Schreder HP-16

"HP-16" redirects here. For the Hewlett-Packard calculator, see HP-16C.
HP-16
Role Glider
National origin United States
Designer Richard Schreder
Introduction circa 1971
Status No longer in production
Number built about 20
Developed from HP-15

The Schreder HP-16 is an American mid-wing, single seat, V tailed, FAI Standard Class glider that was designed by Richard Schreder.[1][2]

Design and development

After the failure of the HP-15 to perform well in the 1969 US Nationals Schreder started the HP-16 with a new design philosophy. Avoiding the extremely high aspect ratio that the 15 had, he opted for a more modest 21.5:1 aspect ratio and larger wing area to improve performance in weak conditions. The HP-16's wing has 50% more wing area than the HP-15 and uses a Wortmann 67-150 airfoil.[1][2]

Like other Schreder designs the HP-16 is of all-metal construction, but with the wing skins bonded to foam ribs rather than using rivets to provide a smoother surface. The bonded construction also cut building time. The wing features the signature Schreder 90° flaps that allow steep descents and the use of small fields for landing.[1][2]

The HP-16s were all amateur-built aircraft and about 20 were completed and flown.[1][2]

Operational history

In April 2011 there were still eleven HP-16s registered with the US Federal Aviation Administration and two registered with Transport Canada.[3][4]

Aircraft on display

Specifications (variant specified)

Data from Sailplane Directory and Soaring[1][2]

General characteristics

  • Crew: one
  • Wingspan: 49 ft 3 in (15 m)
  • Wing area: 113 sq ft (10.5 m2)
  • Aspect ratio: 21.5
  • Airfoil: Wortmann 67-150
  • Empty weight: 500 lb (227 kg) including 200 lbs (90 kg) of water ballast.
  • Gross weight: 924.5 lb (419 kg)

Performance

  • Maximum glide ratio: 36:1 at 55 mph (89 km/h)
  • Rate of sink: 130 ft/min (0.66 m/s) at 50 mph (80 km/h)
  • Wing loading: 8.18 lb/sq ft (39.9 kg/m2) with water ballast

See also

References

  1. ^ a b c d e Activate Media (2006). "HP-16 HP Aircraft, LLC". Archived from the original on April 5, 2012. Retrieved April 15, 2011.
  2. ^ a b c d e Said, Bob: 1983 Sailplane Directory, Soaring Magazine, page 23. Soaring Society of America, November 1983. USPS 499-920
  3. ^ Federal Aviation Administration (April 2011). "Make / Model Inquiry Results". Retrieved April 15, 2011.
  4. ^ Transport Canada (April 2011). "Canadian Civil Aircraft Register". Archived from the original on July 18, 2011. Retrieved April 15, 2011.
  5. ^ National Soaring Museum (2011). "Sailplanes in Our Collection". Archived from the original on May 16, 2011. Retrieved February 26, 2011.