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Winter Seminar

1. Need
For both renters and owners

Safety - what are the threats? Identify at least 20
Costs - Starters, batteries, camshafts,
Reliability

2. Equipment - is designed to operate for 15 Celsius only

3. Heat flows
Hot to cold
Convection, conduction, radiation

4. Airframe
Snow blowing into openings
Snow in controls causes imbalance and may cause flutter
Cessnas with control locks in place and snow loads on tail
Drain holes
Battery - take home
Avionics - remove for long periods of inactivity
Preheat cabin so that gyros are warm
Tires and oleos will have lower pressures in them
Remove snow carefully
Ice in hinges must be melted - not crunched out using control movement
Frost formation
Control cables are slacker in winter

5. Engine
Preheat engine for at least 45 minutes, with covers on
Plug engine heaters in early. Make sure heater works
Oil has a low Specific heat - it doesn't heat very effectively
Co-ordinate early departures with dispatch
Remove covers as last item in preflight - start engine within 5 minutes
Lycoming - H2AD engines must be preheated thoroughly
Prime engine. Wait a few seconds for fuel to vaporize before cranking engine
Don't pump throttle on C-152 while cranking - no accelerator pump
Start engine with alternator Field off to conserve battery
If engine misfires on start-up, plugs may become frozen. Put airplane in warm hangar
Propeller is a heat sink. Cover blades for maximum warming of crankshaft bearings
Do not add power until oil temp gage is off the peg
Use carb heat during the warm-up period to allow fuel to vaporize properly. Lean mixture. Carb heat is unfiltered air.
Don't do run-up over ice or snow or gravel. Propeller is damaged.
Make sure winter kit is installed.
Frozen water cannot be drained from the fuel strainers
Avoid power-off descends.
Make slow adjustments to the power - 5 second rule

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Frank Hofmann
Copyright © 2003