Module 11. Aeroplane aerodynamics, structures and systems
A diode connected across a coil will • prevent the coil being fitted the wrong way. • prevent back EMF and allow faster switching. • suppress arcing when relay is opening and closing.
Storklubba asking: • I think "prevent back EMF and allow faster switching" is the correct answer
Module 11. Aeroplane aerodynamics, structures and systems
A battery in situ on an aircraft • charges at a fairly constant rate because generator voltage remains constant. • may charged at an excessive rate if initial battery voltage is low. • may charge slowly if initial battery voltage is low.
Operation with the engine at maximum boost should be limited to • prop at fine to prevent overstressing the engine. • prop at course to prevent overstressing the engine. • prop at windmill to prevent overstressing the engine.
Storklubba asking: • While the question and answer is not wrong, the wording seems ambigious. "Maximum boost" is not a very technical term, and a simple (overspeed) clarification behind overstressing would be good. When i read this question i think that maximum boost means maximum power, and with the propeller at coarse you would be extracting more power from the engine therefore possibly "overstressing" it. I offcourse understand the answer they are looking for is coursing off the blade to not overspeed the engine and prop at high power. Am i missing something?
The limits for a tracking check are • 1/4 inch maximum difference between adjacent blades. • 1/8 inch maximum difference between opposite blades. • 1/8 inch maximum difference between all blades.