The register · data as of October 8, 2026

Aircraft with Rotax 503 DCDI engines built in the 1990s

124 on the U.S. register, newest registrations first. This is the list behind a number on another page; the words above say exactly what it counts. Individuals are not named at this time; companies, trusts and government bodies are shown as the FAA publishes them.

Tail no.	Maker and model	Owner and base	Certificate	Registered	Status
N6630Q	Kolb FIRESTAR	Individual owner California	Experimental	2026-07-29	Valid
N998TR	Aventura H P AMPHIBIAN	Individual owner Texas	Experimental	2026-07-01	Valid
N235AW	Rans S-14	Individual owner Georgia	Experimental	2026-05-31	Valid
N4124T	Buckeye Powered Parachutes Inc 1998	Individual owner Texas	Experimental	2026-01-06	Valid
N589SD	Pegasus Aviation QUANTUM 15	Co-owned owner South Carolina	Experimental	2025-10-23	Valid
N626KW	Quad City Ultralight Acft Corp CHALLENGER II	Individual owner Georgia	Experimental	2025-10-16	Valid
N9237N	Quad City Ultralight Acft Corp CHALLENGER II	Individual owner Georgia	Experimental	2025-09-26	Valid
N2486Z	Buckeye Aviation DREAM MACHINE	Individual owner Indiana	Experimental	2025-09-17	Valid
N3792A	Harrison FIRESTAR 2	Individual owner Kentucky	Experimental	2025-02-21	Valid
N515YT	Robinson James E CHALLENGER II	Individual owner Tennessee	Experimental	2024-12-21	Valid
N8602X	Lamirande Challenger Ii CHALLENGER II	Individual owner Indiana	Experimental	2024-12-03	Valid
N80857	Strickland Benjamin F QUICKSILVER MXLII SP	Individual owner Alabama	Experimental	2024-11-25	Valid
N497DH	Cgs Hawk ARROW	Individual owner Arizona	Experimental	2024-05-01	Valid
N878DW	Titan Aircraft TORNADO I	Individual owner California	Experimental	2024-04-25	Valid
N9237E	Quad City Ultralight Acft Corp CHALLENGER II	Individual owner Georgia	Experimental	2024-01-03	Valid
N203MG	Schantz James CHALLENGER 2	Individual owner California	Experimental	2023-12-15	Valid
N1655E	Kolb FIRESTAR KXP	Individual owner Illinois	Experimental	2023-12-05	Valid
N9088G	Reppert Merlyn R HURRICANE HP	Individual owner Nevada	Experimental	2023-09-17	Valid
N6220S	Hanson Phillip E CHALLENGER II	Individual owner Illinois	Experimental	2023-07-29	Valid
N304CD	Ultralight Flight Inc PHANTOM	Individual owner Washington	Experimental	2023-06-17	Valid
N2614T	Cosmos PHASE II	Individual owner Washington	Experimental	2023-06-10	Valid
N5615B	Kolb FIRESTAR	Individual owner Idaho	Experimental	2023-04-05	Valid
N5518Y	Carlson Lloyd G CHALLENGER I	Individual owner Louisiana	Experimental	2023-02-25	Valid
N164ZX	Quad City Challenger CHALLENGER II	Individual owner Washington	Experimental	2022-12-10	Valid
N963DG	Kolb FIRESTAR II	Individual owner Wyoming	Experimental	2022-04-29	Valid
N7094T	Kolb FIRESTAR II	Individual owner New York	Experimental	2021-08-07	Valid
N7029N	Flightstar Sportplane SPYDER	Individual owner Mississippi	Experimental	2021-06-28	Valid
N4145S	Strickland Benjamin F CHALLENGER II	Individual owner Alabama	Experimental	2021-05-05	Valid
N80422	Slipstream REVELATION	Individual owner Wisconsin	Experimental	2021-01-06	Valid
N183SW	Whitley Scott CHALLENGER II	Individual owner Alabama	Experimental	2020-12-17	Valid
N9128Y	Dickert Chris K CHALLENGER II	Individual owner Indiana	Experimental	2020-09-23	Valid
N3638D	Maler Carl J CHALLENGER II	Individual owner California	Experimental	2020-08-22	Valid
N148LS	Quad City Ultralight CHALLENGER II	Kuwait International Aircraft Leasing INC Wilmington, Delaware	Experimental	2020-08-15	Valid
N2480Y	Brown Benjamin C CHALLENGER II	Individual owner New Mexico	Experimental	2020-01-10	Valid
N29990	Titan Aircraft TORNADO	Individual owner South Carolina	Experimental	2019-09-18	Valid
N864RC	Quad City Ultralight Acft Corp CHALLENGER II	Individual owner South Carolina	Experimental	2019-08-28	Valid
N8507T	Paul Donald R CHINOOK PLUS II	Individual owner Minnesota	Experimental	2019-06-29	Valid
N521DK	Koshinski David A AVENTURA HP	Signmaxx LLC Larksville, Pennsylvania	Experimental	2019-04-18	Valid
N140JL	Loomis John C RANS S-14	Individual owner Oregon	Experimental	2019-02-23	Valid
N80466	Quad City Ultralights CHALLENGER II	Co-owned owner Missouri	Experimental	2018-10-30	Valid
N7009J	Kolb Aircraft FIRESTAR II	Individual owner Texas	Experimental	2018-08-15	Valid
N949UX	Quad City Ultralights CHALLENGER II	Different Auto LLC Twin Falls, Idaho	Experimental	2018-05-11	Valid
N35023	Buckeye PPC 2 PLACE 503	Individual owner Michigan	Experimental	2018-04-23	Valid
N4834F	Six Chuter SR2	Individual owner Wisconsin	Experimental	2017-11-02	Valid
N1509G	Reppert Merlyn R QUICKSILVER MXSPRINT	Individual owner Arizona	Experimental	2017-02-07	Valid
N465CH	Quad City Aircraft CHALLENGER II	Ch20396W1465 LLC Bruce Twp, Michigan	Experimental	2017-01-27	Valid
N913WW	Airborne EDGE X	Individual owner Texas	Experimental	2016-10-21	Valid
N182EZ	Kolb FIRESTAR 11	Individual owner Massachusetts	Experimental	2016-08-11	Valid
N9556Q	Thomas James R CGS HAWK	Individual owner Maryland	Experimental	2016-07-07	Valid
N574LT	Quad City Ultralight Acft Corp CHALLENGER II	Individual owner Mississippi	Experimental	2016-06-23	Valid
N1025Z	Lenaburg Allen G CHALLENGER I	Individual owner California	Experimental	2016-06-09	Valid
N303CW	Quad Cities Ultralights CHALLENGER II	Individual owner Illinois	Experimental	2016-03-19	Valid
N2522Y	Pegasus QUANTUM 15	Individual owner Illinois	Experimental	2015-10-29	Valid
N87MZ	Harmening Mike HIGH FLYER	Individual owner Wisconsin	Experimental	2015-09-30	Valid
N80538	Sorrell Aircraft Co Ltd SNS-9	Individual owner North Carolina	Experimental	2015-09-25	Valid
N95054	Six Chuter Inc SR-2	Fly Ppc LLC Bountiful, Utah	Experimental	2014-11-13	Valid
N4433H	Quad City Ultralight Acft Corp CHALLENGER II	Individual owner Oregon	Experimental	2014-09-24	Valid
N234FD	Highcraft Aero-Marine Inc BUCCANEER XA	Individual owner Florida	Experimental	2014-06-11	Valid
N1872C	Earthstar Aircraft Inc J24503	Individual owner California	Experimental	2014-03-10	Valid
N204PK	Quad City Ultralight Acft Corp CHALLENGER II	Individual owner Oklahoma	Experimental	2014-02-12	Valid
N312G	Dean James J FLIGHTSTAR I	Individual owner Mississippi	Experimental	2013-12-03	Valid
N787SM	Mock D/Mock S HYPERHOPPER	Individual owner Oklahoma	Experimental	2013-11-01	Valid
N2542A	Quad City Ultralight Acft Corp CHALLENGER II	Co-owned owner Florida	Experimental	2013-09-04	Valid
N3900A	Quicksilver MXII	Co-owned owner Kentucky	Experimental	2013-06-25	Valid
N396RB	Quad City Ultralight CHALLENGER 1 CW	Individual owner Michigan	Experimental	2013-06-18	Valid
N56968	Quad City Ultralight Acft Corp CHALLENGER II	Individual owner Connecticut	Experimental	2013-01-16	Valid
N811EE	Flightstar SPYDER	Individual owner Oklahoma	Experimental	2013-01-15	Valid
N173CF	Six Chuter SKYE RYDER AEROCHUTE	Individual owner Tennessee	Experimental	2012-12-04	Valid
N3746S	Quicksilver SPRINT II	Individual owner Wisconsin	Experimental	2012-09-24	Valid
N48EC	Pegasus Aviation QUANTUM	Individual owner Indiana	Light sport	2012-09-14	Valid
N2736A	Titan Aircraft Co TORNADO I	Individual owner Indiana	Experimental	2012-08-02	Valid
N176CB	Quad City Ultralights CHALLENGER II	Individual owner Alabama	Experimental	2012-07-03	Valid
N80574	Benedict Samuel R QUICKSILVER GT 400	Individual owner Alabama	Experimental	2012-04-24	Valid
N8064A	Benedict Samuel R QUICKSILVER SPRNT II	Individual owner Alabama	Experimental	2012-04-24	Valid
N4378A	Quad City Ultralight Acft Corp CHALLENGER II	Individual owner Vermont	Experimental	2011-11-10	Valid
N248DE	Elliott Don JT-2 THUNDERGULL	Individual owner Washington	Experimental	2011-08-26	Valid
N92310	Kolb FIRESTAR II	Individual owner Georgia	Experimental	2011-06-22	Valid
N585U	Holland Emmett Wayne TITAN TORNADO	Individual owner Idaho	Experimental	2011-04-06	Valid
N2040D	Marcks Philip C BUCKEYE DM	Individual owner Wisconsin	Experimental	2011-01-24	Valid
N1516L	Quad City Ultralight Acft Corp CH II	Individual owner Michigan	Experimental	2010-04-13	Valid
N3090J	Quicksilver MXL SPORT 2	Individual owner Hawaii	Experimental	2009-12-30	Valid
N7012P	Six Chuter SR2	Individual owner Oklahoma	Experimental	2008-07-09	Valid
N2610T	Quad City Ultralights CHALLENGER II	Individual owner Maryland	Experimental	2008-01-14	Valid
N4406K	Kolb KOLB FIRESTAR KXP	Individual owner Wisconsin	Experimental	2007-12-21	Valid
N9473Y	Quad City CHALLENGER II	Individual owner Indiana	Experimental	2007-11-14	Valid
N5698L	Ferguson Aircraft FERGY II	Individual owner Georgia	Experimental	2007-10-30	Valid
N935FS	Sabre Aircraft Inc SABRE 503	Individual owner Tennessee	Experimental	2007-10-19	Valid
N56839	Colstrup Dennis J CHALLENGER I	Individual owner Minnesota	Experimental	2007-10-18	Valid
N171DA	Addison Don G QUICKSILVER SPORT II	Individual owner Alabama	Experimental	2007-10-17	Valid
N755WB	Black James M FLIGHTSTAR II SL	Individual owner North Carolina	Experimental	2007-10-09	Valid
N580DC	Quicksilver Aircraft MXL SPORT	Individual owner Oregon	Experimental	2007-10-03	Valid
N5509L	Rans COYOTE	Individual owner Illinois	Experimental	2007-09-06	Valid
N446RC	Cronk Russell 1650	Individual owner California	Experimental	2007-09-04	Valid
N2643T	Hudgins John M CHALLENGER II	Individual owner Texas	Experimental	2007-08-29	Valid
N177RM	Kolb TWINSTAR MARK II	Individual owner Texas	Experimental	2007-08-27	Valid
N3519Q	Berry Bob A KOLB FIRESTAR II	Individual owner Kentucky	Experimental	2007-08-24	Valid
N5244A	Flight Star Inc II SC	Individual owner Georgia	Experimental	2007-08-24	Valid
N703RC	Cooper Randy D CHALLENGER II	Individual owner Ohio	Experimental	2007-08-24	Valid
N3503U	Strickler Dennis L MXL SPORT II	Individual owner Ohio	Experimental	2007-08-23	Valid
N6147X	Quicksilver Manufacturing Inc SPORT II	Individual owner Florida	Experimental	2007-08-17	Valid