Supriya Ghosh (Editor)

Grob G104 Speed Astir

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Top speed  270 km/h
Length  6.69 m
Wingspan  15 m
Manufacturer  Grob Aircraft
Grob G104 Speed Astir Grob G104 Speed Astir IIB Untitled Aviation Photo 1658854

The Grob G104 Speed Astir was a competition sailplane produced in Germany in the late 1970s as Grob's first design in the 15 metre class. Taking the G102 Astir design as a starting point, the Speed Astir featured a new wing of narrower chord and different section, a fin and rudder of reduced height, capacity for 150 kg (330 lb) of water ballast, and "elastic flaps". This latter feature eliminated the drag normally created by the gap between the wing trailing edge and a deployed flap by attaching the highly-elastic skin of the wing to the flap itself, so that when the flap was deployed, this skin would stretch over the gap that would normally be created.

Contents

Grob G104 Speed Astir AviationCornernet Aircraft photography Grob G104 Speed Astir IIB

The original Speed Astir flew in early 1978, but was replaced in production by the end of the year by a refined design named the Speed Astir II. This had a slimmer, laminar-flow fuselage and made use of carbon fibre in its construction. A version with a lengthened fuselage for taller pilots and incorporating carbon fibre wing spars was made available in 1979 as the IIB, along with an increased-span version of the IIB as the II 17.5. Production of all variants was discontinued shortly thereafter.

Grob G104 Speed Astir saleplane Grob Speed Astir II and IIb G 104 pilots aviation

Grob 104 Speed Astir IIB First Flight


Specifications (Speed Astir II)

General characteristics

Grob G104 Speed Astir Speed Astir XC Romania

  • Crew: One pilot
  • Length: 6.69 m (21 ft 11 in)
  • Wingspan: 15.00 m (49 ft 3 in)
  • Height: 1.27 m (4 ft 2 in)
  • Wing area: 11.5 m2 (124 ft2)
  • Aspect ratio: 19.6
  • Empty weight: 265 kg (584 lb)
  • Gross weight: 515 kg (1,135 lb)
  • Performance

  • Maximum speed: 270 km/h (168 mph)
  • Maximum glide ratio: 41.5
  • Rate of sink: 0.6 m/s (120 ft/min)

  • Grob G104 Speed Astir Grob G104 Speed Astir II Untitled Aviation Photo 1648389

    Grob G104 Speed Astir httpsiytimgcomvi3BEtq77QPGEmaxresdefaultjpg

    Grob G104 Speed Astir Grob G104 Speed Astir Wikipedia

    References

    Grob G104 Speed Astir Wikipedia