Waco Aircraft Company Ymf (WACC)
ICAO WACC Light Piston

Waco Aircraft Company Ymf

Single Piston

The Waco YMF is a modern recreation of the classic American open-cockpit biplane, built by the revived Waco Aircraft Company in Battle Creek, Michigan since 1986. While the original Waco biplanes dominated barnstorming and early commercial aviation in the 1920s and 1930s, today's YMF faithfully captures that golden-age aesthetic with contemporary materials and powerplants: typically a Jacobs R-755 radial engine producing 275 horsepower, though some variants use the Continental W-670. The aircraft seats two in tandem configuration with dual controls, making it popular for aerobatic training, warbird enthusiasts, and nostalgic sightseeing operations. The YMF's performance envelope reflects its heritage: a cruise speed around 105 knots, a never-exceed speed of 158 knots, and a stall speed as low as 42 knots with full flaps. Maximum takeoff weight is 2,650 pounds, and the biplane configuration delivers exceptional slow-flight handling and short-field capability. The aircraft's rugged steel-tube fuselage and fabric-covered wings follow traditional construction methods, though modern avionics and safety features bring it into compliance with current certification standards. With its distinctive radial engine rumble and classic lines, the YMF remains one of the few production biplanes still manufactured today. SkyMeter has tracked 7 flights across 4 airframes and 4 operators, with MARBELLA BLUE LLC the largest observed operator.

✈
ACTIVE AIRFRAMES
4
last 7 days
🏢
OPERATORS
4
unique airlines
📊
FLIGHTS
7
tracked
⏱
AVG DURATION
53m
per flight
⚠
INCIDENT RATE
14.3%
1 flagged
ⓘ

Safety in context

The incident rate counts flights with ANY safety event detected by SkyMeter: go-arounds (a routine response, not a failure), unstable-approach gate flags (advisory thresholds), rejected takeoffs (the system working as designed), and runway events. It is NOT an accident rate or fatality rate. For accident statistics, refer to the NTSB Aviation Accident Database (USA) or the Aviation Safety Network. See methodology for what each event type measures.

Performance

Speed envelope & approach

Vref
55 kt
Vref range
—
Vmo
—
Mmo
—
Vne
158 kt
Vno
135 kt
Vs0 (landing)
42 kt
Vfe
87 kt
Approach category
—

Dimensions

Airframe geometry

Wingspan
—
Length
—
Tail height
—
Wheelbase
—
Gear width
—
Wake category
L

Weight & identification

Operating limits

MTOW
2,650 lb
MALW
—
Manufacturer model
YMF
FAA designator
—
Registered
—

Recent incidents

Flagged flights of WACC

20
10/12/2026
1h 34m
△ Low approach-stability score
9/28/2026
24m
△ Low approach-stability score
9/27/2026
1h 11m
△ Low approach-stability score
9/26/2026
32m
△ Low approach-stability score
9/24/2026
28m
△ Low approach-stability score
9/12/2026
19m
△ Low approach-stability score
9/11/2026
58m
△ Low approach-stability score
8/20/2026
38m
△ Low approach-stability score
8/8/2026
25m
△ Low approach-stability score
7/26/2026
2h 6m
⛨ TFR entry

Recent flights

Real flights of WACC · airborne ≥ 20 min

30
10/12/2026
1h 34m
△ Low approach-stability score
10/9/2026
1h 44m
No alerts
10/8/2026
1h 11m
No alerts
10/8/2026
26m
No alerts
10/7/2026
57m
No alerts
10/4/2026
25m
No alerts
10/4/2026
22m
No alerts
10/4/2026
20m
No alerts
10/3/2026
29m
No alerts
9/30/2026
28m
No alerts
9/30/2026
20m
No alerts
9/29/2026
21m
No alerts
9/28/2026
20m
No alerts
9/28/2026
24m
△ Low approach-stability score
9/27/2026
1h 11m
△ Low approach-stability score
9/27/2026
35m
No alerts
9/26/2026
34m
No alerts
9/26/2026
32m
△ Low approach-stability score
9/26/2026
34m
No alerts
9/24/2026
30m
No alerts
9/24/2026
47m
No alerts
9/24/2026
28m
△ Low approach-stability score
9/24/2026
29m
No alerts
9/23/2026
26m
No alerts
9/23/2026
57m
No alerts
9/23/2026
21m
No alerts
9/22/2026
57m
No alerts
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© SkyMeter · All flight data subject to ODbL attribution · Tracking window: 7 days (free tier)