KGPC · Putnam County Airport

GREENCASTLE, INDIANA · SMALL AIRPORT

842

Elevation ft

Runway

5,002

Longest ft · 18/36

39.63N

86.81W

Putnam County Airport serves Greencastle, Indiana at 842 ft elevation with its longest runway, 18/36, at 5,002 by 100 ft. The figures below are computed from FAA NASR runway data (via OurAirports) and the same rules of thumb JetDesk uses on the airport page in the app; the POH and current NOTAMs are the authority.

Open KGPC in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
18/36	5,002 × 100 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 842 ft is about 13°C. Every 1,000 ft of density altitude adds roughly 8 percent to a turboprop's takeoff distance and 5 percent to its landing distance. The table uses Piper Meridian book numbers (2,438 ft takeoff and 2,110 ft landing over a 50 ft obstacle at sea level, ISA, max weight) as a reference airplane; heavier turboprops and light jets scale the same way from their own POH figures.

Conditions	Density altitude	Takeoff est.	Landing est.	Landing × 1.5
Standard day (ISA, 13°C)	842 ft	2,602 ft	2,199 ft	3,298 ft
Warm day (ISA +10)	2,042 ft	2,836 ft	2,325 ft	3,488 ft
Hot day (ISA +20)	3,242 ft	3,070 ft	2,452 ft	3,678 ft
35°C afternoon	3,444 ft	3,110 ft	2,473 ft	3,710 ft

Planning aid only. Even on a 35°C afternoon the longest runway (18/36, 5,002 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,710 ft needed). The percentages are a generic rule of thumb applied to one reference airplane, not certified performance data for any specific aircraft, and the runway size categories describe the runway, not your airplane's suitability. Verify with the approved flight manual before every flight.

03Nearby fields with 5,000 ft or more

Useful as alternates, as fuel stops when the price at KGPC is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KCFJ Crawfordsville Regional Airport	21 nm N	5,506 ft
KIND Indianapolis International Airport	25 nm E	11,200 ft
KHUF Terre Haute Regional Airport, Hulman Field	25 nm SW	9,021 ft
KBMG Monroe County Airport	31 nm S	6,500 ft
KHFY Indy South Greenwood Airport	34 nm E	5,102 ft
KTYQ Indianapolis Executive Airport	35 nm NE	7,001 ft

04Jet A prices and FBOs at KGPC

No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at KGPC, the app flags a price stale after two weeks, and the route finder ranks every field within a corridor of your route by net savings after the cost of the extra cycle. Log a price at KGPC or read what a fuel stop actually saves.

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