OSTGARD WILLIAM R· ICAO24 a4d196· last seen 7d ago

N4098X is a Vought V-10 Vanguard, a single-engine piston aircraft operated by OSTGARD WILLIAM R. SkyMeter has tracked 94 flights totalling 45 hours of airtime via ADS-B across 2 callsigns. The most frequent segment is KX21 to KDED. Service window in our records spans 394 days. Of those flights, 2 (2.1%) carry at least one detected incident: a go-around, unstable approach, stall warning, or runway excursion. The Vought V-10 Vanguard has a maximum takeoff weight of 3,400 lb, light wake category.

About the Vought V-10 Vanguard

The Vought V-10 Vanguard represents a brief foray by the legendary military aircraft manufacturer into the general aviation market during the early 1960s. Best known for the F4U Corsair and A-7 Corsair II, Vought designed the V-10 as a four-seat, single-engine retractable-gear aircraft intended to compete with established models like the Beechcraft Bonanza and Piper Comanche. Powered by a Lycoming IO-540 engine producing 260 horsepower, the Vanguard featured all-metal construction and a distinctive low-wing configuration that reflected Vought's military design heritage.

Production was extremely limited, with only a handful of airframes completed before Vought abandoned the general aviation venture to focus on its core defense contracts. The type never achieved FAA certification under the standard airworthiness process, and most examples were certificated individually under experimental or restricted categories. This rarity makes the V-10 a curiosity among vintage aircraft enthusiasts today, representing one of the few attempts by a major military contractor to enter the civilian light aircraft market during the post-war boom.

The Vanguard's performance envelope was competitive for its era, with a cruise speed around 180 knots and useful load suitable for cross-country family travel. Its retractable landing gear and constant-speed propeller placed it in the complex single-engine category, though handling characteristics were reportedly conventional. The type's obscurity means few pilots have experience with it, and parts support relies entirely on owner fabrication or salvage from the tiny existing fleet.

SkyMeter has tracked flights across airframes and operators, with among the most active observed operators.

FLIGHTS
94
all time
FLOWN HOURS
45
tracked time
📍
AIRPORTS VISITED
22
unique
📡
CALLSIGNS
2
28 routes
📅
SERVICE PERIOD
06/18/2025 → 07/17/2026
first → last
INCIDENT RATE
2.1%
2 flagged

Top routes

By flight count

10
6
6
3
2
2
2
2
1
1
1

Flight numbers

Most-flown by this airframe

2

Aircraft specifications

Vought V-10 Vanguard

Engines
Single Piston
Vref (approach)
70 kt
MTOW
3,400 lb
Wake category
L

Recent flights

Newest 47 operations of N4098X

47
07/17/2026
38m
No alerts
06/25/2026
32m
No alerts
06/17/2026
26m
No alerts
06/17/2026
13m
No alerts
06/17/2026
25m
No alerts
05/22/2026
32m
No alerts
05/08/2026
16m
No alerts
05/08/2026
29m
No alerts
04/14/2026
50m
No alerts
04/14/2026
43m
No alerts
04/03/2026
35m
No alerts
03/26/2026
28m
No alerts
03/20/2026
23m
No alerts
03/20/2026
25m
No alerts
03/08/2026
28m
No alerts
02/18/2026
28m
No alerts
02/18/2026
22m
No alerts
02/11/2026
18m
No alerts
01/29/2026
34m
No alerts
01/29/2026
27m
No alerts
01/13/2026
46m
No alerts
01/13/2026
21m
No alerts
01/13/2026
42m
No alerts
12/23/2025
23m
No alerts
12/16/2025
17m
No alerts
12/16/2025
17m
No alerts
12/04/2025
27m
No alerts
12/04/2025
20m
No alerts
11/26/2025
30m
No alerts
11/26/2025
22m
No alerts
11/20/2025
5m
No alerts
11/20/2025
15m
No alerts
11/13/2025
37m
No alerts
11/13/2025
35m
No alerts
11/08/2025
26m
No alerts
11/01/2025
14m
No alerts
11/01/2025
25m
No alerts
10/18/2025
2h 13m
No alerts
10/18/2025
1h 6m
No alerts
10/13/2025
5m
No alerts
10/13/2025
14m
△ Low approach-stability score
10/01/2025
14m
No alerts
08/13/2025
18m
No alerts
08/13/2025
28m
No alerts
08/06/2025
27m
No alerts
06/18/2025
18m
No alerts
06/18/2025
19m
No alerts
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