Schempp-Hirth Ventus

The decline in the cost of carbon fibre during the 1970s allowed sailplane designers to design large components from carbon-fibre reinforced plastic (CFRP). The use of carbon-fibre lay-ups, designed to reduce aero-elasticity of wings, has allowed CFRP gliders to be designed to cruise at much higher speeds than those with wings made from fibreglass (GFRP) or wood, as well as take advantage of thinner aerofoil sections. The Ventus has a 15-metre wingspan, using CFRP in its structure, complying with 15 m Racing Class specifications. Extended wingtips can be fitted to increase the span to 16.6 metres for competition in the Open Class. The fuselage was also produced in two sizes to suit pilots of different heights – the Ventus A for short pilots and Ventus B with a longer and wider cockpit. Both Ventus A and Ventus B have a complex flap/brake arrangement similar to that of the Glasflügel Mosquito and the Mini-Nimbus, but the Ventus C reverted to conventional upper-surface air-brakes that are separate from the trailing-edge flaps.

Wingtip extensions could be fitted to the Ventus A and B to increase the wingspan to 16.6 m. Longer extensions could be fitted to the Ventus C to increase the span to 17.6 m. Modified extensions with winglets are also available. Some Ventus Bs and Cs are equipped with a small sustaining engine ("turbo") and are designated with a T while some are equipped with a more powerful engine and are self-launching and are designated with an M.

The best measured glide ratio of a Ventus at 15 metres wingspan is 44:1, improving to 46:1 with the 16.6 metre tips, giving a creditable performance for the 1980s and 1990s. Ventus sailplanes won two World Gliding Championships, competing against the ASW 20 and later the LS6 in the 15 m class. Whilst the Ventus A and B acquired reputations for unparalleled high-speed glide performance, the Ventus C introduced improvements in handling.

About 613 Ventus sailplanes were built before being replaced by the Schempp-Hirth Ventus 2 in 1995.

The Ventus 1 remains a competitive glider winning national level competitions. The Ventus 1A is still being flown at the World Championship level in 2017.

data from:Schempp-Hirth Flugzeugbau GmbH website{{cite web|title=Ventus|url=http://www.schempp-hirth.com/index.php?id=8|website=schempp-hirth.com|accessdate=22 January 2015|url-status=dead|archiveurl=https://web.archive.org/web/20150122101457/http://www.schempp-hirth.com/index.php?id=8|archivedate=22 January 2015}}

;Ventus A (15m / 16.6m)

:The production standard 15m class Ventus with shorter and narrower cockpit.

;Ventus B (15m / 16.6m)

:Production aircraft with larger cockpit for larger pilot.

;Ventus BT (15m / 16.6m)

:The Ventus B with a retractable sustainer motor.

;Ventus C (15m / 17.6m)

:Later model with improved handling and air brakes separate from the trailing-edge flaps.

;Ventus CT (15m / 17.6m)

:The Ventus C with a retractable sustainer motor.

;Ventus CM (15m / 17.6m)

:The Ventus C with a retractable motor for self-launching.

{{Aircraft specs

|ref=Jane's All the World's Aircraft 1988–89 {{cite book |title=Jane's All the World's Aircraft 1988–89 |year=1988 |publisher=Jane's Information Group |location=London |isbn=0-7106-0867-5 |editor=John W.R. Taylor|pages=630–632}}

|prime units?=met

|crew=1

|length m=6.58

|span m=17.6

|span note=with extensions

|wing area sqm=10.15

|wing area note=with extensions

|aspect ratio=30.2 with extensions

|airfoil=Wortmann/Holighaus/Althaus section

|empty weight kg=243

|max takeoff weight kg=430

|more general=

• Water ballast: {{convert|160|L|USgal impgal|abbr=on}}

|stall speed kmh=58

|never exceed speed kmh=270

|never exceed speed note=in smooth air

::::{{convert|200|kph|kn mph|abbr=on}} in rough air

::::{{convert|180|kph|kn mph|abbr=on}} on aero-tow

::::{{convert|150|kph|kn mph|abbr=on}} on winch launch

|g limits=+5.3 -2.65

|glide ratio=49 at {{convert|100|kph|kn mph|abbr=on}} fuselage version "a"

|sink rate ms=0.54

|sink rate note= at {{convert|75|kph|kn mph|abbr=on}}

|lift to drag=

|wing loading kg/m2=33

|more performance=

|avionics=

}}

{{aircontent

|see also=

|related=

|similar aircraft=

|lists=

• List of gliders

}}

{{reflist}}

• {{cite book|last1=Milgram|first1=Fred Thomas; Judah|last2=translator|last3=contributor|title=Fundamentals of sailplane design|date=1999|publisher=College Park Press|location=College Park, MD|isbn=978-0966955309|edition=3rd}}
• {{cite book |last=Simons |first=Martin |title=Sailplanes 1965–2000 |year=2005 |publisher=EQIP Werbung und Verlag G.m.b.H. |location=Königswinter |isbn=978-3-9808838-1-8 |edition=2nd revised}}

{{Commons category}}

• [https://web.archive.org/web/20050206183811/http://www.ssa.org/Magazines/Johnson.asp Johnson R,
  A FTE of the Ventus A, Soaring, December 1981
  A FTE of the Ventus B, Soaring, June 1982
  A FTE of the 16.6m Ventus, Soaring, April 1984]
• [http://www.flightglobal.com/pdfarchive/view/1980 Flight Global]
• [https://web.archive.org/web/20150122101457/http://www.schempp-hirth.com/index.php?id=8 Schempp-Hirth website]
• [https://web.archive.org/web/20060112150257/http://www.sailplanedirectory.com/PlaneDetails.cfm?planeID=376 Specifications of Schempp-Hirth Ventus]

{{Schempp-Hirth}}

Category:1980s German sailplanes

Ventus

Category:T-tail aircraft

Category:Aircraft first flown in 1980