Applications
- A-B Helicopters A/W 95
- Aces High Cuby II
- Acrolite
- Advanced Aeromarine Buccaneer SX
- Aero Adventure Aventura HP
- AeroLites Bearcat
- Aeroprakt A-20
- Aeros-2
- Aeros Cross Country
- Aero-Works Aerolite 103
- Airbet Girabet
- Airborne Edge
- Airborne Redback
- Air Creation GT
- Air Creation Racer
- Airdrome Dream Fantasy Twin
- Airdrome Fokker D-VI
- Airdrome Fokker D-VIII
- Alpaero Choucas
- AmeriPlanes Mitchell Wing T-10
- Anglin J6 Karatoo
- Antonov T-2M Maverick
- Antares A-10R503 SOLO
- Antares MA-32
- Apex Eco 6
- Aquilair Kid
- Australian Autogyro Skyhook
- Australian Ultralight Industries Bunyip
- Aviasud Mistral
- Avid Champion
- Avid Flyer
- BAaer Guri
- BB Microlight BB-two seater
- Birdman Chinook 2S
- Best Off Skyranger
- Blue Yonder EZ Flyer
- Blue Yonder EZ Harvard
- Blue Yonder EZ King Cobra
- Blue Yonder Merlin
- Blue Yonder Twin Engine EZ Flyer
- Buckeye Eclipse
- Capella Javelin II
- Capella SS
- Carlson Sparrow
- Circa Reproductions Morane Saulnier N
- Circa Reproductions Nieuport
- CFM Shadow
- CGS Hawk
- Chadwick C-122 helicopter
- Club ULM Rotor Ptenets-2
- Cosmos Bison
- Cosmos Echo
- Cosmos Phase II
- Cyclone AX2000
- Danieli Piuma
- DAR-23
- DTA Evolution
- Earthstar Thunder Gull
- Emerald Coast XL2 Sport
- Eurofly Viper
- Excalibur Aircraft Excalibur
- Facetmobile
- Fisher Avenger
- Fisher Super Koala
- Fisher FP-404 EXP
- Fisher FP-505 Skeeter
- Fisher FP-606 Sky Baby
- Fisher Youngster
- Fletcher Hercules
- Flightstar II
- Fly Air Swallow
- Flying K Sky Raider
- Flylab Tucano
- Fly Synthesis Wallaby
- Freebird II
- GibboGear Butterfly
- Golden Circle Air T-Bird
- Harmening High Flyer
- Harper Lil Breezy
- Heldeberg Convertible
- Heldeberg Marathon
- Heldeberg Spirit 103
- Howland H-3 Pegasus
- Hy-Tek Clipwing
- Hy-Tek Hurricane Hauler
- InterPlane Skyboy
- ISON Airbike
- J & J Ultralights Seawing
- JDT Eros
- Joplin Tundra
- Kolb Firestar
- Kolb Mark III
- Kolb Slingshot
- Kubicek AV-1
- Light Miniature Aircraft LM-1
- Lockwood Drifter XP503
- Loehle Sport Parasol
- Mainair Rapier
- Mariner Aircraft Mariner
- Micro Aviation Bantam
- Midwest Hornet
- Mountaineer Trikes Solo 175
- M-Squared Breese
- Murphy Maverick
- Murphy Renegade
- North American Rotorwerks Pitbull Ultralight
- North Wing Apache
- Pegasus Quantum
- Phantom X1
- Phoenix Skyblazer
- Precision Tech Fergy
- Pterodactyl Ascender
- Pipistrel Taurus
- Quad City Challenger II
- Quicksilver GT400
- Quicksilver MX-2 Sprint
- RagWing RW26 Special II
- RagWing RW7 Duster
- RagWing RW8 PT2S
- RagWing RW11 Rag-A-Bond
- RagWing RW22 Tiger Moth
- Raj Hamsa X-Air
- Rainbow Aerotrike
- Rans S-4 Coyote
- Rans S-6 Coyote II
- Rans S-7 Courier
- Rans S-9 Chaos
- Rans S-12 Airaile
- Rans S-17 Stinger
- Rocky Mountain Wings Ridge Runner
- Rolandas Kalinauskas RK-7 Orange
- Rotor Flight Dynamics Dominator
- Skystar Kitfox XL
- Sabre 340
- Sabre Wildcat
- St Andrews Viking
- Sapphire Aircraft Australia Sapphire LSA
- Sea-Bow International Sea-Bow
- Six Chuter SR1
- Sky Seeker Powerchutes Sky Seeker
- SlipStream Genesis
- Sochen Phoenix
- Solo Wings Aquilla
- Solo Wings Windlass
- Sorrell Hiperlight
- Spartan DFD Aerotome
- Skywatch SS11
- Spectrum Beaver
- Sport Copter Lightning
- Sport Flight Talon
- Summit 2
- Summit 103 Mini Breeze
- Summit Steel Breeze
- TC's Trikes Coyote
- Teman Mono-Fly
- Tennessee Propellers Scout
- TeST TST-3 Alpin T
- Titan Tornado
- TL Ultralight TL-32 Typhoon
- Vortech G-1
- World Seair Corp Seair
Read more about this topic: Rotax 503