1930’s
A Sligo man (Charles Foley) was active in aircraft design in the early 30’s and on Oct 4th 1932 he applied for a UK patent on a device which he described as “Improvements in or relating to aircraft”. This patent [Ref: GB 390432 (A)] was granted on April 6th 1933 – although it is unclear if the device was ever used by any of the aircraft manufacturers. Local hearsay indicates that Foley attempted to fly an aircraft at Hazelwood Co. Sligo in 1933 and while it became airborne it was a short-lived flight and crashed into the adjoining field. In the mid 30’s a number of “Flying Circus” shows visited Sligo and operated from a large field at Scardanmore on the Strandhill Road. During the first of these events a branch of the Irish
Aero Club was founded in Sligo – the first branch outside of Dublin.
1940’s
Sligo, like many Western seaboard counties, saw a considerable increase in aviation activity during the 2nd World War years.
The adjacent “Donegal Corridor” – a route agreed by the Great Britain and Ireland governments – to facilitate US and UK aircraft routing to and from bases at Lough Erne, Co. Fermanagh. This route entered and exited the Irish Republic at Ballyshannon / Bundoran and consequently saw quite a few mishaps – mostly due to fuel shortages or poor weather.
Most of the aircraft were flying boats based at Castle Archdale on Lough Erne – and included American Catalinas and the huge Sunderlands which were built by Shorts in Belfast
It was a Catalina from Lough Erne that spotted the notorious German battleship “Bismarck” out in the Atlantic – and this led to her demise by the British Navy who had been in pursuit but had lost contact in heavy fog. In Dec 1943 a Flying Fortress bomber being delivered from the US crashed on high ground in very poor weather near Ballintrillick Co. Sligo – resulting in a number of fatalities – but had eight survivors. Much of the search and recovery in this incident was carried out by the military personnel based at Finner Camp. The personnel used a lot of scarce wartime resources during the recovery – for which they claimed replacements from Military Headquarters. This included a ½ pound of tea for a local woman (Mrs Rooney) “who provided refreshment for the crew and stretcher bearers on the night of the crash”
In 1949 local Sligo business man K.P. Murray commenced pilot training at Weston in a BA Swallow (EI-ADS) under the tutelage of Capt. P.W. Kennedy. He soloed in 5hrs:30mins.
Mr.Murray subsequently purchased a BA Swallow (EI-AFF) which he operated from Rosses Point where he had a grass strip and hangar adjacent to the Co. Sligo Golf Club championship links course.
1950’s Pictured right at the Rosses Point airstrip are the Swallow (EI-AFF) aircraft and a 4 seater Miles Messenger (EI- AGB) which were owned by K.P.Murray during the early 1950’s. This was followed by another Messenger in 1953 (EI-AGE).
Murray, who was a many times Irish Motoring Champion (Test Trials), based the aircraft at Rosses Point where he had a grass strip and hangar adjacent to the Co. Sligo Golf Club championship links course. He was well known for his aerial photography – mostly using a camera mounted underneath the aircraft and operated from the cockpit – and he has left a unique pictorial record of many buildings, infrastructural projects and general views in the 
North West region.
Murray was involved in the rescue of three men from the Blackrock Lighthouse in Sligo Bay in October 1956. An unexpected change in weather had left the men stranded and without food. Murray, accompanied by fellow Sligo man Comt. P. Ferguson (ex Irish Air Corps), flew over the lighthouse and observed the men who were signalling that they required food.
Before any food could be dropped an RAF helicopter ( a Westland Dragonfly) arrived from Derry and lifted the men to safety.
1960’s
In the 1960’s the nearest club flying activity to Sligo was at Castlebar Airport. Here, in 1968, a hard-surface runway was completed and a new training aircraft - a Piper Cherokee 140
(EI-ATK) - was purchased for training pilots. Many of the early Sligo pilots trained at Castlebar and subsequently formed Sligo Aero Club in 1975. One of these pilots local man, Gerry O’Hara, who from an early age had been constructing hand launched model aircraft began building a full size aircraft in 1966. This, low wing monoplane, although never engined, was shown as a static display at an airshow at Sligo Airport in 1978.
1970’s
O’Hara also constructed a gyrocopter which he first flew in 1971. He built the entire airframe and rotor blade himself and carried out extensive “tethered” testing before being towed in to the air at Culleenamore Beach in Strandhill, Sligo in 1971. Gerry is pictured on the right during the first flight.
Sligo Aero Club was formed in 1975 and operated from a grass strip at Coolaney, Co. Sligo. It started operations using a Rallye MS880B. It moved to the present Sligo Airport location in 1978 and quickly the number of private aircraft based at Sligo grew to 11 within a year or so- with an interesting mix of Rallyes, Cessna, Piper and various tail-wheel aircraft.
1980s
In 1984 psychologist Dr Brendan McGann – a former Aer Lingus B707 Navigator – started a youth training program at Sligo airport in conjunction with the Youth Employment Agency. This group (known as Air Alpha) built a number of all metal Zenith kits fitted with Lycoming engines - the first of which flew in 1985 (EI-BKM). Others built under this scheme included EI-BKP and EI-BYL - a CH-250 .
In the meantime Gerry O’Hara was busy building a Rand KR2. This wood and fibreglass aircraft, fitted with a Volkswagen engine was completed in 1986 and made its first flight on February 19th of that year.
It was featured in the renowned American magazine “Sport Aviation” as well as being the subject of an RTE documentary in 1989.
1990’s
Surrounded by a now fully developed commercial airport , which had Iona, Avair, Aer Lingus and Ryanair as operators, the aircraft building skills of the Sligo Aero Club members and other young persons were put to use once again – this time building a series of Vans RV aircraft.
These were all constructed under the watchful eye of the UK PFA and resulted in a considerable number of local young people gaining experience in aircraft construction techniques. This experience was authenticated by the UK City & Guilds and most of the persons involved went on to secure employment with large aircraft maintenance organisations.
Sligo Aero Club continued to thrive now having moved to Cessna aircraft as the preferred trainers and having a membership of almost 100 at its peak in 2005.