(?) Sievers and Phillip Miller built the Sievers-Miller Special circa 1970, registered N1175. It was a single place, open cockpit.
Post WW2
Sievers-Miller
(?) Sievers and Phillip Miller,
Valley City NC.
USA
Built the Sievers-Miller Special circa 1970.
Siersma SRC-1
Designed by Earl Chelsea, Gerard Rogers and Herman Siersma, the 1962 Siersma SRC-1 was a single-place cabin, mid-wing monoplane midget racer,
Eleven years in construction, it was registered N4190C and first flew on 2 February 1962.
Engine: 85hp Continental C-85-12J
Wingspan: 17’0″
Length: 20’0″
Useful load: 330 lb
Max speed: 200 mph
Cruise: 170 mph
Stall: 85 mph
Range: 500 mi
Seats: 1
Siersma, Herman
Detroit MI.
USA
Built the Siersma SRC-1 in 1962.
Siemetzki Asro 4
The ASRO-3 was used to develop the ultra-light side-by-side two-seater ASRO-4. Of welded steel tube construction covered with light-alloy, it had a fully enclosed fuselage pod and tapered tubular tailboom. It was fitted with an 130 shp BMW 6012 turboshaft mounted behind the rotor gearbox driving three-blade main and two-bladed tail rotors of composite construction.
The ASRO 4 was first displayed at the 1964 Hanover Air Show.
This machine flew in May 1964, and was tested for some while before being abandoned without achieving certification.
ASRO 4
Engine: BMW 6012, 100/130hp
Rotor diameter: 7.22m
Rotor disk area: 403.45 sq.ft (37.48 sq.m)
Fuselage length: 5.78m
Height: 7 ft 11 in (2.41 m)
Empty weight: 840 lb
Max takeoff weight: 1,360 lb
Max speed: 99 mph / 160km/h
Cruise speed: 90 mph (144 kmh)
Climb: 985 ft (300 m)/min
Service ceiling: 12,467 ft (3,800 m)
Endurance: 1 hr 20 min
Siemetzki Asro 3
Alfons Siemetzki of Kirchdorf am Iller, privately-built the ASRO 3T ultra-light single-seater. This experimental helicopter was an open-frame steel-tube machine of conventional layout, with a rudimentary windshield to protect the pilot, a skid undercarriage and a 65 shp BMW 6002 turboshaft engine mounted amidships. A conventional rotor system, with two-blade main and tail rotors.
The single-seat ASRO 3-T was built by Alfons Siemetzki and made its first flight on 29 December 1961, piloted by USAF Captain Stanley Frick.
The ASRO-3 was used to develop the ASRO-4
Siemetzki, Alfons / Asro
Germany
Known also as Asro, and from Asro T-3 prototype single-seat turbine-powered helicopter (first flown December 1961) Siemetzki developed Asro 4 turbine-powered two-seater, ground tests of which began May 1964.
Siegrist RS1 Ilse
The 1971 Siegrist RS1 Ilse was a four-place cabin high-wing monoplane, built by Rudolf Siegrist. Registered N3087, it first flew in June 1971.
Engine: 180hp Lycoming O-360
Wingspan: 28’0″
Length: 21’6″
Useful load: 907 lb
Max speed: 170 mph
Cruise: 150 mph
Stall: 73 mp h
Seats: 4
Siegrist, Rudolf
Parma OH.
USA
Built the Siegrist RS1 Ilse in 1971.
Siebert Sie 3
This wooden Standard Class single-seater was designed by Paul Siebert and first flew in prototype form in 1971; by January 1975 a total of 27 had been built by the Paul Siebert Sportund Segelflugzeugbau and sold to Belgium, Holland, Denmark and Portugal as well as to customers in Germany. Permission was being sought from the Luftfahrtbundesamt, the Federal German civil aviation authority, to offer the Sie 3 in a form suitable for amateur construction. Of conventional wooden construction, the Sie 3 is a cantilever high wing monoplane with a constant chord centre section and tapered outer panels; Schempp-Hirth aluminium air brakes are featured. The fin and rudder are swept back and the low-set tailplane is an all-moving surface. Landing gear consists of a monowheel with brake and a tailskid, and the pilot sits under a one-piece flush-fitting cockpit canopy.
Span: 49 ft 2.5 in
Length: 22 ft 0 in
Height: 3 ft 11 in
Wing area: 127.44 sqft
Empty weight: 467 lb
Max weight: 750 lb
Max speed: 124 mph (in smooth air)
Min sinking speed: 2.23 ft/sec at 48.5 mph
Best glide ratio: 34.3:1 at 56 mph
All Aero 