Grumman G-21A
Multi Piston · 34 active US registrations
Purchase Price
$30K-$200K
Horsepower
450 hp
Fuel Burn
21.9 gph
Cruise Speed
114 kts
Cost/Hour
$218.78/hr
US Fleet
34
Ownership Cost Summary
Purchase
$30K-$200K
Annual Fixed
$10K-$22K
/yr
Hourly Variable
$218.78/hr
/flight hour
5-Year Total
$191K-$529K
Cost estimates based on published data and industry averages. Actual costs vary by condition, location, usage, and maintenance history.0
Specifications & Engine
Performance
Engine & Weights
Source: FAA Type Certificate Data Sheet, ENGINE.txt registry. TBO and overhaul costs from industry standard data.
Market Prices by Year
Typical asking prices. Actual prices vary by condition, total time, avionics, and engine time.
Similar Multi Piston Aircraft
Compare the G-21A to other multi piston aircraft.
Insurance Estimates
Annual hull + liability premiums by pilot experience.
Hangared aircraft save 15-30% on premiums
Covered tiedown vs. open tiedown also affects rates.
Rates are estimates only and vary by hull value, pilot experience, training, location, and carrier. Contact an aviation insurance broker for accurate quotes.
Safety Record
NTSB data, 1982-2025.
7
Total Reports
6
Accidents
4
Fatal
205.9
Per 1K Fleet
Raw NTSB report counts. Not a safety rating. Factors including fleet size, flight hours, pilot demographics, and mission profile affect rates.
Fuel Cost
21.9 gph at ~$6.50/gal 100LL
$142
/hr
$14,235
100 hrs
$28,470
200 hrs
Prices vary by region. View by state.
Fleet & Registration
34
Active US Registrations
Source: FAA Aircraft Registry (active, valid registrations).
More from Grumman
Hangar Cost at Your Airport
Popular Avionics Upgrades
Common avionics upgrades for multi piston aircraft. Prices include typical installation.
GPS / Navigator
Garmin GTN 650Xi
PopularGarmin
$10,800 - $16,000
~20hr install
Avidyne IFD440
Avidyne
$9,000 - $13,000
~14hr install
Avidyne IFD550
Avidyne
$14,000 - $19,000
~16hr install
Garmin GNX 375
Garmin
$6,000 - $8,500
~16hr install
Garmin GTN 750Xi
Garmin
$16,000 - $22,000
~24hr install
Autopilot
S-TEC 3100
PopularGenesys Aerosystems
$15,000 - $20,000
~60hr install
Garmin GFC 600
Garmin
$15,000 - $22,000
~50hr install
Glass Panel / EFIS
Garmin G5
PopularGarmin
$2,200 - $3,500
~8hr install
Garmin G500 TXi
Garmin
$11,000 - $17,000
~30hr install
Aspen EFD1000 Pro MAX
Aspen Avionics
$6,000 - $10,000
~16hr install
Garmin GI 275
Garmin
$3,500 - $5,500
~10hr install
ADS-B Transponder
Garmin GTX 345
PopularGarmin
$4,500 - $6,500
~12hr install
Appareo Stratus ESG
Appareo
$3,000 - $4,500
~10hr install
L3Harris Lynx NGT-9000
L3Harris
$5,000 - $7,500
~14hr install
Engine Monitor
JPI EDM-960
PopularJP Instruments
$7,000 - $11,000
~24hr install
JPI EDM-900
JP Instruments
$2,800 - $4,500
~14hr install
Insight G4
Insight Avionics
$2,500 - $4,000
~12hr install
Electronics International MVP-50P
Electronics International
$4,000 - $6,000
~18hr install
Transponder
Garmin GTX 345
PopularGarmin
$4,500 - $6,500
~12hr install
Garmin GTX 335
Garmin
$3,200 - $4,800
~10hr install
Garmin GTX 345R
Garmin
$4,000 - $6,000
~14hr install
Audio Panel
Garmin GMA 345
PopularGarmin
$2,800 - $4,000
~8hr install
Garmin GMA 245
Garmin
$1,600 - $2,500
~6hr install
PS Engineering PAR200B
PS Engineering
$2,500 - $3,500
~8hr install
Com Radio
Garmin GTR 225A
PopularGarmin
$2,500 - $3,500
~8hr install
Garmin GTR 205
Garmin
$2,000 - $3,000
~10hr install
Trig TY96A
Trig Avionics
$2,800 - $4,000
~8hr install
Prices are approximate installed costs and vary by shop, aircraft, and existing wiring. STC approval may be required. Always verify compatibility with your specific airframe.
Find a Maintenance Shop
4,000+ FAA-certified repair stations across all 50 states.
Browse Maintenance ShopsTools for the Grumman G-21A
Trip Cost Calculator
Estimate fuel & flight costs for any route
Own vs. Rent
Should you buy or keep renting?
Compare Aircraft
Side-by-side cost comparison
Cheapest to Own
See where this ranks in total cost
Should I Buy This?
Score this aircraft 1-100
Partnership Splitter
Split ownership costs with partners
Budget Planner
Month-by-month ownership forecast
Insurance Quotes
Compare premium estimates by experience
What's My Plane Worth?
Estimate market value based on specs
Frequently Asked Questions
How much does a Grumman G-21A cost?
A Grumman G-21A typically sells for $30,000 to $200,000 depending on year, condition, total time, and avionics.
How much does it cost per hour to fly a Grumman G-21A?
The variable cost is approximately $218.78/hr, including fuel, oil, and engine reserve.
What is the fuel burn of a Grumman G-21A?
Approximately 21.9 gallons per hour at normal cruise.
What are the annual costs of owning a Grumman G-21A?
Annual fixed costs run $10,388 to $21,963/yr before fuel and engine reserves.
How much does an engine overhaul cost on a Grumman G-21A?
$84,000 to $130,000, TBO of 1,400 hours.
How fast does a Grumman G-21A fly?
Cruises at approximately 114 knots with a range of 531 nm.
How many Grumman G-21A aircraft are still flying?
There are 34 Grumman G-21A aircraft with active US registrations according to the FAA Aircraft Registry.
Important Disclaimer
All cost estimates, specifications, and data on HangarMath are provided for informational and educational purposes only. This information does not constitute financial, legal, or aviation safety advice. Aircraft ownership involves significant financial risk, and actual costs can vary dramatically from estimates shown here. Always conduct your own due diligence, hire a qualified A&P/IA mechanic for prebuy inspections, consult with an aviation attorney for purchase agreements, and work with a certified financial advisor before making aircraft purchase decisions. HangarMath makes no warranties about the accuracy, completeness, or reliability of any data presented. We are not responsible for any financial losses, property damage, personal injury, or death that may result from decisions made based on information found on this site.