Akaflieg Munchen Mü-4 München
Glider
Akaflieg Karlsruhe AK-5
AK-5
Wing span: 15m
Wing area: 10.66sq.m
Empty Weight: 278kg
Gross Weight: 485kg
Wing Load: 45kg/sq.m
Aspect ratio: 21.11
Airfoil: HQ-21/17.5
Structure: GFRP
MinSink: 0.58 m/s @ 85 kph
L/DMax: 39 @ 105 kph
No. of Seats: 1
No. Built: 1
AK-5b
Wing span: 15m
Wing area: 10.66sq.m
Empty Weight: 255kg
Gross Weight: 450kg
Wing Load: 42.2kg/sq.m
Aspect ratio: 21.11
Airfoil: HQ-21/17,5
Structure: Glass, Carbon and Aramid
MinSink: 0,58 m/s at 85 km/h
L/DMax: max 39 at 105 km/h
No. of Seats: 1
Akaflieg Karlsruhe AK-1
First flight: 1971
Engine: Hirth F10A/ 28 hp
Wing span: 15m
Wing area: 14.36sq.m
Empty Weight: 230kg
Gross Weight: 380kg
Wing Load: 26.5kg/sq.m
Vmin: 65 km/h
Structure: Metal
Airfoil: FX 61-1631
Aspect ratio: 15.7
MinSink: 0,68 m/s
L/DMax: 30
No. of Seats: 1
Akaflieg Darmstadt D-41
Wing span: 20m
Wing area: 14sq.m
Empty Weight: 360kg
Gross Weight: 750kg
Wing Load: 53.6kg/sq.m
Aspect ratio: 28.6
Airfoil: LS 6
Structure: GFRP
No. of Seats: 2
No. Built: 1
Akaflieg Darmstadt D-40
Wing span: 15m
Wing area: 11.5sq.m / 9.45sq.ft
Empty Weight: 275kg
Gross Weight: 380kg
Wing Load: 52kg/sq.m
Aspect ratio: 23.7
Structure: GFRP
No. of Seats: 1
No. Built: 1
Akaflieg Darmstadt D-39
This unique single-seat powered sailplane, created by the Darmstadt Akaflieg, looks exactly like a Standard Class high-performance sailplane except for its low-mounted wing. It features a retractable two-blade folding propeller, driven by twin Fichtel & Sachs modified KM 914V engines situated in the nose cone.
The D-39 is an adaptation of the basic D-38 airframe, having the same glassfibre/balsa sandwich construction with ailerons of glassfibre/Klegecel foam sandwich, and Schempp-Hirth airbrakes on the upper wing surfaces. No flaps are fitted. It is equipped with a manually-retractable sprung monowheel, and accommodation comprises a semi-reclining seat under a flush canopy, the rear section of which is detachable.
The D-39 first flew on 28 June 1979.
Engine: Limbach 68 PS
Wing span: 17.5m
Wing area: 13.4sq.m
Empty Weight: 438kg
Gross Weight: 563kg
Wing Load: 40kg/sq.m
Aspect ratio: 22.9
Airfoil: FX 61-184
Structure: GFRP
L/DMax: 37 @ 100 kph
MinSink: 0.70 m/s @ 87 kph
No. of Seats: 1
No. Built: 1
D-39
Engines: 2 x Fichtel & Sachs KM 914V, 35 kW (47 hp)
Wing span: 15.0 m / 49 ft 2 in
Length: 7.15 m / 23 ft 5.5 in
Height: 1.02 m / 3 ft 4.5 in
Wing area: 11.0 sq.m / 118.4 sq ft
Wing section: Wortmann FX-61 -184/60-126
Aspect ratio: 20.5
Empty weight: 280 kg / 617 lb
Max weight: 400 kg / 882 lb
Water ballast: None
Max wing loading: 36.3 kg/sq.m / 7.43 lb/sq ft
Max speed: 135 kt / 250 km/h
Stalling speed: 39 kt / 72 km/h
Min sinking speed: 1.0 m/sec / 3.3 ft/sec
Best glide ratio: 36 at 56.5 kt / 105 km/h
T-O run: 200 m / 656 ft
Rate of climb at S/L: 240 m/min / 787 ft/min
Range: 500 km / 269 nm
Akaflieg Darmstadt D-38
Designed by Wilhelm Dirks & Akaflieg Darmstadt
Wing span: 15m
Wing area: 11sq.m
Empty Weight: 210kg
Gross Weight: 360kg
Wing Load: 33kg/sq.m
Aspect ratio: 20.45
Airfoil: FX 61-184
Structure: GFRP
L/DMax: 36.5 @ 96 kph
MinSink: 0.66 m/s @ 83 kph
No. of Seats: 1
No. Built: 1
Akaflieg Darmstadt D-37 Artemis
Designed by Sator/ Dirks and Akaflieg Darmstadt.
Wing span: 18m
Wing area: 13sq.m
Empty Weight: 307kg
Gross Weight: 460kg
Wing Load: 35.38kg/sq.m
Aspect ratio: 24.92
Structure: GFRP
MinSink: 0.60 m/s @ 78 kph
L/DMax: 38 @ 85 kph
No. of Seats: 1
No. Built: 1
Akaflieg Darmstadt D-36 Circe
By 1961 members of the Akaflieg Darmstadt were investigating the possibilities of new materials such as reinforced glassfibre bonded resins and the D-36 Circe high performance single-seater, on which design work started in the spring of 1963, made extensive use of these. Designers included Lemke, Waibel, FrieB, Holighaus, & Schneider.
The monocoque fuselage is of balsa reinforced with glassfibre and epoxy resin, while the front section of the cockpit canopy is fixed and the rear part removable. The undercarriage consists of a large manually-retracted monowheel forward of the centre of gravity. The T-tail unit is of similar construction to the wings.
The first of two D-36s made its first flight in March 1964 and went on to win the German National championships that year. The D-36 also took second place in the 1965 World Championships at South Cerney. The wing torsion box shell is of balsa reinforced with glassfibre and epoxy resin; camber changing flaps and Schempp-Hirth air brakes are featured, although the second prototype differed from the first only in having these air brakes removed and replaced by a tail braking parachute.
The D-36 Circe was developed into the Schleicher AS-W 12 for advanced competition and long-distance flying.
D-36 Circe
Span: 58 ft 3.5 in / 17.8m
Length: 24 ft 0.5 in / 7.35 m
Height: 4 ft 11 in
Wing area: 137.8 sq.ft / 12.8 sq.m
Aspect ratio: 24.75
Wing section: Wortmann FX-62-K-131/60-126
Empty weight: 622 lb / 285 kg
Max weight: 904 lb 401 kg
Water ballast: None
Wing Load: 31.33 kg/sq.m / 6.55 lb/sq ft
Max rough air speed: 108 kt / 200 km/h
Stalling speed: 36 kt / 67 km/h
Min sinking speed: 1.83 ft/sec at 52 mph / 0.53 m/s @ 82 kph
Best glide ratio: 44:1 at 58 mph / 87 kph
No. of Seats: 1
No. Built: 2
Akaflieg Darmstadt D-34
After the war came the D-34a high performance single-seater, which first flew in 1955, followed by the improved D-34b, which first flew in the autumn of 1956, the D-34c, first flown in the spring of 1958, and the D-34d, which made its first flight in March 1961.
Wing span: 12.65m
Wing area: 8sq.m
Empty Weight: 145kg
Gross Weight: 250kg
Wing Load: 31.25kg/sq.m
Airfoil: NACA 644-621
Aspect ratio: 20
L/DMax: 28 @ 80kph
MinSink: 0.85 m/s @ 75kph
No. of Seats: 1
No. Built: 1
