Schreder HP-16

"HP-16" redirects here. For the Hewlett-Packard calculator, see HP-16C.

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]

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

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

• National Soaring Museum - 1, listed as "in storage"^[5]

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

• List of gliders

References

1. Activate Media (2006). "HP-16 HP Aircraft, LLC". Archived from the original on April 5, 2012. Retrieved April 15, 2011.
2. 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.

External links

• Photo of HP-16 with a T-tail in flight