Back Bone Seraph

Design and development

The Seraph was designed to comply with the US FAR 103 Ultralight Vehicles rules as well as European regulations. It features a paraglider-style wing, single-place accommodation and a single engine in pusher configuration. The fuel tank capacity is 10 litres (2.2 imp gal; 2.6 US gal). Each model in the line is named for its metric propeller diameter.

As is the case with all paramotors, take-off and landing is accomplished by foot. Inflight steering is accomplished via handles that actuate the canopy brakes, creating roll and yaw.

Variants

Seraph 100

Model with a 22 hp (16 kW) RDM 100 engine in pusher configuration with a 4:1 ratio reduction drive and a 100 cm (39 in) diameter two-bladed wooden propeller. Empty weight is 17 kg (37 lb).

Seraph 113

Model with a 22 hp (16 kW) RDM 100 engine in pusher configuration with a 4:1 ratio reduction drive and a 113 cm (44 in) diameter two-bladed wooden propeller. Empty weight is 18 kg (40 lb).

Seraph 115

Model with a 22 hp (16 kW) RDM 100 engine in pusher configuration with a 4:1 ratio reduction drive and a 125 cm (49 in) diameter two-bladed wooden propeller. Empty weight is 19 kg (42 lb).

Specifications (Seraph 100)

Data from Bertrand

General characteristics

Crew: one

Empty weight: 17 kg (37 lb)

Fuel capacity: 10 litres (2.2 imp gal; 2.6 US gal)

Powerplant: 1 × RDM 100 single cylinder, two-stroke, air-cooled aircraft engine, with a 4:1 reduction drive, 16 kW (22 hp)

Propellers: 2-bladed, 1.00 m (3 ft 3 in) diameter