MONOSPAR ST.10 to ST.25

Title:  Monospar ST.210 to ST.25

The Monospar ST series was a 1930’s British twin-engined monoplane built by General Aircraft Ltd using the “monospar” wing construction patented by H J Steiger, the Swiss inventor of the concept. (How the structure works is explained in the manual.) The ST.4 was the first production version, followed by the ST.6 which introduced manually retractable undercarriage. Then came the ST.10 (more powerful engines and other refinements), the ST.11 (two aircraft for export to Australia) and the ST.12 (De Havilland Gypsy Major engines). The ST.25 was the final and largest of the Monospar series of aircraft and between 1935 and 1939 around 60 examples were built.

This title includes the manufacturer’s Instruction manuals for the Monospar ST.10.,ST.11,ST.12 aircraft and the ST.25 aircraft, along with manual for the Pobjoy Niagara air-cooled radial aero engine which powers the ST.25, and additionally a NACA aircraft circular describing an earlier Monospar model. The files have been scanned from the original manuals and retain any colour pages.