Illinois Valley Regional Airport Walter A Duncan Field traffic pattern

Pattern altitude at Illinois Valley Regional Airport Walter A Duncan Field (VYS · KVYS) is 1,700 ft MSL (≈1,000 AGL) by the standard convention — none is published for this field, and every runway end is standard left traffic.

All of Illinois Valley Regional Airport Walter A Duncan Field — runways, frequencies, charts and live weather

Pattern diagram

Drawn to scale from the FAA NASR runway alignments and the per end right traffic flags — pick a runway to see its pattern. Live wind picks the favored runway when KVYS reports it.

RWY 18LEFT traffic

Heading: 183° mag · 180° true
Dimensions: 5,999 × 100 ft
TPA: 1,700 ft MSL (≈1,000 AGL) · standard
Surface: Asphalt
CTAF: 123.0

Enter the left downwind (heading 003°) on the 45° at 1,700 ft MSL (≈1,000 AGL).

More details — RWY 18

Threshold elev: 654 ft
Markings: nonprecision
TDZ elevation: 654 ft

Condition: Good. Edge lights: Med. Weight bearing: Single wheel 24k, Double wheel 70k.

Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates

Pattern direction by runway

Runway	Pattern	Heading	Pattern altitude
07	Left traffic	077° mag	1,700 ft MSL (≈1,000 AGL)
25	Left traffic	257° mag	1,700 ft MSL (≈1,000 AGL)
18	Left traffic	183° mag	1,700 ft MSL (≈1,000 AGL)
36	Left traffic	003° mag	1,700 ft MSL (≈1,000 AGL)

No pattern altitude is published for KVYS; the figure above is the AC 90-66B 1,000 ft AGL convention for propeller aircraft, rounded to the field. Turbine aircraft normally fly 1,500 ft AGL. Headings are the runway alignment; downwind is the reciprocal.

Flying the pattern at KVYS

Illinois Valley Regional Airport Walter A Duncan Field is non towered, so the pattern is self announced on CTAF 123.0. AC 90-66B asks for a report on entry and on each leg, and for the standard 45° entry to downwind at pattern altitude.

All ends are left traffic, which is the FAR 91.126 default — turns to the left unless the field charts otherwise. The full entry procedure is here →

Frequently asked

What is the traffic pattern altitude at KVYS?

Illinois Valley Regional Airport Walter A Duncan Field has no traffic pattern altitude published in the FAA NASR data. The AC 90-66B convention for propeller aircraft is 1,000 ft AGL, which works out to roughly 1,700 ft MSL (≈1,000 AGL) here — but confirm it against the Chart Supplement before you fly, since a field can have a non standard pattern altitude that NASR does not carry.

Does KVYS have right traffic?

No. All 4 runway ends at Illinois Valley Regional Airport Walter A Duncan Field use standard left traffic, so no right pattern is charted here.

What frequency is the pattern on at KVYS?

Illinois Valley Regional Airport Walter A Duncan Field is non towered, so pattern position reports go on the CTAF, 123.0. AC 90-66B asks for self announcing on entry and on each leg.

More about KVYS

Pattern direction and alignment are drawn from the FAA NASR (28-day cycle); the diagram is generated, not an FAA chart. Pattern altitude is shown as published where NASR carries one, otherwise as the AC 90-66B 1,000 ft AGL convention. For planning and education only; always verify against the Chart Supplement.