What RPM should not be exceeded in the first 5min after start?
1200rpm
Reving to 1500rpm will damage engine…
Don’t do Run-Up either…
What does a fast-spining propeller cause on ground?
A low pressure area at tip and 6 o’clock,
Avoid areas of Rocks, Dirt, Water when power up. Hence, I should move a/c to more suitable sport prior to engine start.
True or False Don’t start aircraft propeller when over Pools of water?
True, small water dropplets are as destructive as Rocks!
What is the main problem with using Carb Heat on the ground?
If over Sand, dust, Dirt, or Snow, the engine is ingesting ‘unfiltered air’ inducing FOD inside cylinders.
Only over clean Grass or spotless Cement!
Why I don’t help someone who cannot start his engine…
This becomes a self-propping Nightmare!
Possible Death, stay-away!
Hand Propping Rules
Get a ‘demo’ from an Expert…
Remove loose items of clothing & Rings
Tie the Taildown
Park Brakes Set
Put a Single Chalk on a rope,
…later you’ll pull on that rope
Throttle set to 1/4 of an inch, never more
Put Fuel Selector OFF
(as I have ~30sec to get it back on)
Mix Rich, Mags On, Primer
Ground I stand on is free of Ice+Snow
When I am facing prop…
Left foot forward
Step back as Pull down with weight transfer to rear foot, by pushing off with Left foot.
Pull down on left-side using fingertips never beyond the 1st joint, 2/3 way to Tip!
Final vector away from prop (backwards)
Walk ‘around’ prop to go put Fuel selector back on, Set 1000Rpm
Pre-shutdown P-lead test should be done at 700rpm or so, How?
Mags both momentarily off
To ensure mag not live when engine is off
Two Person Hand propping? Someone trustworthy…a pilot…
Familiarize them with Brakes, Throttle, Mixture, Primer and Mags switches.
Yell ‘Mags on’
Bring left side of Propeller downwards when facing aircraft.
True/False never grip with 2nd joint on fingers to hand prop?
True
If you ever need to ‘reposition’ a Prop…
Just assume the mags are hot and it will fire! So keep your body out of the way!
How close to the Prop do you stand if hand propping?
Close enough to eliminate an off-balance condition from occuring when the blade is swung downwards.
What do you look for as the ideal run-up area?
Into wind, free of debris, rocks, sand.
Clear area for propwash behind
What should you consider when faced ‘into wind’ for Run-up…
-Surface condition ‘under’ my Propeller.
-Move forward a little so tailwheel is not cocked (to remove any stress on it).
-Stick full aft
How to clean fouled spark plugs?
-With Run-up power of 1800rpm, lean mixture until engine runs rough (very lean), then hold that for 10secs.
-Enrich and re-do Mag check
What is proper Sequence of Mag check?
Both, Left off, Both, Right off, Both
Failed mag check means return to Hangar
How to check flight controls?
Asses in brain what I should see, before I look!
Up/down
Left Right
+Rudder (right side window)
Then all 4 corners (to ensure no binding)
Draw a Box (to get Pax legs out of the way)
How to adjust mixture on roll for takeoff at high DA?
Do so when above 4000’DA, not lower, as your losing some cooling by doing this!
-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…just fine-tune at >800’ on climbout.
Does adjusting mixture during run-up at High DA help?
No, because 1800rpm is partial power, the wrong address for what your doing.
When you apply carb heat does the Mixture become richer or leaner?
Richer, because warm air is ‘less’ dense
Four ways to cool an engine?
-Increase IAS
-Enrich Mixture (Full) so got exess fuel…
-Lower throttle/MP…a lot
-Find Cooler air
What does Mixture control do? (Red knob)
Adjusts/meters the amount of fuel that passes through the main jet in the Carburetor
Which gives more power? ROP or LOP
ROP but uses 20% more fuel for 10% more speed
What is considered to be High-speed cruise?
65% HP, assuming that formula is accurate in Dynon, which it’s likely NOT!
What can cause detonation? (3)
Over leaning
Excessive CHT
Abrupt throttle opening
