Ross RH-3

RH-3
Role	Glider
National origin	United States
Manufacturer	Marvin Hicks
Designer	Harland Ross
First flight	1 January 1963
Primary user	Marvin Hicks
Number built	One
Developed from	Ross R-2

The Ross RH-3 is a single seat, mid-wing glider that was designed by Harland Ross.[1][2]

Design and development

Ross designed the R-3 as simplified version of the Ross R-2 Ibis with the intention of making the aircraft type easier to construct for amateur builders. The fuselage remained similar to the R-2, but the wing was redesigned as a straight wing, in contrast to the R-2's complex gull wing. The R-3 design was intended to be of all-wooden construction and employed a NACA 23018 airfoil section. Ross never constructed an example of the R-3.[1][2]

Marvin Hicks of Aurora, Colorado purchased a set of plans and built a modified version of the aircraft over a ten-year period, culminating in a first flight on 1 January 1963. Hicks' aircraft used an increased span wing with flaps and a NACA 63 (3)-618 laminar flow airfoil. He designated the aircraft as the RH-3, indicating Ross-Hicks as contributing designers. The RH-3 proved to be a good performer in soaring contests.[1][2][3]

Variants

R-3

Original Ross design, with a NACA 23018 airfoil. None built.[1][2]

RH-3

Hicks modified Ross design, with a NACA 63 (3)-618 laminar flow airfoil. One built.[1][2]

Specifications (RH-3)

Data from Sailplane Directory and Soaring[1][2]

General characteristics

• Crew: one
• Wingspan: 50 ft 0 in (15.24 m)
• Wing area: 146 sq ft (13.6 m^2)
• Aspect ratio: 17:1
• Airfoil: NACA 63 (3)-618
• Empty weight: 480 lb (218 kg)
• Gross weight: 715 lb (324 kg)

Performance

• Maximum glide ratio: 34:1 at 58 mph
• Rate of sink: 126 ft/min (0.64 m/s) at 40 mph
• Wing loading: 4.9 lb/sq ft (24 kg/m^2)

See also

• List of gliders

References

1. Activate Media (2006). "R-3 Ross". Archived from the original on July 15, 2011. Retrieved March 8, 2011.
2. Said, Bob: 1983 Sailplane Directory, Soaring Magazine, page 60. Soaring Society of America, November 1983. USPS 499-920
3. Federal Aviation Administration (March 2011). "Make / Model Inquiry Results". Retrieved March 8, 2011.