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Preiss RHJ-9
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| Type designation | RHJ-9 |
| Designer | Henry Preiss / Richard Schreder |
| Competition class | Not applicable |
| Crew | 2 |
| Length | 22.8 ft (6.95 m) |
| Height | |
| Cockpit width | |
| Cockpit height | |
| Wingspan | 60 ft (18.29 m) |
| Wing area | 154.8 ft² (14.38 m²) |
| Aspect ratio | 23.2 |
| Wing profile | Wortmann FX 63-K-318 |
| Empty mass | ca. 670 lb (304 kg) |
| Maximum mass | 1100 lb (500 kg) |
| Wing loading | 6.94 lb/ft² (34.77 kg/m²) |
| Maximum speed | 110 knots (204 km/h) |
| Maneuver speed | 90 knots (167 km/h) |
| Speed in strong turbulence | 90 knots (167 km/h) |
| Minimum sink rate | ca. 140 ft/min (0.7 m/s) |
| Best glide ratio | ca. 38 |
The Preiss RHJ-9 is a further evolution of the RHJ-7 and RHJ-8 side-by-side two-seat flapped homebuilt gliders. The wingspan was further 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.
Sources
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