Grumman G-21 Goose (G21)
ICAO G21 Light Piston

Grumman G-21 Goose

Twin Piston

The Grumman G-21 Goose is a twin-engine amphibious aircraft that became one of aviation's most beloved flying boats when it entered service in 1937. Originally designed as a commuter aircraft for wealthy Long Island businessmen who needed to reach Manhattan by water, the Goose combined the practicality of a seaplane with the comfort of a cabin-class aircraft, seating up to eight passengers. Its distinctive high-wing configuration, retractable landing gear, and boat-like hull made it equally at home on water, land, or remote wilderness strips. During World War II, the U.S. military adopted hundreds of Gooses for transport, reconnaissance, and air-sea rescue missions, cementing its reputation for rugged reliability. After the war, surplus Gooses found new life in bush operations across Alaska, Canada, and the Caribbean, where their amphibious capability made them indispensable for reaching communities without runways. Powered by two Pratt & Whitney R-985 radial engines producing 450 horsepower each, the Goose cruises at around 160 knots with a range of approximately 640 nautical miles. Its stall speed of 55 knots in landing configuration and never-exceed speed of 190 knots define a forgiving flight envelope well-suited to backcountry operations. Nearly nine decades after its first flight, the Goose remains in active service with operators who value its unique blend of versatility, nostalgia, and go-anywhere capability. SkyMeter has tracked 10 flights across 2 airframes and 2 operators over routes, with SNOW GOOSE AVIATION LLC the most frequently observed operator.

ACTIVE AIRFRAMES
2
last 7 days
🏢
OPERATORS
2
unique airlines
📊
FLIGHTS
10
tracked
AVG DURATION
22m
per flight
INCIDENT RATE
10.0%
1 flagged

Safety in context

The incident rate counts flights with ANY safety event detected by SkyMeter — go-arounds (a routine response, not a failure), unstable-approach gate flags (advisory thresholds), rejected takeoffs (the system working as designed), and runway events. It is NOT an accident rate or fatality rate. For accident statistics, refer to the NTSB Aviation Accident Database (USA) or the Aviation Safety Network. See methodology for what each event type measures.

Performance

Speed envelope & approach

Vref
65 kt
Vref range
Vmo
Mmo
Vne
190 kt
Vno
160 kt
Vs0 (landing)
55 kt
Vfe
100 kt
Approach category

Dimensions

Airframe geometry

Wingspan
Length
Tail height
Wheelbase
Gear width
Wake category
L

Weight & identification

Operating limits

MTOW
8,000 lb
MALW
Manufacturer model
G-21 Goose
FAA designator
Registered

Recent incidents

Flagged flights of G21

20
06/26/2026
30m
△ Unstable approach
06/03/2026
20m
△ Unstable approach
05/28/2026
46m
△ Unstable approach
05/19/2026
2h 48m
△ Unstable approach
05/14/2026
58m
△ Unstable approach
09/21/2025
1h 0m
△ Unstable approach
09/20/2025
35m
△ Unstable approach
09/19/2025
1h 59m
△ Unstable approach
09/16/2025
39m
△ Unstable approach
09/12/2025
1h 3m
△ Unstable approach

Recent flights

Real flights of G21 · airborne ≥ 20 min

30
07/01/2026
36m
No alerts
07/01/2026
36m
No alerts
07/01/2026
1h 48m
No alerts
06/28/2026
20m
No alerts
06/27/2026
57m
No alerts
06/27/2026
54m
No alerts
06/26/2026
30m
△ Unstable approach
06/19/2026
1h 8m
No alerts
06/18/2026
36m
No alerts
06/16/2026
41m
No alerts
06/15/2026
48m
No alerts
06/15/2026
2h 41m
No alerts
06/04/2026
1h 15m
No alerts
06/03/2026
1h 47m
No alerts
06/03/2026
20m
△ Unstable approach
05/31/2026
38m
No alerts
05/31/2026
1h 5m
No alerts
05/31/2026
26m
No alerts
05/30/2026
27m
No alerts
05/30/2026
32m
No alerts
05/30/2026
34m
No alerts
05/30/2026
24m
No alerts
05/29/2026
20m
No alerts
05/29/2026
57m
No alerts
05/28/2026
37m
No alerts
05/28/2026
46m
△ Unstable approach
05/27/2026
29m
No alerts
05/27/2026
25m
No alerts
05/26/2026
32m
No alerts
05/25/2026
1h 14m
No alerts
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© SkyMeter · All flight data subject to ODbL attribution · Tracking window: 7 days (free tier)