Arthur Dunn Air Park traffic pattern

Pattern altitude at Arthur Dunn Air Park (X21) is 830 ft MSL · 800 AGL as published by the FAA, and every runway end is standard left traffic. · Open on the map

All of Arthur Dunn Air Park — 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 X21 reports it.

RWY 15LEFT traffic

Heading: 154° mag · 149° true
Dimensions: 3,026 × 70 ft
TPA: 830 ft MSL · 800 AGL · charted
Surface: Asphalt
Lights: 2-light PAPI (left) (3.75°)
CTAF: 123.0

Enter the left downwind (heading 334°) on the 45° at 830 ft MSL.

More details — RWY 15

Threshold elev: 24 ft
Markings: nonprecision
Approach obstacle: Pole, 51 ft, 1,115 ft from threshold, 145 ft R of centerline — 17:1 slope to clear · penetrates the 20:1 visual approach surface
Threshold crossing height: 45 ft
TDZ elevation: 30 ft

Condition: Fair. Edge lights: Med. Weight bearing: Single wheel 12k. PCN 13.

Pattern side: FAA NASR · TPA charted (NASR) · layout: schematic (headings + lengths)

Pattern direction by runway

Runway	Pattern	Heading	Pattern altitude
04U	Left traffic	037° mag	830 ft MSL · 800 AGL
22U	Left traffic	217° mag	830 ft MSL · 800 AGL
15	Left traffic	154° mag	830 ft MSL · 800 AGL
33	Left traffic	334° mag	830 ft MSL · 800 AGL

Pattern altitude is published for X21 in the FAA NASR data. Headings are the runway alignment; downwind is the reciprocal.

Flying the pattern at X21

Arthur Dunn Air Park 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 X21?

The FAA publishes a traffic pattern altitude of 800 ft AGL for Arthur Dunn Air Park, which is 830 ft MSL on the altimeter with the field at 30 ft.

Does X21 have right traffic?

No. All 4 runway ends at Arthur Dunn Air Park use standard left traffic, so no right pattern is charted here.

What frequency is the pattern on at X21?

Arthur Dunn Air Park 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 X21

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.