1047756988.pptx

2. The Carburettor
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3. The Carburettor
ueJ is mostly supplied throug tl:!._e'l!_ainL nozzle ,
on the same level as fuel in the float ch
.
ambe,r.
Air is sucked through the Venturi by air pressure ,
as the piston goes O on an lnducti_
o
.o Stroke. .
his pressure reauct
FLOAT CHAMBER
RESERVOIR
t t
LOWERAIR PRESSURE
io!jlpulls fuel
f om the float chamber. into the main jet.
- ·---'_, -; ----'--'I
FUEL
LEVEL FLOAT

4. The Carburettor
As f e.l.leavesthe float chamber,
aii;._entersvia tilevent,,
the
.float drop§.,,openi9g_
a needl v!!,ly ,
which allows fuel to be rerilaced b Y
.the fuel pum
Iii•-.. ...
FLOAT CHAMBER
RESERVOIR
t t
LOWERAIR PRESSURE
.. . . .. ....... .. .......
-· ---' _, -; I---"--,{
FUEL
LEVEL FLOAT

5. The Throttle Valve
irhe throttle. valveconsists o
.r
,.,
a plate,
mountea in a central sp inale,
linked to the. throttle lever (or foot pedal) .
te c
irtie pla an be any:shape
that closelY
,fits ihetub7i n the carb urettor.
'
I '
I
l l
l l
I I
II
FLOAT
FLOAT CHAMBER
RESERVOIR
VALVE PLATE
LINK TO
THROTTLE
LEVER/PEDAL

6. The Throttle Valve
RESERVOIR
FLOAT
FLOAT CHAMBER

7. The Throttle Valve
RESERVOIR
I I
l l
l l
I I
FLOAT
FLOAT CHAMBER

8. BalancedAirPressure
FLOAT CHAMBER
RESERVOJR
AIR/FUEL
MIXTURE
FLOWSTO
ENGINE
FLOAT

9. ft .lf
r-w.--:y.
• j
.,.;.
W,
c
)
•
-. -.
FLOAT CHAMBER
RESERVOJR
Mixin AirandFuel
.
_-.,"l'.V'
-
!_" Jo.
•.
AIR/FUEL
MIXTURE
FLOWSTO
ENGINE
•
•
t
t
•
.
•
••
FLOAT

10. Mixin Airand Fuel
AIRINLET
-i-)
-
-
!ffDJ
· ;;...-====:; @)
MAINJET
6
J
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i
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r
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ffli@
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11. The Pressure Ca sule
ir at tiigb er altituaes is 'ttiinner',
causing lowe Rressure.
But the f.)iston travels the sar)le distance
whateve the. altitude it· s. working in.

12. The Pressure Ca sule
FLOAT CHAMBER
RESERVOIR
1ffl:
P
ii@i1
X•tk-
: N L
FLOAT

13. The Pressure Ca sule
1--lighenAtmosl)heric Pressure,
fflX=HDM!lldtti•li@l41-1=t8
by the outside.air r,ressure,
allowing the correct _
q
u aq
t
i
ty of fuel through,
FLOAT CHAMBER
RESERVOIR
for the weight of' air. r,assirJg into the erJgine.
FLOAT

14. The Pressure Ca sule
for the lower. weight.of air. assing iuto theengine.
FLOAT CHAMBER
RESERVOIR
FLOAT

15. Fuel ln'ectionS
fuel is mixea
In carl:iuretto s,
witti airib1 iore it e.nters ttieC,'..lina.ers,

16. Fuel 1n·ectionS
Air Inlet
fromairfilter

17. FuelInactionS
ump

18. Checkof Understandin
wtien
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19. Check of Understandin
lil) .
.. - ®
7
0 •

20. Checkof Understandin
at maximum efficie ncv.?
Mli@l q 1
1
§
;
m I •

21. Check of Understandin
-
IA

22. In the diagram below,
which arrow points to the main jet?

23. Check of Understandin
mi
-

24. , . .•.
I· / le'fj:;1t,;,-.,,
('·J_•
;- - - '.fi{
;,>· (
/ ':
(
"• ,-:
;:- - -n
,-a- flo_
a_
t_
c-ha-m
-be_
r_c_
a-
rb-
u-
re-t-to,
-
r- - - -
what is the function of the device
marked with a 'X'?
To atomize the fuel
To prevent the fuel/air ratio from
being too rich when the aircraft
climbs
To supply extra fuel for
acceleratio.n

25. Check of Understandin

26. Checkof Understandin
Wtiat