Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
www.pipistrel.eu<br />
Cruise<br />
<strong>ALPHA</strong> <strong>Trainer</strong> 5-5<br />
Performance REV. 0<br />
Aircraft at MTOM, recommended cruise power of 5300 RPM in ISA and sea level altitude,<br />
flaps retracted:<br />
<strong>ALPHA</strong> <strong>Trainer</strong><br />
cruise airspeed<br />
<strong>ALPHA</strong> <strong>Trainer</strong><br />
108 kts (200 km/h)<br />
Best economy cruising level or the <strong>ALPHA</strong> <strong>Trainer</strong> is 6000 ft. There, cruise performance is equivalent<br />
or better than above due to IAS-TAS relation, but fuel consumption is lower.<br />
At these parameters the fuel burn is 3.6 USgal (13.6 l) per hour. For detailed fuel consumption determination<br />
for various cruising regimes consult the Rotax 912/S Operators manual.<br />
Effect of outside temperature<br />
Every 10 degrees Celsius of OAT increase versus the ISA, the cruising speed at 5300 RPM decreases<br />
by 3 kts.<br />
Descent<br />
Reference sink rate, with flaps set to 2 nd position measures 440 fpm (2.2 m/h) at 50 kts (92 km/h),<br />
power idle.<br />
<strong>ALPHA</strong> <strong>Trainer</strong><br />
<strong>ALPHA</strong> <strong>Trainer</strong><br />
sink rate at 50 kts (92 km/h) full flaps 440 fpm (2.2 m/s )<br />
The glide<br />
The glide is defined as unpowered wings-level flight at speed providing best lift over drag ratio<br />
or minimum sink rate.<br />
Should the engine become inoperative in flight, as a result of either intended or unintended actions,<br />
and it cannot be restarted, react as follows:<br />
establish wings-level flight at the speed providing best lift over drag ratio, if you desire to glide<br />
the greatest distance from a given altitude.<br />
establish wings-level flight at speed providing minimum sink rate, if you desire do stay airborne<br />
the longest. This may come in handy in case you will be forced to give way to other aircraft or if you<br />
simply need time to determine the most appropriate site to land out on.<br />
<strong>ALPHA</strong> <strong>Trainer</strong><br />
<strong>ALPHA</strong> <strong>Trainer</strong><br />
minimum sink speed<br />
58 kts (108 km/h)<br />
minimum sink rate, flaps +15 deg<br />
460 fpm (2.3 m/s)<br />
best lift/drag ratio speed<br />
64 kts (118 km/h)<br />
best lift over drag ratio , flaps +15 deg 17:1<br />
CAUTION: If the engine fails, especially in climb, the aircraft always loses some 30 meters (100<br />
feet) of altitude before reaching best glide speed in wings-level unpowered flight.
Change language