Pipistrel Apis-Bee

The Pipistrel Apis-Bee, also called the Apis/Bee, (Apis means Bee in Latin) is a Slovenian mid-wing, single-seat glider and motor glider, that was designed and produced by Pipistrel.[1]

Apis-Bee
Role Motor glider
National origin Slovenia
Manufacturer Pipistrel
Status Production completed (2018)
Unit cost
€53,600 (2011)
Developed from Pipistrel Apis

By October 2018 it was listed as a "legacy" product and production had ended.[2]

Design and development

The Apis-Bee is a second generation derivation of the original Pipistrel Apis design. The company explains the name of this version, "In some countries, the name "Apis" is trademarked, so we are unable to use it. These countries are, as far as we know, the following: Germany, Austria, Switzerland and some Scandinavian countries. There, the aircraft is marketed as "Bee". We chose this because "Apis" in Latin means a bee."[1][3]

The aircraft is made from composites, predominately carbon fibre and fibreglass with some portions in sandwich configuration and some as shells. The tailplane is a T-tail configuration. The wing is the same as the wing used on the Pipistrel Sinus and Taurus. Its 14.97 m (49.1 ft) span wing employs a 17.01% IMD 029 airfoil, has an area of 12.24 m2 (131.8 sq ft), an aspect ratio of 18.33 and mounts flaperons as well as Schempp-Hirth style airbrakes. The powered version has a pylon-mounted, retractable Hirth F33 BS two-stroke single cylinder engine.[1][4]

The Apis-Bee differs from the early Apis by the incorporation of 133 improvements, including: retractable landing gear, steerable tailwheel, ballistic parachute, enlarged cockpit, new lighter Hirth F33BS engine that can be removed quickly and has faster engine extension and retraction, a redesigned propeller, lower vibration levels and better cooling, standard wing-mounted 20 litres (4.4 imp gal; 5.3 US gal) fuel tank replacing the former 8 litres (1.8 imp gal; 2.1 US gal) tank, new instrument panel, cockpit control ergonomics, the engine management system from the Taurus, re-balanced and lighter flight control feel, optional 5.00 x 5 main wheel, leather interior, solar panels to run the on-board electrical system, improved cockpit ventilation and canopy defog and a new firewall between the cockpit and the engine compartment.[3]

Operational history

The Apis-Bee holds many Fédération Aéronautique Internationale world records in the under 300 kg (661 lb) class:[1][3]

  • Free out and return distance: 310 km (192.6 mi), Tanja Pristavec, DU feminine
  • Free distance using up to 3 turn points: 347.6 km (216.0 mi), Tanja Pristavec, DU feminine
  • Free distance: 154 km (95.7 mi), (Tanja Pristavec, DU feminine)
  • Free distance using up to 3 turn points: 808.9 km (502.6 mi), Boštjan Pristavec
  • Speed over a triangular course of 100 km (62.1 mi): 76.9 km/h (47.8 mph), Tanja Pristavec, DU feminine
  • Out-and-return distance: 501 km (311.3 mi), Andrej Kolar, DU general
  • Speed over an out-and-return course of 500 km (310.7 mi): 82.1 km/h (51.0 mph), Andrej Kolar, DU general
  • Free Three Turn Points Distance: 619.7 km (385.1 mi), Andrej Kolar, DU general
  • Free out-and-return distance: 511.6 km (317.9 mi), Andrej Kolar, DU general
  • Speed record over a triangular course: 118.2 km/h (73.4 mph), Boštjan Pristavec

Specifications (Apis-Bee motorglider)

Data from World Directory of Leisure Aviation 2011-12 and manufacturer[1][4]

General characteristics

  • Crew: one
  • Length: 6.26 m (20 ft 6 in)
  • Wingspan: 14.97 m (49 ft 1 in)
  • Height: 1.3 m (4 ft 3 in)
  • Wing area: 12.24 m2 (131.8 sq ft)
  • Aspect ratio: 18.33:1
  • Airfoil: 17.01% IMD 029
  • Empty weight: 222 kg (489 lb)
  • Gross weight: 322.5 kg (711 lb)
  • Fuel capacity: 20 litres (4.4 imp gal; 5.3 US gal)
  • Powerplant: 1 × Hirth F33 BS single cylinder, two-stroke aircraft engine, 21 kW (28 hp)
  • Propellers: 2-bladed wood with fibreglass reinforcement

Performance

  • Stall speed: 58 km/h (36 mph, 31 kn)
  • Never exceed speed: 220 km/h (140 mph, 120 kn)
  • g limits: +5.3/-2.65
  • Maximum glide ratio: 40:1 at 94 km/h (58 mph)
  • Rate of climb: 3.3 m/s (650 ft/min)
  • Rate of sink: 0.59 m/s (116 ft/min)
  • Wing loading: 26.3 kg/m2 (5.4 lb/sq ft)
gollark: Which sound very fancy, although I have no idea how they work.
gollark: On a Discord server for another modern note-taking thing I'm on someone was talking about "n-grams" and "latent dirichlet allocation".
gollark: There are also, if NLP were not so bee, *many* useful approaches I could take to categorize things efficiently.
gollark: I'm likely to implement (eventually) fuzzy page name matching where it tells you stuff *like* what you spelt. Right now the search just looks for pages containing the same word (give or take endings, SQLite uses some "porter stemming" algorithm).
gollark: > "nice editor" sounds good. for instanceI mostly just mean that it will, for instance, keep your current indentation/list level if you add a newline. I can't think of much other useful stuff, markdown is simple enough.> it'd be cool to have a way to embed links to other notes a way that's as easy as adding a tenor gif to a discord messageYou can, it's just `[[link text:note name]]` or `[[note name]]` if they're both the same. "Nice editor" may include something which shows fuzzy matches > sematic taggingI thought about tagging but realized that "bidirectional links" were *basically* the same thing; if you put `[[bees]]` into a document, then the `Bees` page has a link back to it.

See also

References
  1. Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 136. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  2. "Pipistrel Aircraft Apis/Bee - Pipistrel". www.pipistrel.si. Archived from the original on 21 June 2018. Retrieved 15 October 2018.
  3. Pipistrel (2011). "What is new with the new generation Apis/Bee?". Archived from the original on 20 December 2012. Retrieved 2 December 2012.
  4. Pipistrel (2011). "Apis/Bee technical data". Archived from the original on 20 December 2012. Retrieved 2 December 2012.
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