The HAC1 Mayfly winning the Selfridge Cup, at the Bristol Air Pageant on June 22, 1927, piloted by Flt Lt le Poer Trench.
A close-up of the Mayfly’s 32 h.p. Bristol Cherub engine and Fairey-Reed metal propeller.
DAVID AND GOLIATH: Considerable amusement was caused at Bournemouth on Whit Monday by a heat in which the Halton "Mayfly" (30-h.p. Bristol "Cherub") (shown) was racing against the Vickers "Vixen III" (500 h.p. Napier "Lion").
The Minus during its appearance with the RAF "new types" at the 1928 Hendon Display.
The HAC2 Minus with streamlined struts and a spinner added.
The Halton monoplane H.A.C.2 "Minus" (31-h.p. Bristol "Cherub III") landing in the circle, flown by Flight-Lieut. Le Poer Trench.
A fine view of Flt Lt Le Poer Trench in the Minus at the Cambridge Aero Club's display, June 10-11, 1929.
Four views of the Mayfly early in its life. Note the forward, unfaired, passenger seat and the unconventional interplane struts.
The Mayfly at Bournemouth on June 4-6, 1927, with the forward cockpit faired over.
HALTON H.A.C.1: Amateur-built Light Plane, with 30 h.p. Bristol "Cherub" Engine.
The Minus at Bristol Air Pageant, May 5, 1928. Note the unfaired struts and absence of a spinner.
The No 13 proved unlucky for the Minus in the 1929 King’s Cup Race.
A contemporary impression, by the author, of the completed aircraft.