KM21 · Muhlenberg County Airport

GREENVILLE, KENTUCKY · SMALL AIRPORT

422

Elevation ft

Runway

5,000

Longest ft · 05/23

37.23N

87.16W

Muhlenberg County Airport serves Greenville, Kentucky at 422 ft elevation with its longest runway, 05/23, at 5,000 by 75 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.

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01Runways

Runway	Length × width	Surface	Lighting
05/23	5,000 × 75 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 422 ft is about 14°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, 14°C)	422 ft	2,520 ft	2,155 ft	3,232 ft
Warm day (ISA +10)	1,622 ft	2,754 ft	2,281 ft	3,422 ft
Hot day (ISA +20)	2,822 ft	2,988 ft	2,408 ft	3,612 ft
35°C afternoon	2,923 ft	3,008 ft	2,418 ft	3,628 ft

Planning aid only. Even on a 35°C afternoon the longest runway (05/23, 5,000 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,628 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 KM21 is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
2I0 Madisonville Regional Airport	14 nm NW	6,051 ft
KJQD Ohio County Airport	20 nm NE	5,003 ft
KHVC Hopkinsville Christian County Airport	26 nm SW	5,505 ft
KOWB Owensboro Daviess County Airport	31 nm N	8,000 ft
KCKV Clarksville–Montgomery County Regional Airport	38 nm S	5,999 ft

04Jet A prices and FBOs at KM21

No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at KM21, 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 KM21 or read what a fuel stop actually saves.

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