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Schreder HP-11
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| Type designation |
HP-11 |
| Competition class |
Club |
| Number built |
73 + |
| Crew |
1 |
| Length |
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| Height |
|
| Cockpit width |
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| Cockpit height |
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| Wingspan |
15.85 m (52 ft) |
| Wing area |
9.66 m² (104 ft²) |
| Aspect ratio |
26 |
| Empty mass |
204 kg (450 lb) |
| Water ballast |
NA |
| Maximum mass |
318 kg (700 lb) |
| Wing loading |
6.7 lb/ft² |
| Maximum speed |
130 kt/150 mph/240 km/h |
| Rough air speed |
105 kt/121 mph/194 km/h |
| Maneuver speed |
105 kt/121 mph/194 km/h |
| Minimum sink rate |
0.55 m/s (1.8 ft/s) at 47 mph (75 km/h) |
| Glide ratio |
37:1 at 86 km/h (54 mph) |
| Roll rate |
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The Schreder HP-11 is a homebuilt glider designed by Richard Schreder in 1962. Schreder campaigned the prototype in the 1963 World Soaring Championships in Argentina, achieving a third-place finish.
After minor modifications, including adoption of retractable undercarriage and deletion of the prototype's flap-aileron interconnect, Schreder marketed the HP-11A version as a kit. Several dozen were completed and flown through the mid-1970s.
The HP-11 is constructed almost entirely of aluminum alloy, using plastics and fiberglass composites only for non-structural fairings. The wings are of conventional riveted construction. The wing spar is an I-beam assembled from 7075-T6 alloy sheet and angle extrusions.
Like other Schreder sailplanes, the HP-11 uses 90-degree flaps for glidepath control.
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