title: Advance Bi Beta
text: # Advance Bi Beta
  
  The Advance Bi Beta (sometimes written as BiBeta) is a tandem two-place paraglider, designed and produced by Advance Thun of Thun, Switzerland.
  
  ## Design and development
  
  The Beta was designed as a two-place flight training glider for introducing new student pilots to the sport.
  
  The Beta has undergone continuous development, starting with the original Beta, through the Beta 2, 3, 4 and 5 models.
  
  ## Variants
  
  ### Bi Beta
  
      Tandem two place glider, initial model.
  
  ### Bi Beta 2/3
  
      Tandem two place glider sold in the mid-2000s.
  
  ### Bi Beta 4
  
      Tandem two place glider sold in the late-2000s.
  
  ### BiBeta 5
  
      Tandem two place glider sold in the mid-2010s. Its wing has an area of 40.81 $m^2$ (439.3 sq ft) and an aspect ratio of 5.2:1. The pilot weight range is 120 to 225 kg (265 to 496 lb).
  
  ## Specifications (BiBeta 5)
  
  Data from manufacturer
  
  General characteristics
  
  * Crew: one
  * Capacity: one passenger
  * Wing area: 40.81 $m^2$ (439.3 sq ft)
  * Aspect ratio: 5.2:1
  * Empty weight: 8.5 kg (19 lb)
  * Gross weight: 225 kg (496 lb)
  
  Performance
  
  * Maximum speed: 47 km/h (29 mph, 25 kn)
  * Cruise speed: 41 km/h (25 mph, 22 kn) trim speed
  * Maximum glide ratio: 8.5:1
  * Rate of sink: 1.2 m/s (240 ft/min)
  