Performance



Sportavia RF5B Sperber
Taking off from KAWO, photo by Dave McConeghey



Pilots desiring a long life are keenly aware that book performance is never the same as actual performance of individual aircraft.
The only official values will be in your own aircraft's POH.

Yet, for the purposes of exaggerated truths characteristic of 'hangar talk' or the bragging that accompanies alcohol:


PERFORMANCE DATA

Span 55'10"
Length 25'4"
Height 6'5"
Wing Area 19.0m²
Wing Section NACA 23015/23012
Aspect Ratio 015.25
Empty Weight 1176 lbs
Max Weight 1500 lbs
Load Factors Not published
Est. L/D--fixed pitch prop 26:1
Est. L/D--prop feathered 28:1
Max recommended cross wind 10 mph
Stall - Clean 42 mph
Stall - spoiler extended 45 mph
Minimum Sinking Speed 52 mph
Minimum Sink 1 Person 175 fpm
Minimum Sink 2 Persons 198 fpm
Best L/D Speed 63 mph
Max Gear Operating Speed 81 mph
Max. Rough Air Speed 103 mph
Never Exceed Speed 140 mph
Max Gear/Spoiler Extended Speed 140 mph
Max. Rate of Climb 500 fpm
Typical fuel consumption 3 gph
Range (with reserves) 250 mi

As always, performance on any day is affected by density altitude, aircraft weight, and simple measurement error.