· ICAO24 4b4e99· last seen 2d ago

HB-2546 is a Schleicher ASW 29. SkyMeter has tracked 76 flights totalling 245 hours of airtime via ADS-B across 2 callsigns. The most frequent segment is LSZF to LSZH. Service window in our records spans 399 days. Of those flights, 2 (2.6%) carry at least one detected incident — go-around, unstable approach, stall warning, or runway excursion. The Schleicher ASW 29 has a maximum takeoff weight of 1,874 lb, light wake category.

About the Schleicher ASW 29

The Schleicher ASW 29 is a high-performance racing sailplane that represents the pinnacle of modern glider design for Open Class competition. Introduced in 2005 by the German manufacturer Alexander Schleicher GmbH & Co, the ASW 29 features an 18-meter wingspan (extendable to 20 meters with optional wingtip extensions) and advanced aerodynamics that deliver exceptional climb rates in thermals and outstanding cross-country speed. Its carbon fiber construction keeps empty weight around 570 pounds while maintaining structural strength for the demanding loads of competitive soaring.

The type quickly established itself as a dominant force in international gliding competitions, with pilots achieving multiple world records for speed over distance. The ASW 29 excels in weak lift conditions where its efficient wing design and low sink rate provide a decisive advantage, yet it remains fast enough in strong conditions to compete with pure racing machines. Maximum glide ratio exceeds 50:1 under optimal conditions, meaning the aircraft can travel more than 50 feet forward for every foot of altitude lost. The cockpit accommodates pilots up to 6'5" and features modern instrumentation including GPS-based flight computers and variometers that display real-time thermal strength.

Despite having no engine, the ASW 29 routinely achieves cross-country flights exceeding 500 miles by exploiting atmospheric lift from thermals, ridge lift, and wave systems. The never-exceed speed of 155 knots allows aggressive flying in strong conditions, while the clean stall speed of 43 knots provides a wide speed envelope for tactical racing. Water ballast tanks allow pilots to increase wing loading for faster cruise speeds on strong days, then dump the ballast for better climb performance as conditions weaken. SkyMeter has tracked flights across airframes and operators, with the largest observed operator.

FLIGHTS
76
all time
FLOWN HOURS
245
tracked time
📍
AIRPORTS VISITED
12
unique
📡
CALLSIGNS
2
15 routes
📅
SERVICE PERIOD
05/29/2025 → 07/02/2026
first → last
INCIDENT RATE
2.6%
2 flagged

Top routes

By flight count

6
6
2
2
1
1
1

Flight numbers

Most-flown by this airframe

2

Aircraft specifications

Schleicher ASW 29

Engines
0
Vref (approach)
55 kt
MTOW
1,874 lb
Wake category
L

Recent flights

Newest 46 operations of HB-2546

46
07/02/2026
2h 22m
No alerts
06/18/2026
5h 47m
No alerts
06/13/2026
2h 58m
△ Unstable
06/07/2026
2h 52m
No alerts
05/27/2026
6h 27m
No alerts
05/21/2026
5h 8m
No alerts
05/17/2026
3h 42m
No alerts
05/12/2026
4h 28m
No alerts
05/02/2026
5h 49m
No alerts
04/26/2026
1h 34m
No alerts
04/26/2026
13m
No alerts
04/26/2026
41m
No alerts
04/26/2026
6m
No alerts
04/26/2026
2h 17m
No alerts
04/26/2026
4h 24m
No alerts
04/24/2026
32m
No alerts
04/23/2026
2h 25m
No alerts
04/21/2026
56m
No alerts
04/21/2026
5m
No alerts
04/21/2026
9m
No alerts
04/21/2026
23m
No alerts
04/21/2026
2h 33m
No alerts
04/18/2026
1h 7m
No alerts
04/18/2026
1h 7m
No alerts
04/18/2026
26m
No alerts
04/18/2026
26m
No alerts
04/18/2026
2h 6m
No alerts
04/16/2026
3h 47m
No alerts
04/07/2026
1h 31m
No alerts
04/04/2026
2h 5m
No alerts
04/03/2026
5h 51m
No alerts
04/02/2026
5h 2m
No alerts
04/01/2026
3h 22m
No alerts
08/31/2025
43m
No alerts
08/17/2025
5h 44m
No alerts
08/16/2025
5h 19m
No alerts
08/15/2025
4h 33m
No alerts
08/11/2025
2h 56m
No alerts
08/07/2025
1h 43m
No alerts
07/31/2025
14m
No alerts
07/18/2025
2h 22m
No alerts
07/11/2025
4h 33m
No alerts
07/05/2025
5h 42m
No alerts
06/22/2025
3h 37m
No alerts
06/09/2025
5h 11m
No alerts
05/29/2025
3h 11m
No alerts
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