table

	aircraft	share
Piston singles	52	72%
Weight-shift and powered parachutes	20	28%

When the aircraft were built by decade

By decade built, as a table

	aircraft
1980	7
1990	19
2000	29
2010	4

Connections how this engine series links to the rest of the register

Fitted to

Quicksilver MXL II 2 with this engine series
Quicksilver SPORT II 2 with this engine series
Aerotrike SAFARI 1 with this engine series
Buckeye DREAM MACHINE 1 with this engine series
Flightstar Inc FLIGHTSTAR II 1 with this engine series
Harmening HIGH FLYER 1 with this engine series
Powrachute Corp SKY RASCAL 1 with this engine series
Quad City Ultralight Acft Corp CHALLENGER II 1 with this engine series

Where they are

Wisconsin 7 of these aircraft
Illinois 6 of these aircraft
Michigan 5 of these aircraft
Texas 4 of these aircraft
Missouri 4 of these aircraft

Analytics

The whole map of how records connect · these connections as data: /graph/engine/rotax-503dcsi.json.

Aircraft newest certificates first · 72

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N9032N	Quicksilver MXL II	Fixed-wing, single engine	Individual owner Kentucky	Experimental	2026-07-18	Valid
N5202P	Quicksilver SPORT	Fixed-wing, single engine	Individual owner Illinois	Experimental	2025-03-25	Valid
N873D	Reams Arnold D CHALLENGER II	Fixed-wing, single engine	Individual owner Tennessee	Experimental	2025-02-19	Valid
N503RL	Cgs Aviation S S HAWK CLASSIC	Fixed-wing, single engine	Foothills Aviation LLC Buhl, Idaho	Experimental	2024-12-30	Valid
N109LT	Tucker Lon R CHALLENGER II	Fixed-wing, single engine	Individual owner Missouri	Experimental	2024-12-09	Valid
N946JS	Powrachute SKY RASCAL	Powered parachute	Individual owner Texas	Experimental	2024-03-01	Valid
N1992C	Teratorn TIERRA II	Fixed-wing, single engine	Individual owner Michigan	Experimental	2024-01-09	Valid
N3079H	Harmenings HIGH FLYERS	Powered parachute	Individual owner North Carolina	Experimental	2023-08-10	Valid
N5161G	Zielinski Steven G PHANTOM X-1	Fixed-wing, single engine	Individual owner Pennsylvania	Experimental	2023-01-24	Valid
N980WC	Sides Rick A MANTA 503	Weight-shift control	Individual owner California	Experimental	2022-12-31	Valid
N739K	Katz Jerry L CHALLENGER II	Fixed-wing, single engine	Individual owner Illinois	Experimental	2022-10-29	Valid
N8059Q	Cgs Aviation Inc HAWK CLASSIC	Fixed-wing, single engine	Individual owner North Carolina	Experimental	2022-07-02	Valid
N203M	Robert T Motazedi QS SPRINT II	Fixed-wing, single engine	Individual owner North Dakota	Experimental	2022-04-04	Valid
N503BJ	Travis George SKY RAIDER II	Fixed-wing, single engine	Skyraider N503Bj LLC Chesaning, Michigan	Experimental	2022-03-30	Valid
N142CG	Rans S-4	Fixed-wing, single engine	Individual owner Florida	Experimental	2021-07-22	Valid
N75112	Nevsimal Steven L HARMENINGS HIGH FLYE	Powered parachute	Individual owner Wisconsin	Experimental	2021-02-09	Valid
N194PG	Flightstar Inc FLIGHTSTAR II	Fixed-wing, single engine	Individual owner South Carolina	Experimental	2020-12-12	Valid
N5085R	Quicksilver SPORT II	Fixed-wing, single engine	Individual owner South Dakota	Experimental	2020-09-09	Valid
N8091N	Quicksilver SPORT II	Fixed-wing, single engine	Individual owner Florida	Experimental	2020-07-20	Valid
N594TC	Quicksilver Aircraft Corp MXL II	Fixed-wing, single engine	Individual owner Puerto Rico	Experimental	2019-09-17	Valid
N612S	Englund Ken RANS S-12XL	Fixed-wing, single engine	Individual owner Tennessee	Experimental	2019-08-16	Valid
N6037N	Airborne AIRBORNE 2000 EDGE X	Weight-shift control	Individual owner Alaska	Experimental	2018-08-08	Valid
N2574W	Gibbo Gear BB103	Weight-shift control	Westfield Technical Academy Westfield, Massachusetts	Experimental	2018-06-19	Valid
N3094S	Quicksilver MXL II	Fixed-wing, single engine	Individual owner Wisconsin	Experimental	2018-06-18	Valid
N89WP	Poehls Doug W CHALLENGER II	Fixed-wing, single engine	Individual owner Arizona	Experimental	2018-05-10	Valid
N767LS	Rans S-4	Fixed-wing, single engine	Individual owner California	Experimental	2018-04-05	Valid
N330TM	Nelson Todd M RALLY 3	Fixed-wing, single engine	Withheld at owner's request	Experimental	2017-01-18	Valid
N75545	Williams James E QUICKSILVER SPORT 2	Fixed-wing, single engine	Individual owner Pennsylvania	Experimental	2016-06-08	Valid
N29GK	Aquilair KID	Weight-shift control	Individual owner Florida	Experimental	2016-01-06	Valid
N5066Z	Quicksilver SPRINT 2	Fixed-wing, single engine	Individual owner Minnesota	Experimental	2015-11-30	Valid
N5684L	Dvorak Lawrence J LIL BREEZY	Fixed-wing, single engine	Individual owner Missouri	Experimental	2015-07-09	Valid
N5026J	Foppe Dean D CHALLENGER II	Fixed-wing, single engine	Individual owner Ohio	Experimental	2015-01-05	Valid
N9509N	Ultra Soaring Inc WIZARD	Fixed-wing, single engine	Individual owner Missouri	Experimental	2014-09-16	Valid
N114TT	Dinsmore TORNADO	Fixed-wing, single engine	Individual owner Oklahoma	Experimental	2014-09-11	Valid
N457MA	Sabre 16SS	Weight-shift control	Individual owner Arizona	Experimental	2013-09-27	Valid
N181DL	Robert M Opperman CHALLENGER	Fixed-wing, single engine	Individual owner Arizona	Experimental	2013-05-17	Valid
N500ZC	Caton Harley T Jr CHALLENGER II LW	Fixed-wing, single engine	Individual owner North Carolina	Experimental	2012-05-31	Valid
N519WD	Bipes Gary FIRESTAR	Fixed-wing, single engine	Individual owner Wyoming	Experimental	2012-05-24	Valid
N8075L	Erb Robert M FIRESTAR II	Fixed-wing, single engine	Individual owner Georgia	Experimental	2010-03-31	Valid
N361ST	Quad City Ultralight Acft Corp CH II LONGWING	Fixed-wing, single engine	Individual owner Mississippi	Experimental	2008-05-20	Valid
N6533R	Quad City Ultralight Acft Corp CHALLENGER II	Fixed-wing, single engine	Individual owner Louisiana	Experimental	2008-02-11	Valid
N301CD	Ultralight Flight Inc PHANTOM	Fixed-wing, single engine	Individual owner Washington	Experimental	2008-01-18	Valid
N381AS	Cgs Hawk SINGLE PLACE	Fixed-wing, single engine	Individual owner Delaware	Experimental	2007-12-20	Valid
N6112Q	Misicka Lawrence J COYOTE S-4	Fixed-wing, single engine	Individual owner Wisconsin	Experimental	2007-09-18	Valid
N937SK	Kilbarger Shawn SPRINT II	Fixed-wing, single engine	Individual owner Ohio	Experimental	2007-09-13	Valid
N217AB	Buckeye DREAM MACHINE	Powered parachute	Individual owner Michigan	Experimental	2007-09-06	Valid
N829TT	Quad City Challenger CHALLENGER II	Fixed-wing, single engine	Individual owner Colorado	Experimental	2007-09-06	Valid
N142MB	Kolb Co Inc TWIN STAR	Fixed-wing, single engine	Individual owner Minnesota	Experimental	2007-09-05	Valid
N2827A	Fisher Flying Products FP-404	Fixed-wing, single engine	Individual owner Illinois	Experimental	2007-08-31	Valid
N2639T	Hudgins John M QUICKSILVER SPORT II	Fixed-wing, single engine	Individual owner Texas	Experimental	2007-08-29	Valid
N592JE	Kolb FIRESTAR KXP	Fixed-wing, single engine	Co-owned owner Illinois	Experimental	2007-08-24	Valid
N690JP	Flightstar SPYDER	Fixed-wing, single engine	Individual owner New York	Experimental	2007-08-24	Valid
N3504U	Cgs Aviation HAWK ARROW	Fixed-wing, single engine	Individual owner Arizona	Experimental	2007-08-23	Valid
N388D	Air Creation RACER	Weight-shift control	Individual owner Illinois	Experimental	2007-08-22	Valid
N61495	Sabre Aircraft SABRE TRIKE 503	Weight-shift control	Individual owner Florida	Experimental	2007-08-17	Valid
N181M	Mc Croskey Danny D RANS S-9 CHAOS	Fixed-wing, single engine	Individual owner Arkansas	Experimental	2007-08-15	Valid
N2518W	Harmening HIGHFLYER	Powered parachute	Individual owner Wisconsin	Experimental	2007-06-08	Valid
N212N	Mapes Joseph S RIDGE RUNNER	Fixed-wing, single engine	Individual owner Wisconsin	Experimental	2007-05-17	Valid
N2558N	Gard George A CGS HAWK ARROW	Fixed-wing, single engine	Individual owner New York	Experimental	2007-04-19	Valid
N4368J	Dillon Stephen F BB TRIKE	Weight-shift control	Individual owner Texas	Experimental	2006-10-10	Valid
N6003N	Aerotrike SAFARI	Weight-shift control	Individual owner Michigan	Experimental	2006-09-14	Valid
N51351	Kolb FIRESTAR 2	Fixed-wing, single engine	Individual owner Missouri	Experimental	2006-08-25	Valid
N103HV	Powrachute Corp SKY RASCAL	Powered parachute	Individual owner Texas	Experimental	2006-08-02	Valid
N5128M	Coyle Ralph V BB TRIKE SWING WING	Weight-shift control	Individual owner Washington	Experimental	2006-07-27	Valid
N987WB	Antares MA-32	Weight-shift control	Individual owner Alaska	Experimental	2006-07-12	Valid
N747FG	Airborne Windsports REDBACK	Weight-shift control	Individual owner New York	Experimental	2006-06-27	Valid
N5084J	Curless Glen M SR2CL	Powered parachute	Individual owner Wisconsin	Experimental	2006-06-05	Valid
N5067F	Lein James N SKYE RYDER	Powered parachute	Individual owner Wisconsin	Experimental	2006-05-05	Valid
N19636	English John Day CHALLENGER II	Fixed-wing, single engine	Individual owner California	Light sport	2006-03-10	Valid
N39WA	Angolia Anthony Wayne THUNDER GULL	Fixed-wing, single engine	Individual owner Virginia	Experimental	2006-02-24	Valid
N328BK	Blythe Brian K CHALLENGER II	Fixed-wing, single engine	Individual owner Illinois	Experimental	2005-09-20	Valid
N2844C	Hall Madison D CHALLENGER II S	Fixed-wing, single engine	Individual owner Michigan	Experimental		Pending

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 23, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.