The Quasar Relief is a series of Czech

high-wing A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes. A monoplane has inherently the highest efficiency and lowest drag of any wing conf ...

, single-place, topless, competitions

hang glider Hang gliding is an air sports, air sport or recreational activity in which a pilot flies a light, non-motorised foot-launched heavier-than-air aircraft called a hang glider. Most modern hang gliders are made of an aluminium alloy or Composite ma ...

s that was designed and produced by

Quasar A quasar is an extremely luminous active galactic nucleus (AGN). It is pronounced , and sometimes known as a quasi-stellar object, abbreviated QSO. This emission from a galaxy nucleus is powered by a supermassive black hole with a mass rangin ...

of Dolní Bečva. The aircraft is supplied complete and ready-to-fly.Bertrand, Noel; Rene Coulon; et al: ''World Directory of Leisure Aviation 2003-04'', page 47. Pagefast Ltd, Lancaster OK, 2003.

Design and development

The Relief is made from

aluminum Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. It h ...

tubing, with the cross tube and battens made from

carbon fibre Carbon fiber-reinforced polymers (American English), carbon-fibre-reinforced polymers (Commonwealth English The use of the English language in current and former member countries of the Commonwealth of Nations was largely inherited fro ...

and the double-surface wing covered in

Dacron Polyethylene terephthalate (or poly(ethylene terephthalate), PET, PETE, or the obsolete PETP or PET-P), is the most common thermoplastic polymer resin of the polyester family and is used in fibres for clothing, containers for liquids and food ...

sailcloth. The nose angle for all models is 132°. The models are each named for their rough wing area in square metres. The design is "topless", that is lacking a

kingpost A king post (or king-post or kingpost) is a central vertical post used in architectural or bridge designs, working in tension to support a beam below from a truss apex above (whereas a crown post, though visually similar, supports items above f ...

and upper rigging, instead using a reinforced cross tube for rigidity. Some models, designated with an "RX" suffix, have a small

horizontal stabilizer A tailplane, also known as a horizontal stabiliser, is a small lifting surface located on the tail (empennage) behind the main lifting surfaces of a fixed-wing aircraft as well as other non-fixed-wing aircraft such as helicopters and gyroplan ...

attached to the keel tube that can be deployed 90° to act as a

speed brake In aeronautics, air brakes or speed brakes are a type of flight control surface used on an aircraft to increase the drag on the aircraft. Air brakes differ from spoilers in that air brakes are designed to increase drag while making little ...

for landing.

Variants

;Relief 13 :Small-sized model for lighter pilots. Its span wing has a wing area of and an aspect ratio of 8:4:1. ;Relief 13 RX :Small-sized model for lighter pilots. Its span wing has a wing area of and an aspect ratio of 8.0:1. The pilot hook-in weight range is . This model has a small horizontal stabilizer attached to the keel tube that can be deployed 90° to act as a speed brake. ;Relief 14 :Mid-sized model for mid-weight pilots. Its span wing has a wing area of and an aspect ratio of 7.7:1. The pilot hook-in weight range is . ;Relief 14 RX :Mid-sized model for mid-weight pilots. Identical to the 14, except this model has a small horizontal stabilizer attached to the keel tube that can be deployed 90° to act as a speed brake. ;Relief 15 :Large-sized model for heavy-weight pilots. Its span wing has a wing area of and an aspect ratio of 7.2:1. The pilot hook-in weight range is .

Specifications (Relief 13)

References

External links

* {{Quasar aircraft

Relief Relief is a sculptural method in which the sculpted pieces are bonded to a solid background of the same material. The term '' relief'' is from the Latin verb ''relevo'', to raise. To create a sculpture in relief is to give the impression that th ...

Hang gliders