Schreder HP-11
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| Type designation | HP-11 |
| Competition class | Club |
| Number built | 73 + |
| Crew | 1 |
| Length | |
| Height | |
| Cockpit width | |
| Cockpit height | |
| 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 | |
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.
[edit] Designation series
HP-7 - HP-8 - HP-10 - HP-11 - HP-12 - HP-13 - HP-14 - HP-15 - HP-16 - RS-15 - HP-17 - HP-18 - HP-19 - HP-20 - HP-21 - HP-22
[edit] External links
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