Fresh air intake ducts

These are available in both original Sonex shape and true NACA shape

Sonex intakes

These are not a true NACA shape but are designed to fit the original Sonex intake cut-out.

  • Greatly improved airflow over the standard intake
  • Fitted with just 3 flush-head screws, although an edge sealant is recommended
  • 6061 Al flap can be painted or polished to match the aircraft
  •  Air outlet is aimed about chest-high for best cooling without having to add eyeball vents
  • Coarse thread controller – only 3 turns open to closed
  • No extra drag when vent is closed
  • Mass of assembly is only 104 grams (3.7 ounces)
  • Vents are 3-D printed in PLA, a plastic that is impervious to many solvents but is bio-degradable.
Silver
Orange
Grey

The vents are currently available in silver, orange or grey.  The thread is always going to be white because it is printed from nylon to allow it to flex.

NACA intake

This is a true NACA duct so is intended for new fitting.  Note that they cannot be fitted with the original “Sonex” cut-out.

Silver

The NACA ducts are also available with 1 3/4″ round outlet, either straight or with a 45° bend.

Straight 1.75″
NACA inlet, 1.75″ 45 outlet
Outside view

Click on the following link for Cut-out profile for NACA duct

  • Improved airflow over the “Sonex” shape intake above (subjective test using a smaller vent fitted to my Sonex – those guys at NACA knew what they were doing)
  • Lower profile than my original vent
  • Fitted with just 3 flush-head screws plus optional screw holes
  • 6061 Al flap can be painted or polished to match the aircraft
  •  Air outlet is aimed about chest-high for best cooling without having to add eyeball vents (1.75″ pipe outlet for duct connection to eyeball vent also available)
  • Coarse thread controller – only 3 turns open to closed
  • Low drag when vent is open – no drag when vent is closed
  • Mass of assembly is only 81 grams (2.9 ounces)
  • Same price as my original “Sonex” vent above

NACA intake – non adjustable

These are a normal NACA intake with 1.75″ round outlet for connection via scat hose to an “eyeball” vent.

NACA vent outside view
NACA vent inside view
Other colours available

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