1980
Year
C-GABY — 1980 Thorp T-18
C-GABY is an amateur-built 1980 Thorp T-18 based in CYKM, Ontario, listed on the Transport Canada Civil Aircraft Register (serial 673).
Experimental / homebuilt
Category
Ontario
Based
12
On CA register
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The aircraft
Year built1980 · 46 years old
Airframe typeWhether Transport Canada classes it as an aeroplane, a helicopter, a glider, a balloon or a gyroplane.Aeroplane
Engine typeHow the engine makes power. Piston engines run on avgas like a car engine; turboprops and jets burn turbine fuel, cost far more to overhaul, and are usually reserved for bigger or faster aircraft.Piston
Engines1
Max take-off weightMaximum take-off weight: the heaviest the aircraft may legally be when it starts its take-off roll, including fuel, people and baggage. It's the number that decides what licence and ratings you need, and what it costs to park.682 kg · 1,504 lb
Where it's based
BasedThe city or airport Transport Canada holds as the aircraft's base. Where the field holds a four-letter code like CYXE, that's the airport's ICAO identifier.CYKM, Ontario
Transport Canada officeThe Transport Canada regional office that administers this registration. It follows the owner's address, so it isn't always the nearest office to where the aircraft actually sits.Winnipeg
Identity
Serial numberThe manufacturer's own number for this individual airframe, stamped on a plate. Unlike the registration, it never changes. It identifies the aircraft across every country it's ever been registered in.673
ManufacturerThe full legal name of the company that built it, which is often not the name on the tail. A Cessna 172 built in 2022 was made by Textron Aviation.Gabriel Begin
Built inWhere the aircraft was manufactured. Most of Canada's fleet was built in the United States.Canada
ICAO 24-bit addressA unique 24-bit number your transponder broadcasts with every Mode S and ADS-B message. Flight trackers key on it rather than the tail number. Canada's block runs C00000 to C3FFFF, which is why Canadian aircraft nearly all start C0 to C3. Transport Canada assigns it against the registration, so it changes if the aircraft is re-registered.C044DB
Registration
Registration typePrivate, Commercial or State. Commercial means the registration permits use for hire or reward, like charter, flight training or aerial work. It describes the registration, not who owns the aircraft.Private
AirworthinessAmateur-built: the owner built at least half of it themselves, under Transport Canada's homebuilt standard. It cannot be flown for hire or reward, so no charter, no rental and no paid flight training.Special Certificate of Airworthiness Amateur Built
Basis of registrationThe rule the aircraft is registered under. Most are registered against a type certificate, meaning they're a factory design approved by the regulator; amateur-built and ultralight aircraft come in under their own standards.CAR Standard 549 - Amateur Built Aircraft
Registered sinceWhen the current registration took effect. A recent date usually means the aircraft changed hands or was re-registered. It isn't the year it was built.25 July 2017
Where C-GABY is, and how to track it
C-GABY transmits ADS-B under the 24-bit address C044DB. Trackers key on that address rather than the tail number, so it finds the aircraft even on flights flown under a different callsign. Transport Canada assigns the address against the registration, so it changes if the aircraft is re-registered.
Most private aircraft spend most of their time on the ground. If a tracker shows nothing, it's probably just parked.
The owner of record and the certificate history are on Transport Canada's own lookup: see C-GABY on the Transport Canada register →
How rare is C-GABY?
The Thorp THORP T-18 is rare in Canada. There are 12 on the register.
- 10 of the 12 are in Ontario.
- Half of them were built before 1983. C-GABY is older than most.
- Canada has 15 Thorp aircraft of all models.
- Canada has 4,126 experimental / homebuilt aircraft, 1,312 of them in Ontario.
- 11 aircraft are based at CYKM. See them all →
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Other Thorp THORP T-18 in Canada
C-FTNQ 2008 · C-FPVE 1994 · C-FSBD 1994 · C-FPGK 1993 · C-GEMP 1984 · C-GFPB 1983 · all Thorp THORP T-18 →
Also based at CYKM (CYKM)
C-FJTD Van'S · C-GTFG Van'S · C-GMNA Van'S · C-FTMZ Cessna · C-GVPC Piper · C-GPVI Cessna · all aircraft at CYKM →
Own this aircraft?
You can list C-GABY here for free. We already have the year, make, model, serial and engine from the register, so most of the form is filled in for you. Buyers contact you directly and we take no commission.
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Canadian Civil Aircraft Register, current to September 17, 2026. Aircraft data reproduced and distributed with the permission of the Government of Canada. MarketPlane.ca is not affiliated with Transport Canada.