KVYS · Illinois Valley Regional Airport Walter A Duncan Field
Illinois Valley Regional Airport Walter A Duncan Field serves Peru, Illinois at 654 ft elevation with its longest runway, 18/36, at 5,999 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.
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01Runways
| Runway | Length × width | Surface | Lighting |
|---|---|---|---|
| 18/36 | 5,999 × 100 ft | asphalt | lit |
| 07/25 | 3,999 × 75 ft | asphalt | lit |
02Density altitude and turboprop runway margins
Standard temperature at 654 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) | 654 ft | 2,566 ft | 2,179 ft | 3,268 ft |
| Warm day (ISA +10) | 1,854 ft | 2,800 ft | 2,306 ft | 3,458 ft |
| Hot day (ISA +20) | 3,054 ft | 3,034 ft | 2,432 ft | 3,648 ft |
| 35°C afternoon | 3,211 ft | 3,064 ft | 2,449 ft | 3,673 ft |
03Nearby fields with 5,000 ft or more
Useful as alternates, as fuel stops when the price at KVYS is high, or as the longer runway on a hot afternoon.
| Airport | Distance | Longest runway |
|---|---|---|
| KRPJ Rochelle Municipal Airport - Koritz Field | 33 nm N | 5,001 ft |
| KSQI Whiteside County Airport - Joseph H Bittorf Field | 33 nm NW | 6,499 ft |
| KC09 Morris Municipal Airport James R. Washburn field | 33 nm E | 5,501 ft |
| KPNT Pontiac Municipal Airport | 35 nm SE | 5,000 ft |
| KARR Aurora Municipal Airport | 40 nm NE | 6,501 ft |
| KDKB DeKalb Taylor Municipal Airport | 40 nm NE | 7,026 ft |
04Jet A prices and FBOs at KVYS
No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at KVYS, 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 KVYS or read what a fuel stop actually saves.