PERFORMANCE
RSUK0287_POH_Cavalon Revision 2, Issue Date 24.06.2015 5-3
5.4 Speeds
The following speeds are relevant for flight performance. For additional speed limitations
refer to SECTION 2 LIMITATIONS of this manual.
Mini horizontal speed (Vmin), TOP (Rotax 914)*, 500Kg...48 km/h (30mph) IAS
Vmin, TOP (Rotax 914)* 560KgTOW ................................61 km/h (38mph) IAS
Vmin, TOP (Rotax 914)* 560Kg, IVO prop ........................56 km/h (35mph) IAS
Minimum horizontal speed, (Vmin) TOP (Rotax 912) ........56 km/h (35mph) IAS
Speed for best angle of climb V
X
.....................................100 km/h (60mph) IAS
Speed for best rate of climb or maximum endurance V
Y
..102 km/h (70mph) IAS
Best range speed.............................................................110 km/h (70mph)IAS
Long range speed** ........................................................ 120 km/h (75mph) IAS
Approach speed***.......................................................... 100 km/h (60mph) IAS
Vmc power-off**** .............................................................32 km/h (20mph) IAS
Vmc power on**** ...............................................................0 km/h (00mph) IAS
* Take care! A full power operation at Vmin with a Rotax 914UL will result In a
very high nose-up attitude with little forward visibility.
** Long range speed is the speed faster than the best range speed which
results in a slightly lesser range but represents a good compromise between
range and saved air time.
*** Approach speed above 60mph builds energy in the rotor that results in a
long floating landing. Approach speed at 50mph results in a very short
landing roll, and below 50mph requires increasing skill especially at
maxTOW.
****Vmc is the minimum controllability speed. At 20mph or below, engine off,
rudder authority reduces, to negligible below 10mph.
5.5 Rate of Climb
Rate of climb, 500 kg, V
Y
, TOP, 914UL ................................... 3.8 m/s (750fpm)
Rate of climb, 560 kg, V
Y
, TOP, 914UL ................................... 2.8 m/s (550fpm)
Rate of climb, 500 kg, V
Y
, TOP, 912ULS................................. 2.5 m/s (500fpm)
5.6 Take-off and Landing Data
Take-offs and landings have been demonstrated up to a crosswind component of 36 km/h
(22mph).
The following data is valid for operation at a gross mass of 500 kg and 560Kg where shown
at an even air strip with short grass, no wind, and pre-rotation to 220 RPM (or 200rrpm for
560Kg pre rotation). Take-off and landing distances account for a 15m obstacle.
Wet grass or boggy conditions will significantly increase this.
Take-off roll* .................................................................................... 80 – 200 m
Take-off distance, 914UL to clear a 15m obstacle.................................... 405 m
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