THEISS SHAWN M· ICAO24 a1b5eb· last seen 12h ago

N20908 is a Waco Aircraft Company YMF, a single-engine piston aircraft operated by THEISS SHAWN M. SkyMeter has tracked 30 flights totalling 13 hours of airtime via ADS-B across 2 callsigns. The most frequent segment is KS67 to KS67. Service window in our records spans 415 days. The Waco Aircraft Company YMF has a maximum takeoff weight of 2,650 lb, light wake category.

About the Waco Aircraft Company YMF

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 flights across airframes and operators, with the largest observed operator.

FLIGHTS
30
all time
FLOWN HOURS
13
tracked time
📍
AIRPORTS VISITED
19
unique
📡
CALLSIGNS
2
14 routes
📅
SERVICE PERIOD
6/26/2025 → 8/16/2026
first → last
INCIDENT RATE
0.0%
0 flagged

Top routes

By flight count

8
2
1
1
29OH 2D7
1
1
6LL8 3KK
1
1
1

Flight numbers

Most-flown by this airframe

2

Aircraft specifications

Waco Aircraft Company YMF

Engines
Single Piston
Vref (approach)
55 kt
MTOW
2,650 lb
Wake category
L

Recent flights

Newest 15 operations of N20908

15
8/16/2026
30m
No alerts
8/14/2026
30m
No alerts
8/1/2026
27m
No alerts
7/10/2026
24m
No alerts
6/12/2026
16m
No alerts
5/23/2026
30m
No alerts
5/23/2026
8m
No alerts
5/22/2026
14m
No alerts
5/22/2026
11m
No alerts
5/22/2026
3m
No alerts
9/20/2025
26m
No alerts
9/20/2025
1h 6m
No alerts
9/20/2025
1h 6m
No alerts
6/26/2025
15m
No alerts
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