SONEX Onex Model Guide
SONEX Onex · Model Guide
Overview
SONEX Onex is a single-engine piston aircraft from Sonex Aircraft, LLC, built by amateurs. The supplied documents are an avionics and electrical drawing and wing installation instructions. They give no price, weight, range or engine-output figures, so confirm those with the builder or seller.
- SONEX Onex is amateur-built, so each aircraft's wiring and equipment can differ. Inspect the individual airplane closely.
- Sonex does not supply a full electrical schematic. Ask the seller for the owner's own wiring diagrams and equipment list.
- The wings come off and go back on with spar pins, so check the pins, safety pins and linkages at every assembly.
- The ASI arcs run to a never-exceed speed of 217 MPH, and the green arc ends at 151 MPH.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Reference only, not for flight. Use the current approved manual for your aircraft. See terms, section 5.
Document
Source
Copy found at sprinkle.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Model Guide
- Year ·
- 2026
- File size ·
- 46 KB
- Copy found at ·
- sprinkle.com
What kind of aircraft is the SONEX Onex?
SONEX Onex is a single-engine piston aircraft from Sonex Aircraft, LLC. The documents describe it as amateur-built, and the electrical drawing shows AeroVee engine wiring.
What are the SONEX Onex airspeed limits?
On the SONEX Onex airspeed indicator, the green arc runs 50 to 151 MPH and the yellow arc 151 to 217 MPH. The red never-exceed line is at 217 MPH. The white flap arc runs 40 to 110 MPH.
Can the SONEX Onex wings be removed?
Yes. The SONEX Onex wing instructions cover installing and removing each wing panel using spar pins. Two people are needed per wing, and the pitot tube and control linkages must be disconnected first.
Does Sonex supply the SONEX Onex electrical schematic?
No complete one. For the SONEX Onex, Sonex says amateur-built aircraft are too varied for an all-encompassing schematic. It gives only a basic power-feed diagram and design recommendations.
What is the SONEX Onex Model Guide?
The SONEX Onex Model Guide is a model guide for the SONEX Onex, dated 2026.
What year was the SONEX Onex Model Guide published?
The SONEX Onex Model Guide — the SONEX Onex model guide on file — is dated 2026.
Common. More common than 93% of the aircraft models we track.
Most owners only have the POH. Here's the essential set for the SONEX Onex.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
Free — save the SONEX to your watchlist and track it in one place.
More SONEX Onexmanuals & documents
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In this document
Airspeed markings
The Onex avionics drawing gives airspeed indicator markings in MPH. White arc: 40 to 110 (stall with flaps to maximum flap extension speed). Green arc: 50 to 151 (stall with no flaps to maximum structural cruise speed). Yellow arc: 151 to 217. Red: 217 and up (never exceed speed).
Electrical and engine wiring
The main power bus is fed from a 12V battery through a master relay and master switch. The suggested battery cable size is 4 gauge, but sizes may change to suit the installation. Sonex recommends MIL-W-22759/16 wire and following each component maker's instructions. Without specific guidance, use AC 43.13. AeroVee engines must be wired per the AeroVee Assembly and Installation manual.
Wing installation and removal
The wings slide into the fuselage spar box and are held by spar pins, each secured with a safety pin. Flap pushrods, aileron pushrods and pitot lines are then connected. Pitot lines are checked for leaks. Removal is the reverse and needs two people per wing, one at the tip and one at the root, with the flap supported.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Safety notes
- Check that all four safety pins are installed in the spar pins, and that the flap and aileron pushrods are connected and safetied.
- Check the pitot lines and pitot tube for leaks after any wing reassembly.
- Inspect the wiring against the component makers' requirements: circuit design, fusing, wire size and switching.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Full document text
SONEX Onex Model Guide SONEX Onex is a single-engine piston aircraft from Sonex Aircraft, LLC, built by amateurs. The supplied documents are an avionics and electrical drawing and wing installation instructions. They give no price, weight, range or engine-output figures, so confirm those with the builder or seller. • SONEX Onex is amateur-built, so each aircraft's wiring and equipment can differ. Inspect the individual airplane closely. • Sonex does not supply a full electrical schematic. Ask the seller for the owner's own wiring diagrams and equipment list. • The wings come off and go back on with spar pins, so check the pins, safety pins and linkages at every assembly. • The ASI arcs run to a never-exceed speed of 217 MPH, and the green arc ends at 151 MPH. Airspeed markings The Onex avionics drawing gives airspeed indicator markings in MPH. White arc: 40 to 110 (stall with flaps to maximum flap extension speed). Green arc: 50 to 151 (stall with no flaps to maximum structural cruise speed). Yellow arc: 151 to 217. Red: 217 and up (never exceed speed). Electrical and engine wiring The main power bus is fed from a 12V battery through a master relay and master switch. The suggested battery cable size is 4 gauge, but sizes may change to suit the installation. Sonex recommends MIL-W-22759/16 wire and following each component maker's instructions. Without specific guidance, use AC 43.13. AeroVee engines must be wired per the AeroVee Assembly and Installation manual. Wing installation and removal The wings slide into the fuselage spar box and are held by spar pins, each secured with a safety pin. Flap pushrods, aileron pushrods and pitot lines are then connected. Pitot lines are checked for leaks. Removal is the reverse and needs two people per wing, one at the tip and one at the root, with the flap supported. Safety notes: • Check that all four safety pins are installed in the spar pins, and that the flap and aileron pushrods are connected and safetied. • Check the pitot lines and pitot tube for leaks after any wing reassembly. • Inspect the wiring against the component makers' requirements: circuit design, fusing, wire size and switching.