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

Sierra / Aircraft Industries BLW-1 / BLW-2

Sierra San Franciscan NR7713

Designed by H Sherman Tharpe, two 1929 Sierra were built with ATC 2-151. Priced at $8,000 and designated BLW-1 and BLW-2 registered NX215H and NX/NR7713, the latter as San Franciscan in unsuccessful endurance record attempts June-Aug 1929 at Mills Field, San Francisco (piloted by Jim Warner). It is said to have been sold after WW2 to someone in South America.

The design reappeared in the Hawke Duster.

Engine: 130hp Comet
Wingspan: 36’0″
Length: 25’8″
Useful load: 909 lb
Max speed: 125 mph
Cruise: 100 mph
Stall: 47 mph
Range: 400 mi
Seats: 3

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