title: Preiss RHJ-9
text: # Preiss RHJ-9
  
  The Preiss RHJ-9 is an evolution of the RHJ-7 and RHJ-8 side-by-side two-seat flapped homebuilt gliders. The wingspan was increased to 18.29 m and the maximum mass was raised to 500 kg. A wing construction similar to that of the later HP-18 was adopted employing foam ribs bonded to the aluminum spars and skins. It first flew in 1978.
  
  ## Specifications
  
  General characteristics
  
  * Crew: 1 pilot
  * Capacity: 1 passenger
  * Wingspan: 60 ft 0 in (18.29 m)
  * Wing area: 155 sq ft (14.4 $m^2)$
  * Aspect ratio: 23.25
  * Empty weight: 670 lb (304 kg)
  * Gross weight: 1,102 lb (500 kg)
  
  Performance
  
  * Rate of sink: 138 ft/min (0.70 m/s)
  