Airports / 4LL9

4LL9 — Alan B. Janssen Airport

Morrisonville, US-IL · US · 642 ft MSL

Runways

1 runway · longest 1,980'

E / W

1,980' × 75'

Surface: Turf / Grass

Select an aircraft to see density altitude estimates

Look up by Tail Number (N-Number) — auto-fills make & model

or select make & model manually

Manufacturer

Model

Outside Air Temp (°C) — blank = ISA standard

What you'll get:

· Density altitude calculation

· Power retained at this elevation/temperature

· Estimated takeoff roll increase

· Climb rate estimate

· Full scenario table (ISA-10 through ISA+40)

Elevation642' MSL

Longest Runway1,980'

SurfaceTURF

Coordinates 39.344, -89.424

Connect with experienced ferry pilots for domestic and international deliveries.