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Bearhawk Patrol > Engine > Flashcards

Engine Flashcards

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1
Q

What RPM should not be exceeded for 5min after start?

A

1200rpm
Revving to 1500rpm will damage engine…

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2
Q

What does the spining propeller cause on ground?
Therefore, I should move aircraft prior to starting engine or taxiing.

A

A low pressure area at tip and 6 o’clock position
Avoid areas of Rocks, Dirt, Water when power up

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3
Q

Don’t start aircraft propeller when over?

A

Pools of water
Small water dropplets are as destructive as Rocks!

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4
Q

What is the main problem with using Carb Heat on the ground?

A

If over Sand, dust or Dirty terrain, the engine is ingesting ‘unfiltered air’ causing FOD inside cylinders…

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5
Q

Why I don’t help someone who cannot start his engine…

A

This becomes a self-propping Nightmare!
Possible Death

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6
Q

Hand Propping Rules

A

Remove loose items of clothing and Rings
Tie the Taildown
Park Brakes Set
Also use a Single aluminium Chalk on a rope,
…you pull on the rope, far away
Throttle set to 1/3 of an inch, never more
Put Fuel Selector OFF (I have ~30sec to get it back on)
Mags On, maybe Primer
The Ground I am standing on is free of Ice+Snow
Pull down on left-side
Final vector away from prop (backwards)
Walk around prop to go put Fuel selector back on, Set 1000Rpm

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7
Q

Hand Propping Technique

A

Left side
Left foot forward
Step back as pull down (weight transfer to the rear foot) by pushing off with left foot.
Use your Fingertips, never beyond 1st joint

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8
Q

Pre-shutdown P-lead test/ignition switch test should be done at 700rpm or so, How?

A

Mags both momentarily off
To ensure mag not live when engine is off

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9
Q

Two Person Hand propping?

A

Familiarize them with Brakes, Throttle, Primer and Mags
Yell ‘Mags on’
Bring left side of Propeller downwards when facing aircraft.

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10
Q

True/False never use 2nd knuckle to hand prop?

A

True

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11
Q

Where do you position fingers with reference to Spinner and Tip?

A

About 2/3 of the way to the Tip

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12
Q

If you ever need to reposition a Prop…

A

Assume the mags are hot and it will fire!

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13
Q

How close to the Prop do you stand if hand propping?

A

Close enough to eliminate an off-balance condition from occuring when the blade is swung.

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14
Q

What do you look for as the ideal run-up area?

A

Into wind, free of debris, rocks, sand.

Clear area for prop wash

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15
Q

What should you consider when faced into wind for Run-up

A

Move forward a little so tailwheel is not cocked (to remove any stress on it)
Stick full aft
Surface condition ‘under’ my Propeller.

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16
Q

Prior to Run-up, checklist reminder…

A

Stick Full Aft, then power up

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17
Q

How to clear spark plugs? Trying to use heat to clean spark plug…

A

With Run-up power, lean mixture until engine runs rough (very lean), then hold that for 10secs.
Enrich and re-do Mag check

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18
Q

What is proper Sequence of Mag check?

A

Both, Left off, Both, Right off
Failed mag check means return to Hangar

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19
Q

Check flight controls?

A

Asses in brain what I should see, before I look!
Stick
Up/down
Left Right

Rudder
Then all 4 corners (to ensure no binding)
Draw a Box (Pax legs out of the way)

20
Q

How to adjust mixture on roll for takeoff at high DA?

A

Full power, then mixture out until rough and ease it back in a little…
Ok if engine momentarily stops, just ease it back in…
Don’t look inside at RPM or EGT…fine-tune at 800’ on climbout.

21
Q

Does adjusting mixture during run-up at High DA help?

A

No, because 1800rpm is partial power, the wrong address for what your doing.

22
Q

When you apply carb heat does the Mixture become richer or leaner?

A

Richer, because warm air is less dense

23
Q

Three ways to cool an engine?

A

Increase IAS
Enrich Mixture
Lower throttle…a lot!
Note: Max throttle Setting enables enriched cooling.

24
Q

what does Mixture control do? (Red knob)

A

Adjusts/meters the amount of fuel that passes through the main jet in the Carburetor

25
Q

Which gives more power? ROP or LOP

A

ROP but uses a lot more fuel, but runs cooler also…

26
Q

What is considered to be High-speed cruise?

A

65% HP

27
Q

What can cause detonation (3)

A

Over leaning
Excessive CHT
Abrupt throttle opening

28
Q

After shutdow with hot engine, will still have fuel in cylinders…what precaution must you take?

A

Never touch the propeller, even if Mags are Off, engine can Kick over a few Revolutions if propeller is moved enough to create compression…

29
Q

How to lean mixture for Takeoff above 3000 DA?

A

Advance to Full throttle over 3 secs, then lean until it coughs, then enrich…time to lift tail as check T&P’s

30
Q

What is most important wind level to consider in Mountain ops?

A

10,000’ winds <15kts
Better if less than 10kts…
Venturi & Funneling effects will triple these forecast values!

31
Q

Two ways to eliminate Convective Turbulence?

A

Be done flying by 10:30am or fly above Convective cloud tops

32
Q

What consideration when approaching mountains from downwind side and I begin to experience eddies & turbulence?

A

It will only get worse…your done…Rtb…

33
Q

Cruise Descent settings

A

Carb heat Hot, at least 15”MP, leave RPM
Left hand First when reduce power!
…15” is to reduce thermal shock…

34
Q

Three ways Dynamic counterweights on crankshaft get detuned?

A

1.Rapid Throttle ops (Simul eng fail, do so slowly)
2.High RPM with LOW MP descents (loud)
3.Carb ice

35
Q

Three types of Carb ice?

A

Fuel Ice: due evaporation
Impact Ice on air Filter
Throttle ice: progressive decline in power due to expansion ice around Butterfly Valve

36
Q

Is Carb heat anti-ice or De-ice?

A

Anti-ice, must be on before ice forms, it will not always clear ice that has already formed!

37
Q

Which throttles settings are most dangerous for Carb icing?

A

Partial Power settings, at cruise power setting generally enough heat to melt ice.

38
Q

What is last resort if got carb ice?

A

Cause a backfire by turning mags off momentarily… This causes damage to engine, but may dislodge the ice…

39
Q

Should Carb Heat be turned on prior or after throttle reduction?

A

Always prior, to warm the carb intake a little ahead of time…

40
Q

What should you do with mixture when you need to cruise with Carb Heat on?

A

Lean a bit, as warm air your now using from exhaust baffling is less dense.

41
Q

True or False…never use partial Carb heat unless you have a Carb Temp gauge?

A

True

42
Q

Descent point ROT?

A

3 x Alt in1k = descent point
so, 2000’agl is 2x3 = 6miles

43
Q

Descent ROD?

A

Groundspeed/2 (3deg)
vs.
Power off Glide 6deg angle
1000’ you can glide 1.5nm
1000’ on ils has 3nm to go!
B777 glide’s better than BH

44
Q

Less weight will improve Glide distance by?

A

Up to 20% further

45
Q

What does lower compression do?

A

Lowers Temperatures (as Air cooling is deficient from the start)
Allows 80 octane fuel (older fuel)
Keep Cylinder Jugs under 400deg F (CHT)
Tips of Props break sound barrier above 2700rpm, which is very inefficient.
Higher compression increases risk of detonation
[Premium gas in high compression engines of sports cars, to get less lead, less chance of detonation. The higher the Octane number, the more compression the fuel can withstand prior to detonation]

Bearhawk Patrol (13 decks)

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