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Reg # N37SX


  • 2020 SONEX ONEX Photo 2


Possibly the lowest-cost time-builder, and while you're at it, have fun in this fast aerobatic turbo-charged sharp looking ship. Absolutely beautiful with really nice instrumentation.

7th airplane built by Kevin Quirk. Finished summer 2020.
Not yet flown.
Folding wings standard aerobatic w/ design limits of +6 & -3 Gs.
Optional larger tail wheel 4 1/2" diameter. Tailwheel spring rod is titanium.
Fast plane with normal operating range 46 - 150 MPH, VNE 216 MPH.

Sonex Aircraft Aerovee 2180cc Turbo Engine 100HP
No time on engine except for being run on the ground.
Engine options installed: Turbo with wastegate & scavenge pump, spin-on oil filter, air-oil separator, "mini-sump" accessory and air-oil separator with return line to sump, gascolator with blast tube cooled shroud.Wastegate.
Compression ratio set at 7.6 to 1

Sensenich for Onex Turbo.
Direct-drive fixed-pitch turbo cruise prop


MGL Stratomaster Extreme EFIS (Electronic Flight Information System) with external compass sensor and external ADHD sensor modules
Stratus 3i ADS-B Receiver
Stratus-Appareo ESG Transponder with ADS-B function
Mount for Mini I-Pad with Foreflight for navigation & ADS-B in display
MGL Avionics Model V10 Airband Transceiver Com
GT50 Flight data systems
G-meter which is also clock, timer & voltmeter
Dayton Ford Analog MP & boots gauge combined
Slip-skid ball
12V accessory outlet


Flush-riveted exterior (rounded-head rivets are standard).
Double locked canopy
Transparent fuel cap cover


Oregon Aero Seating with adjustable lumbar support
Five-point belt system
Van's freshair vents
Odyssey ship's battery mounted in cool zone behind firewall with remote AUX charging cable
Panel mounted fuel on-off valve (standard is foot operated)

Additional Equipment

Wing Fold Feature: Wings fold and unfold vertically toward centerline, a one-person job with no tools required. Machined steel hinge plates, "tell-tale" indicator on top of each wing to confirm wing lock status.


Annual due: 4/1/23. Transponder check due 6/1/22. NOTE: T.J. Aircraft Sales believes the following and foregoing information to be accurate but does not warrant nor guarantee the information accordingly; purchasers should rely upon their own inspection of the aircraft. There shall be no agreement between parties unless set forth in a written contract signed by buyer and seller.

T.J Neff Aircraft Sales


Phone: (415) 898-5151

Cell Phone: 415-786-5151

Fax: (415) 898-5155

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