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Ozone Delta 4

Ref. #1015


A Quantum Leap: The Delta 4 offers the largest performance gain we have yet seen with the Delta model range! Including Free Postage 

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from £4,049.99

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New Features For 2020; Available Now!

  • Offers the largest performance gain we have yet seen with the Delta model range whilst retaining the comfort and ease of use that has made this series the best-selling sport class wing of all time.
  • 2-Liner technology in the wing tips significantly reduces drag while improving spanwise lift distribution.
  • A new lower-drag profile developed from the Mantra series with smaller openings and higher efficiency.
  • Ozone say it’s a good choice for a first C wing for pilots moving up from B-class

 Performance Testing

  • The D4 has a massive +12cm/s sink rate advantage over the D3 during full speed glides. In calm air, this results in a full glider-cone height gain every minute. In turbulence, the gain is larger as the D4 cuts through turbulence using gusts for altitude gain, much like a competition wing. The max speed of the D4 is 3kph faster, walking away from the D3 in accelerated flight.

 True Performance

  • Intuitive and efficient AoA control, an improved airfoil design, and optimised internal structure make the D4 an XC glide machine in turbulence. Its structure is the strongest we have yet made. Even in aggressive turbulence the profile remains undisturbed, retaining its shape and efficiency without performance loss from chordwise deformation.

 New ACR System

  • The new Ozone Active Control Risers, inherited from the Mantra series, allows full AoA control throughout the speed range without deforming the camber of the profile. The ACR system acts on B & C lines giving 2-liner control with the comfort of a 3-liner design.


  • This is the best behaved Delta yet. The D4 is highly resistant to collapse, even at full speed in turbulence. The post-collapse behaviour is the mildest of the entire Delta series. This has been achieved by keeping the aspect ratio relatively low, by improving the structure and line architecture, and by optimising wing twist. Extensive testing shows little tendency to shoot or rotate after side collapse, and no shock re-inflation. The behaviour in frontals is excellent with immediate reopening.
  • Thanks to the Ozone Shark Nose profile, the wing is resistant to spin & stall and can be flown safely at low speed making top landings, or landings in tight spots, simple for a wing of this class.

 Tuned for Joy

  • Compared to the D3, the handling is vastly improved. The brakes are linear — precise in the first part of the range and effective in the second. It is easy to adjust the angle of bank and to place the wing exactly where you want in the core. Strong chord structure and high sail cohesion make for highly coordinated roll/yaw and an agile, exciting feel.

 The Pilot

  • The Delta 4 is for intermediate to advanced pilots who fly 50-100 hrs per year and have SIV experience. Due to its ease of use and high levels of passive safety, it is also very suitable for pilots moving up from the category below. More experienced pilots who want to fly with higher margins of safety will find the D4 a satisfying XC tool with class-leading performance.


The Ozone delta 4 comes in 5 standard colour options


Ozone encourages you to customize your own personal colour combination for your wing. Customization incurs a one off £100 Fee. Once you’ve decided your colour scheme you can share your design with your friends!!

Custom Colours

Please add your Custome Ozone Colour Reference i.e  (A/K/W/T) at the checkout screen.

Technical Data

The R5 retains a moderate Aspect Ratio for ease of use and higher levels of passive safety. Performance gains have come as a result of optimisations in the line layout and next-gen 3D shaping which splits the leading edge into three distinct sections for a clean, wrinkle-free surface. Enhanced panel shaping and TE mini-ribs have also reduced parasitic drag. A new optimised Shark Nose profile aids in all categories including stability, comfort, performance, and the brake range – making it extremely resistant to accidental spin or stall.


Number of cells666666666666
Projected area (m2)16.0418.419.620.721.823.4
Flat area (m2)19.321.723.124.425.727.6
Projected span (m)8.529.049.339.59


Flat span (m)10.8111.4611.8312.1612.4712.92
Projected Aspect Ratio4.
Flat aspect ratio6.
Root Chord (m)2.252.382.462.532.62.69
Glider Weight (kg)4.454.795.015.265.455.76
Certified Weight Range (kg)58-7065-8575-9585-10595-115110-130
Recommended Flying Weight (kg)60-7070-8482-9490-104100-114112-128
EN  CC  


  • Top Surface Cloth: Dominico 30D 

  •  Bottom Surface Cloth: Dominico 20D 

  • Rib cloth:  Porcher 9017 E29 (hard)

  • Upper lines: Edelrid 8000U serie

  • Mid lines: Edelrid 8000U serie

  • Lower Lines: Edelrid 8000U serie


The Pilot

The Delta 4 is aimed at intermediate to advanced pilots who fly 50-100 hours per year and have SIV experience. Ozone say it’s a good choice for a first C wing for pilots moving up from B-class. Certification is underway (MS and ML are certified at the time of writing) and it will be available in six sizes, XS to XL for 60kg to 128kg all up.


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