Alisport Silent 2


Alisport Silent 2

__NOTOC__ Infobox Aircraft
name=Silent 2


caption=A Silent 2 with elliptical winglets
type=DU class sailplane
national origin=Italy
manufacturer=Alisport
designer=
first flight=
introduced=
retired=
status=
primary user=
more users=
produced=
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The Alisport Silent 2 is a single seater sailplane of Italian manufacture. It is of the FAI type DU Class glider. It is sold by Alisport ready-to-fly or kit-built as pure glider or self-launching glider.The self-launching version is fitted with a single-blade propeller belt-driven by a two-stroke engine.

Design and construction

*The fuselage is carbon and glass fiber composite with epoxy resin.
*The wings have an elliptical planform, vertical or elliptical design winglets. The wing structure includes extensive use of carbon fiber, both in the sandwich skins and in the tapered I-beam wing spar which uses pultruded carbon rods for the spar caps.
*The wing geometry is notable in that it varies non-linearly from the root to the tip, both in overall planform shape and in wing section profile.
*The flaperons stretch for 11.0 meters of the full wingspan and their range of motion varies from positive landing L +8°, to +4° for thermalling, to 0°, -4°, and S -8° reflex positions for cruising.
*Schempp-Hirth-type spoilers extend on the upper wing surface only.
*Fixed main wheel behind the pilot, with shock absorber and drum brake activated via spoiler control lever aft travel.

afety and operational qualities

*The Silent 2 has light ailerons, light elevator, generous rudder. The roll rate is quick because of the lively feel of the ailerons.
*Stall is predictable and recovery simple. In level flight as airspeed is reduced when approaching the stall speed the sailplane vibrate a little, at this point decreasing the angle of attack results in airspeed increase and normal flight resume, from a climbing attitude the sailplane stall decisively, the nose pitch down gently and recovery is easy with stick forward.
*Spin entry is obvious and recovered with rudder and stick.

pecifications

aerospecs
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met or eng?= met

crew=One pilot
capacity=
length m=6.35
length ft=20
length in=10
span m=13.00
span ft=42
span in=8
swept m=
swept ft=
swept in=
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rot dia m=
rot dia ft=
rot dia in=
dia m=
dia ft=
dia in=
width m=
width ft=
width in=
height m=1.25
height ft=4
height in=1
wing area sqm=8.9
wing area sqft=96
swept area sqm=
swept area sqft=
rot area sqm=
rot area sqft=
volume m3=
volume ft3=
aspect ratio= 20.0
empty weight kg=130
empty weight lb=286
gross weight kg=300
gross weight lb=661
lift kg=
lift lb=

eng1 number=
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max speed kmh=220
max speed mph=138
max speed mach=
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range km=
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endurance h=
endurance min=
ceiling m=
ceiling ft=
glide ratio= 40 at 90 km/h (56 mph)
climb rate ms=
climb rate ftmin=
sink rate ms= 0.60
sink rate ftmin= 118

armament1=
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ee also

aircontent
see also=
related=
* Alisport Silent Club
* Alisport Silent 2 Targa
similar aircraft=
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References

*Silent 2 Flight Manual
*http://www.alisport.com/eu/eng/alianti.htm
*http://www.faa.gov/library/manuals/aircraft/glider_handbook/media/faa-h-8083-13.pdf
*Soaring March 2005
*http://www.glidingmagazine.com/FeatureArticle.asp?id=368
*http://www.alisport.com/eu/images/img_news/Volaresett04/VOLARE_SETT04.htm


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