My original source was, I believe, Maple Leaf several years ago. That article was quite definite that 1 Transport Helicopter Platoon was the first Tac Hel unit in the CF. I accepted it as fact but it may not have been so much.
From http://www.hillmanweb.com/rivers/07.html:
In December 1963, No. 1 Transport Helicopter Platoon (No. 1 THP), a unit of the Royal Canadian Army Service Corps, was established at RCAF Station Rivers, along with their fleet of CH-113A Voyageur transport helicopters and one CH-112 Nomad.
So, out by one year on that (either the article was or I have slipped a year on my calendar notation somehow), as backed up by http://www.militarybruce.com/published_news/rivers-air-base.html which also states that:
by 1956, Army helicopter pilots were also training at Rivers at the Army Air Tactical Training School (AATTS).
But what were those pilots flying operationally in the late fifties?
From http://www.airforce.forces.gc.ca/v2/equip/hst/nomad-eng.asp
The Hiller UH-12E Nomad served from 1961 to 1972, primarily with the Air Observation Post (A.O.P.) troops in Petawawa, Shilo, Gagetown, and Germany.
Although, from what I was told when arriving at 427 Squadron in 1982, Kiowas replaced L19s and Cessna 172s there in the AOP role. There was still sigs wire laid by these aircraft hanging in some tree tops.
http://rcaf.com/Aircraft/aircraftDetail.php?NOMAD-174 only specifies 4 Brigade in:
Some of these helicopters provided reconnaissance and liaison facilities for No. 4 Canadian Infantry Brigade Group in Germany.
http://www.rotorhead.org/military/nomad.asp does not mention 4 Brigade at all, just Pet and Rivers:
The Canadian Military bought 27 Nomads in 1961. The Hiller Nomad served from 1961 to 1972, primarily with the Air Observation Post in Petawawa, Ontario, Canada. One other notable area of use was the Army Aviation Tactical Training School in Rivers, Manitoba, Canada.
http://www.ody.ca/~bwalker/CAF_Hiller_details.html has the most detail, giving short histories for each CH112. The only operational use is listed as RCD in Lahr. That backs up the account of L19s and Cessna 172s as the only AOP aircraft in Petawawa and elsewhere. Unfortunately, the earliest dates for each of the Hiller accounts is 11 June 1970, at which time they were all renumbered into the current tail number system, and no mention of when they commenced operational service in Lahr.
http://www.manitobamilitaryaviationmuseum.com/PDF/CJATCRivers.pdf discusses training Army pilots for L19s and helicopter conversions, but does not mention operational helicopter flying in any detail.
Okay, Tac Hel's true birthday is now uncertain, and I have amended my calendar to reflect 1 Thump's correct birthday. There are gaps in readily available information.
I did learn that Stanley Hiller built his first helicopter at the age of nineteen. Some interesting photographs of his designs can be found at http://www.helis.com/timeline/hiller.php