Alright — based on your Sonex Legacy’s performance, your fuel preferences, and your desire for 2–3 hr legs with interesting stops, I’ve mapped out a suggested coastal-leaning route from The Oaks to Serpentine, WA, avoiding significant overwater except the short hop across northern Spencer Gulf.
I’ve also aimed for airfields with MOGAS (95–98 RON) availability or good nearby access, overnight options, and interesting stopovers.
Proposed Route — The Oaks to Serpentine (WA)
Leg 1: The Oaks (YSKC) → Temora (YTEM)
Distance: ~165 NM
Flight time: ~1 hr 20 min
Fuel: MOGAS available on-field
Why stop: Aviation museum, welcoming GA community
Leg 2: Temora → Mildura (YMIA)
Distance: ~205 NM
Flight time: ~1 hr 35 min
Fuel: MOGAS available nearby (contact aero club)
Why stop: Large regional hub, good overnight & meal options
Leg 3: Mildura → Renmark (YREN)
Distance: ~115 NM
Flight time: ~55 min
Fuel: MOGAS available (check with Renmark Aero Club)
Why stop: Murray River scenery, small friendly airfield
Leg 4: Renmark → Port Augusta (YPAG) (short Spencer Gulf hop)
Distance: ~195 NM
Flight time: ~1 hr 35 min
Fuel: MOGAS nearby (requires jerry cans)
Why stop: Gateway to the Eyre Peninsula, decent accommodation options
Leg 5: Port Augusta → Ceduna (YCDU)
Distance: ~210 NM
Flight time: ~1 hr 40 min
Fuel: MOGAS availability can vary — call ahead
Why stop: Coastal scenery, oysters & seafood
Leg 6: Ceduna → Nullarbor Roadhouse (YNULL)
Distance: ~295 NM
Flight time: ~2 hrs 20 min
Fuel: Only AVGAS — likely your first unavoidable AVGas stop
Why stop: Iconic Nullarbor location, cliffs nearby
Leg 7: Nullarbor Roadhouse → Caiguna (YCAG)
Distance: ~280 NM
Flight time: ~2 hrs 10 min
Fuel: AVGAS only
Why stop: Long straight Eyre Highway stretch, easy access to accommodation
Leg 8: Caiguna → Esperance (YESP)
Distance: ~260 NM
Flight time: ~2 hrs
Fuel: MOGAS possible via local contacts
Why stop: Stunning beaches, great for a rest day if weather’s good
Leg 9: Esperance → Albany (YABA)
Distance: ~180 NM
Flight time: ~1 hr 25 min
Fuel: MOGAS possible through aero club
Why stop: Coastal scenery, historic whaling station, good overnight
Leg 10: Albany → Serpentine (YSEN)
Distance: ~160 NM
Flight time: ~1 hr 20 min
Fuel: MOGAS in Perth area
Why stop: Destination! Serpentine Airfield is a big recreational flying hub
Route Summary
Total Distance: ~2,065 NM (~3,825 km)
Flight Days: 5–7 days comfortable pace
MOGAS Stops: Temora, Mildura, Renmark, Esperance, Albany (plus possible others with jerry can use)
AVGAS-only Stops: Nullarbor, Caiguna (unless fuel drops arranged in advance)
Overnights Recommended: Mildura, Port Augusta, Ceduna, Caiguna, Esperance
Straight from Chat GPT.