Rotax 503 series
449 aircraft on the U.S. register carry a Rotax 503 series engine, rated at about 52 horsepower. The Quad City Ultralight Acft Corp CHALLENGER II is the model most often fitted with it (8 aircraft). The aircraft carrying it were built between 1983 and 2025.
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 503 series. FAA spelling: 503 SERIES.
Fitted to model families
Quad City Ultralight Acft Corp CHALLENGER II8Quicksilver SPORT5Quad City Ultralights CHALLENGER II4Quicksilver GT-4004Quicksilver SPRINT II4Air Creation GTE3Air Creation TWIN3Buckeye DREAM MACHINE3Buckeye Industries DREAM MACHINE3North Wing APACHE3Pipistrel TAURUS3Powrachute Corp SKY RASCAL3
Quad City Ultralight Acft Corp CHALLENGER II · Quicksilver SPORT · Quad City Ultralights CHALLENGER II · Quicksilver GT-400 · Quicksilver SPRINT II · Air Creation GTE · Air Creation TWIN · Buckeye DREAM MACHINE · Buckeye Industries DREAM MACHINE · North Wing APACHE
Where they are owner's state
California29Florida28Texas22Indiana20Illinois20Wisconsin17Oklahoma15North Carolina15Ohio14Arizona14
Kind of aircraft
Piston singles321 (71%)Weight-shift and powered parachutes108 (24%)Gyroplanes9 (2%)Helicopters6 (1%)Gliders5 (1%)
When the aircraft were built by decade
Connections how this engine series links to the rest of the register
Fitted to
- Quad City Ultralight Acft Corp CHALLENGER II 8 with this engine series
- Quicksilver SPORT 5 with this engine series
- Quad City Ultralights CHALLENGER II 4 with this engine series
- Quicksilver GT-400 4 with this engine series
- Quicksilver SPRINT II 4 with this engine series
- Air Creation GTE 3 with this engine series
- Air Creation TWIN 3 with this engine series
- Buckeye DREAM MACHINE 3 with this engine series
Where they are
- California 29 of these aircraft
- Florida 28 of these aircraft
- Texas 22 of these aircraft
- Indiana 20 of these aircraft
- Illinois 20 of these aircraft
Biggest operators
- Tsi Holdco INC 1 of these aircraft
Analytics
These connections as data: /graph/engine/rotax-503-series.json · about the eFlight graph.
Aircraft newest certificates first · 449
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N8053E | Fluegeman Ken B CHALLENGER II |
Fixed-wing, single engine | Individual owner Indiana |
Experimental | 2007-07-27 | ValidFAA registration status code V: Valid registration. All codes |
| N5346W | Team Aircraft HI-MAX |
Fixed-wing, single engine | Individual owner California |
Experimental | 2007-07-20 | ValidFAA registration status code V: Valid registration. All codes |
| N178RV | Vogt Raymond J CHALLENGER II |
Fixed-wing, single engine | Individual owner Oregon |
Experimental | 2007-07-19 | ValidFAA registration status code V: Valid registration. All codes |
| N191SK | Buckeye Industries Inc DREAM MACHINE 503 |
Powered parachute | Individual owner Indiana |
Experimental | 2007-07-19 | ValidFAA registration status code V: Valid registration. All codes |
| N913BB | Fleming Benjamin N FIELDHOPPER II STJ |
Powered parachute | Individual owner Arkansas |
Experimental | 2007-07-11 | ValidFAA registration status code V: Valid registration. All codes |
| N90567 | Rocky Mountain Wings RIDGERUNNER I |
Fixed-wing, single engine | Individual owner South Dakota |
Experimental | 2007-07-06 | ValidFAA registration status code V: Valid registration. All codes |
| N7179N | Buckeye Industries DREAM MACHINE |
Powered parachute | Individual owner Indiana |
Experimental | 2007-06-29 | ValidFAA registration status code V: Valid registration. All codes |
| N9010L | Smyth Harold H QUICKSILVER MXLII |
Fixed-wing, single engine | Individual owner Florida |
Experimental | 2007-06-28 | ValidFAA registration status code V: Valid registration. All codes |
| N997RB | Rans S-9 |
Fixed-wing, single engine | Individual owner California |
Experimental | 2007-06-15 | ValidFAA registration status code V: Valid registration. All codes |
| N345JT | Sabre Aircraft Inc SABRE 503 |
Weight-shift control | Individual owner Wyoming |
Experimental | 2007-05-24 | ValidFAA registration status code V: Valid registration. All codes |
| N547R | Flightstar FLIGHTSTAR II-SL |
Fixed-wing, single engine | Individual owner Indiana |
Experimental | 2007-05-23 | ValidFAA registration status code V: Valid registration. All codes |
| N264RS | Quad City Ultralight Acft Corp CHALLENGER II |
Fixed-wing, single engine | Individual owner Tennessee |
Experimental | 2007-05-10 | ValidFAA registration status code V: Valid registration. All codes |
| N30964 | Gemini Industries 3 |
Powered parachute | Individual owner Kansas |
Experimental | 2007-05-09 | ValidFAA registration status code V: Valid registration. All codes |
| N66353 | Starflight TX2000 |
Fixed-wing, single engine | Individual owner California |
Experimental | 2007-05-08 | ValidFAA registration status code V: Valid registration. All codes |
| N976RJ | Moore Randy O BUCKEYE DREAMMACHINE |
Powered parachute | Co-owned owner Montana |
Experimental | 2007-05-04 | ValidFAA registration status code V: Valid registration. All codes |
| N2541N | Smith Paul A QUICKSILVER SPRINT 2 |
Fixed-wing, single engine | Individual owner Maryland |
Experimental | 2007-04-30 | ValidFAA registration status code V: Valid registration. All codes |
| N6543L | Life Lawrence D MINI SPORT |
Fixed-wing, single engine | Individual owner Kansas |
Experimental | 2007-04-27 | ValidFAA registration status code V: Valid registration. All codes |
| N2552U | Quad City Ultralight Acft Corp CHALLENGER II |
Fixed-wing, single engine | Individual owner New Jersey |
Experimental | 2007-04-25 | ValidFAA registration status code V: Valid registration. All codes |
| N1662L | Airborne Windsports Inc REDBACK |
Weight-shift control | Individual owner Florida |
Experimental | 2007-04-18 | ValidFAA registration status code V: Valid registration. All codes |
| N2564Q | Skye Ryder Aerochute SIX CHUTER SR II |
Powered parachute | Individual owner Illinois |
Experimental | 2007-04-18 | ValidFAA registration status code V: Valid registration. All codes |
| N7012V | Airborne Windsports EDGE X SERIES-REDBAC |
Weight-shift control | Individual owner West Virginia |
Experimental | 2007-04-11 | ValidFAA registration status code V: Valid registration. All codes |
| N503BH | Cgs Hawk HAWK CLASSIC |
Fixed-wing, single engine | Individual owner Kentucky |
Experimental | 2007-04-03 | ValidFAA registration status code V: Valid registration. All codes |
| N8561Y | Quicksilver SPRINT II |
Fixed-wing, single engine | Individual owner Illinois |
Experimental | 2007-04-03 | ValidFAA registration status code V: Valid registration. All codes |
| N8612A | Quad City Ultralight Acft CHALLENGER CW11 |
Fixed-wing, single engine | Individual owner Illinois |
Experimental | 2007-03-30 | ValidFAA registration status code V: Valid registration. All codes |
| N6554A | Harmenings High Flyers HIGH FLYER |
Powered parachute | Individual owner Alaska |
Experimental | 2007-03-28 | ValidFAA registration status code V: Valid registration. All codes |
| N435U | Orendorff Allen SKYRANGER |
Fixed-wing, single engine | Individual owner Arizona |
Experimental | 2007-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N65325 | Sixchuter SPIRIT |
Powered parachute | Individual owner Montana |
Experimental | 2007-03-14 | ValidFAA registration status code V: Valid registration. All codes |
| N277DW | Wilson Ds/Dillon Jl QUICKSILVER MXIIA |
Fixed-wing, single engine | Co-owned owner Indiana |
Experimental | 2007-02-16 | ValidFAA registration status code V: Valid registration. All codes |
| N31748 | Evans Eugene L TUKAN(E) |
Weight-shift control | Individual owner California |
Experimental | 2007-02-09 | ValidFAA registration status code V: Valid registration. All codes |
| N43079 | Schaefer Donald E MA30 |
Weight-shift control | Individual owner Alaska |
Experimental | 2006-12-15 | ValidFAA registration status code V: Valid registration. All codes |
| N94330 | Ashlock Jerry Lee SR5 |
Powered parachute | Individual owner Oklahoma |
Experimental | 2006-12-11 | ValidFAA registration status code V: Valid registration. All codes |
| N3055K | Quad City Ultralight Corp CHALLENGER II |
Fixed-wing, single engine | Individual owner California |
Experimental | 2006-10-26 | ValidFAA registration status code V: Valid registration. All codes |
| N7510V | Tukan 2 PLACE |
Weight-shift control | Individual owner South Carolina |
Experimental | 2006-10-20 | ValidFAA registration status code V: Valid registration. All codes |
| N6026R | Six Chuter SKYE RYDER |
Powered parachute | Individual owner Vermont |
Experimental | 2006-09-25 | ValidFAA registration status code V: Valid registration. All codes |
| N96869 | Collister Ralph E Jr CHALLENGER II |
Fixed-wing, single engine | Individual owner Colorado |
Experimental | 2006-08-21 | ValidFAA registration status code V: Valid registration. All codes |
| N122FM | Murdock Frank H CHALLENGER II |
Fixed-wing, single engine | Individual owner Georgia |
Experimental | 2006-06-27 | ValidFAA registration status code V: Valid registration. All codes |
| N335U | Orendorff Allen HAWK |
Fixed-wing, single engine | Individual owner Arizona |
Experimental | 2006-04-21 | ValidFAA registration status code V: Valid registration. All codes |
| N804WS | Seifert Walter J QUAD CTY CHALLENGER2 |
Fixed-wing, single engine | Individual owner Minnesota |
Experimental | 2006-04-06 | ValidFAA registration status code V: Valid registration. All codes |
| N221SL | Burghgrave Brian Peter STARLITE |
Fixed-wing, single engine | Individual owner Illinois |
Experimental | 2006-03-01 | ValidFAA registration status code V: Valid registration. All codes |
| N781PC | Mcdonough Patrick C QUAD CITY CHALNGR II |
Fixed-wing, single engine | Individual owner Wisconsin |
Experimental | 2006-02-01 | ValidFAA registration status code V: Valid registration. All codes |
| N9122Q | Roggatz Alvin R CHALLENGER II |
Fixed-wing, single engine | Co-owned owner Iowa |
Experimental | 2005-11-30 | ValidFAA registration status code V: Valid registration. All codes |
| N46469 | Wengel Carl ODYSSEY |
Fixed-wing, single engine | Individual owner Utah |
Experimental | 2005-07-21 | ValidFAA registration status code V: Valid registration. All codes |
| N713JC | Air Creation TWIN 503 SL GJ |
Fixed-wing, single engine | Individual owner Illinois |
Experimental | 2004-05-05 | ValidFAA registration status code V: Valid registration. All codes |
| N4056T | Hagan David QCKSLVR MXL SPORT II |
Fixed-wing, single engine | Individual owner Ohio |
Experimental | 1994-07-28 | ValidFAA registration status code V: Valid registration. All codes |
| N262JW | Westerinen John P NIEUPORT II |
Fixed-wing, single engine | Individual owner Michigan |
Experimental | 1990-06-15 | ValidFAA registration status code V: Valid registration. All codes |
| N3737F | Day Dennis BUCCANEER SX |
Fixed-wing, single engine | Central Virginia Aviation INC North Dinwiddie, Virginia |
Experimental | ValidFAA registration status code V: Valid registration. All codes | |
| N400CD | American Aerolites FALCON XP |
Fixed-wing, single engine | Individual owner Iowa |
Experimental | Sale reportedFAA registration status code 7. All codes | |
| N473KM | Robbie Mabry EXCALIBUR LW |
Fixed-wing, single engine | Individual owner Oklahoma |
Experimental | Sale reportedFAA registration status code 7. All codes | |
| N829SM | Macpherson Stephen R QUICKSILVER MXII |
Fixed-wing, single engine | Individual owner Texas |
Experimental | CanceledFAA registration status code 18: Sale reported, canceled. All codes |
Previous Page 5 of 5
Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.