Airplane Factory SLING LSA
Pilot Operating Handbook
Page | 4-15
Date of Issue: 07 July 2014
Revision : 1.3
4.9
Cruise
Refer to section 5 for recommended cruising figures.
4.10
Descend
Optimum glide speed
- 72 KIAS.
WARNING
The fuel lift pipe in each fuel tank is situated adjacent to the lower inside
wall of the tank. The aircraft should at no time be subjected to a
sustained side slip towards a near empty fuel tank (i.e. - wing with near
empty tank down) as, despite the baffling, this may have the
consequence that the fuel runs towards the outer edge of the tank
exposing the fuel lift pipe (to suck air), thereby starving the engine of fuel
leading to engine stoppage. This poses a particular threat when at low
altitude, typically prior to landing.
WARNING
If a fuel lift pipe is exposed to air, the pump will suck air into the engine
(from the empty tank) and engine failure will result. When one tank is
empty, or close to empty, the fuel selector valve should be switched to the
fullest tank.
Avoid operation below the normal operational oil temperature (90 to
110 °C / 194 to 230 °F).
CAUTION
It is not advisable to reduce the engine throttle control lever to minimum
on final approach or when descending from very high altitude. In such
cases the engine can become over-cooled, although unlikely, and a loss
of power may occur. Descent at increased idle (approximately 3000 rpm),
speed between 65 to 85 KIAS and verify that the engine instruments
indicate values within permitted limits.
