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20 Cards in this Set

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  • Back
What effect does positive G loading have on the blood?
What does Positive G cause?
Blood in the pilot's head tends to be forced downwards.
Causes: Grey Out, Blurred / Tunnel vision, Black Out, Unconsciousness.
What limits of positive G forces can humans stand?
Normally - 2.5G's
Anti-G Straining - 5-6G's
Angi-G Suit - 9G's
What is the Anti-G Straining manoeuvre?
Maintains arterial blood flow to the brain.
Isometrically strain muscles of upper stomach and legs. (Flowing to heart)
Isometrically strain muscles of upper thorax, chest neck and shoulders.
(Flowing to brain)
How does an Anti-G suit work?
Whenever G is applied to the aircraft a G-sensitive air valve opens and inflates the bladders firmly to squeeze the lower half of the body.
What is negative G and what can it cause?
Blood has difficulty flowing back to the heart. This leads to RED OUT. (where blood pools in the eyes under pressure causing glaucoma and blindness)
What are human tolerances to negative G's?
Half of Positive
Factors affecting G Tolerances:
Anti-G Straining,
Anti-G Suits,
Practice (Recency),
Lying Down,
Short and Stocky figure,
Weight Training (Anaerobic),
Being Female.
Factors decreasing G Tolerances:
Lack of Practice (Recency),
Poor Straining Technique,
Badly Fitting Anti-G Suit,
Illness, Dehydration,
Hangover, Drugs, Hypoxia,
Marathon Training (Aerobic),
Being Male,
Being Tall,
Low Blood Pressure,
Hyperventilation, Fatigue
What is Cellular Oxygen Reserve?
The brain and eyes have a reserve of oxygen of 3-4 seconds allowing the pilot to stay conscious.
Hazardous because no warning symptoms before Unconsciousness.
What is GiLOC?
When a pilot becomes unconscious due to G Forces.
What is Temporary Hearing Loss?
90-100db of noise for a short time. Hearing will return to normal over 12 hours.
What decibal are very loud noises and what do they cause?
90-100db of noise, instantly damages hearing with permanent hearing loss.
What decibal is noise induced hearing loss and what is it?
70-80db over a prolonged period (years) leading to permanent hearing loss.
What is the quality scale of headsets?
Grade 1 being worst, Grade 5 being best.
What happens if an audiogram of a pilot is not normal?
Further tests such as speech audiometry and an aircraft in-flight hearing test.
What is Temporal Distortion?
Adrenalin affects the body's nervous system and tends to significantly distort one's sense of time. High adrenaline levels slow time down.
Accident Situation Hazards are:
Smoke and Leaking Fuel,
Oil and Hydraulic Fluid,
Broken Power Wires,
Fallen Trees,
Precarious(unsafe) Aircraft Position,
Motor Vehicle Traffic
What is a Primary accident survey?
Looking for seriously injured people.
What is a secondary accident survey?
Head to foot check for other minor injuries.
What are the 5 Principles of survival?
Will To Survive