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The new "Piuma Evolution" is different from the Original Piuma in the following modifications:
- Fuselage shape: the cockpit is 1 inch more wide. The rear side is completely tapered and the lower side is rounded for better attractiveness and aerodynamic.
- Wing shape: the chord at root is 43,3 inches (the original is 47,2 inches) and the aspect ratio is 13/1 (original 11,2/1). Dihedral is 2° instead of 3° and the wing profile changes from 16% into 15%. Max thickness.
- Tail shape: the tail and fin area now are more little and slimmer; the tail is cantilever, with 2 little strut drops. The 8 steel cables used in the Original Piuma were removed.
- Wing struts: now the wing struts are more little and they are in aluminium-alloy drops.
- Engine: the engine is partially hideden by the wings in the Original Piuma; now it is in the full air and it is possible to use the engine at the full power for more time.
- Front wheel: now it is electrically retrectable; it is also possible to build it fixed and with fairing, steering too.
- Landing gear: the stratified wood landing gear covered with epoxy glass (or epoxy carbon fiber) is much more aerodynamic.
- Seat: it is shaped for a more outstretched position, right for a glider. It is more confortable and also suitable for 6 feet tall persons (or little more).
- Instrument panel: it is more similar to a glider panel.
- Tail trim: it is electrical; the construcion is clearly drawn in the plans.
- Aerodynamic brakes: the controls and the little squares have been improved and drawn in 1 to 1 scale.
The best efficiency now is 20 and the normal cruise is about 63 MPH at 80% power with a 25HP engine.
The estimated building time is 1000 hours, the same of the Original Piuma.
Wing span
Total wing area
Aspect ratio
Dihedral
Total tailplane area
Tail arm
Length overall
Max height
Empty weight
Max take-off weight
Max wing loading
Recommended load factors (security coeff. 2)
Ultimate load factors
Max level speed
Normal cruising speed
Stalling speed
Never exceed speed
Best glide ratio (at 43 MPH)
Take-off
Landing
Max climb rate at sea level
Min sink rate (at 39 MPH)
Engine |
38,7 ft
114 sq.ft
13
2°
15 sq.ft
10,8 ft
19,7 ft
5,3 ft
330 lb
530 lb
4,6 lb/sq.ft
+ 3.5 - 1.9
+ 7 - 3.8
72 MPH
62 MPH
35 MPH
84 MPH
20
330 ft
330 ft
460 ft/min
165 ft/min
25 HP
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The Piuma Evolution construction plans are composed of 15 drawings with references in italian and english and a handbook in italian language (35 pages) or english (25 pages). These books contain a lot of photos and little drawings and the all materials note.
Also the tail boom is available: diameter mm 127 - thickness mm 1,5 - lenght m 5,2.
The material cost, without engine and instruments, is about 4000 euro, at the 2002 prices.
The time of construction is about 1000 hours.
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