OTTO DAVID L· ICAO24 a4c96d· last seen May 2026

N4073K is a Steen Aero Lab Skybolt, a single-engine piston aircraft operated by OTTO DAVID L. SkyMeter has tracked 110 flights totalling 45 hours of airtime via ADS-B. The most frequent segment is KOLM to KOLM. Service window in our records spans 366 days. Of those flights, 28 (25.5%) carry at least one detected incident — go-around, unstable approach, stall warning, or runway excursion. The Steen Aero Lab Skybolt has a maximum takeoff weight of 1,800 lb, light wake category.

About the Steen Aero Lab Skybolt

The Steen Skybolt is a high-performance aerobatic biplane sold as a plans-built kit by Steen Aero Lab since the 1970s. Designed by Lamar Steen as a two-seat open-cockpit sport aircraft, the Skybolt combines classic biplane aesthetics with modern aerobatic capability, typically powered by Lycoming engines ranging from 180 to 200 horsepower. Its steel-tube fuselage and wooden wing structure make it a favorite among homebuilders seeking a traditional construction project with spirited performance.

With a roll rate exceeding 180 degrees per second and a never-exceed speed of 230 knots, the Skybolt delivers genuine aerobatic capability in the Pitts Special tradition but with tandem seating and slightly more forgiving handling. The design has proven popular in the experimental aircraft community for its blend of vintage charm and robust aerobatic credentials, often seen at airshows and fly-ins across North America. Hundreds have been completed since the plans were first offered, with builders drawn to its straightforward construction methods and the satisfaction of flying a classic biplane they built themselves.

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

FLIGHTS
110
all time
FLOWN HOURS
45
tracked time
📍
AIRPORTS VISITED
13
unique
📡
CALLSIGNS
1
22 routes
📅
SERVICE PERIOD
05/27/2025 → 05/28/2026
first → last
INCIDENT RATE
25.5%
28 flagged

Top routes

By flight count

10
9
6
5
5
3
3
2
2
1
1

Flight numbers

Most-flown by this airframe

1

Aircraft specifications

Steen Aero Lab Skybolt

Engines
Single Piston
Vref (approach)
65 kt
MTOW
1,800 lb
Wake category
L

Recent flights

Newest 50 operations of N4073K

50
05/28/2026
23m
No alerts
05/28/2026
29m
△ Unstable approach
04/24/2026
24m
No alerts
04/24/2026
31m
△ Unstable approach
03/28/2026
26m
No alerts
03/28/2026
30m
No alerts
01/17/2026
20m
No alerts
01/17/2026
20m
△ Unstable approach
01/05/2026
28m
No alerts
12/09/2025
42m
No alerts
11/20/2025
24m
No alerts
11/09/2025
9m
No alerts
11/08/2025
14m
No alerts
11/08/2025
30m
No alerts
10/29/2025
37m
No alerts
09/24/2025
18m
No alerts
09/24/2025
25m
No alerts
09/21/2025
21m
△ Unstable approach
09/20/2025
11m
No alerts
09/20/2025
42m
No alerts
09/17/2025
21m
△ Unstable approach
09/17/2025
26m
No alerts
09/17/2025
7m
△ Unstable approach
09/16/2025
14m
No alerts
09/16/2025
35m
No alerts
09/08/2025
19m
No alerts
08/25/2025
16m
△ Unstable approach
08/25/2025
23m
No alerts
08/22/2025
27m
No alerts
08/09/2025
23m
△ Unstable approach
08/09/2025
31m
No alerts
08/05/2025
37m
No alerts
07/29/2025
16m
No alerts
07/29/2025
19m
No alerts
07/29/2025
17m
△ Unstable approach
07/29/2025
21m
No alerts
07/12/2025
30m
No alerts
07/08/2025
25m
No alerts
07/06/2025
15m
No alerts
07/06/2025
19m
No alerts
07/01/2025
23m
△ Unstable approach
07/01/2025
11m
△ Unstable approach
07/01/2025
22m
No alerts
06/29/2025
19m
△ Unstable approach
06/29/2025
26m
No alerts
06/28/2025
27m
No alerts
06/19/2025
12m
No alerts
06/19/2025
23m
No alerts
06/19/2025
22m
△ Unstable approach
06/19/2025
26m
No alerts
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