Grob/E-Systems/AlliedSignal Egrett

__NOTOC__ Infobox Aircraft
name=Egrett/Strato 1


caption=
type=Reconnaissance aircraft
manufacturer=Grob/E-Systems/AlliedSignal
designer=
first flight=24 June 1987
introduced=
retired=
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produced=
number built=6
variants with their own articles=The Grob/E-Systems/AlliedSignal Egrett was a surveillance aircraft developed in Germany in the 1980s by an international partnership. It was intended to fill a joint Luftwaffe-USAF requirement for a high-altitude, long-duration surveillance platform for treaty verification and environmental monitoring. Known as "LAPAS" - "Luftgestütztes, abstandsfähiges Primär-Aufklärungssystem" in Germany and "Senior Guardian" in the US, the programme initially attempted to acquire the Lockheed TR-1 for this role, but when this did not succeed, a new aircraft was sought.

The Egrett (its name derived from the three companies involved in its design: E-Systems, Grobb, and Garrett, the latter firm later changing its name to AlliedSignal) was a conventional mid-wing monoplane with extremely high aspect ratio wings. Power was provided by a single turboprop, and it was equipped with tricycle undercarriage, the main units of which retracted into fairings on the wings.

The initial D-450 Egrett I development aircraft flew in 1987, and in September the following year set a class altitude record of 16,394 m (53,787 ft). Two pre-production machines followed in 1989 and 1990 as the D-500 Egrett II and then fitted out to the finalised D-520 design in 1991. These latter two aircraft were owned by E-Systems and Grob respectively, and used for promotional purposes, E-Systems' for various sensor packages, and Grob's (renamed the Strato 1) to market the design to civil authorities as a resource management platform.

In 1992, the Luftwaffe placed an order for 16 Egrett IIs, including a G 520T two-seat trainer, to be delivered by 2001. However, before much production had taken place, the whole programme was cancelled when Eastern Europe ceased to be perceived as a threat. The two seater was eventually completed, however, and sold to Airborne Research Australia in Adelaide.

pecifications (D-520 Egrett)

aerospecs
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met or eng?= met
crew=One pilot
capacity=
length m=12.20
length ft=40
length in=0
span m=31.40
span ft=103
span in=0
swept m=
swept ft=
swept in=
rot number=
rot dia m=
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width m=
width ft=
width in=
height m=5.80
height ft=19
height in=0
wing area sqm=39.7
wing area sqft=421
swept area sqm=
swept area sqft=
rot area sqm=
rot area sqft=
volume m3=
volume ft3=
aspect ratio=
empty weight kg=3,063
empty weight lb=6,754
gross weight kg=4,700
gross weight lb=10,362
lift kg=
lift lb=
eng1 number=1
eng1 type=AlliedSignal TPE331-14F
eng1 kw= 600
eng1 hp= 800
eng1 kn=
eng1 lbf=
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eng2 number=
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max speed kmh=445
max speed mph=276
max speed mach=
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range km=
range miles=
endurance h= 12
endurance min=
ceiling m=13,715
ceiling ft=45,000
glide ratio=
climb rate ms=7.6
climb rate ftmin=1,500
sink rate ms=
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References

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