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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.
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