EASA Part-66 Exam Preparation Online

Hey George, this one's tricky, you've got the correction running the wrong way round. It's 179, because a plus one deviation means the compass is reading one degree low, so when the aircraft is genuinely pointing at 180 the card in front of you shows 179, and that lower number is what you steer to. Same idea as a watch that runs a minute slow, if you need to be somewhere at 8 o'clock you set off when the watch says 7:59, you work to what the dial shows and not what you wish it showed. The memory line for it is deviation east, compass least, and a compass correction card would read for 180 steer 179, so that's how I'd read it.

Lisa_T replied to GEO9816's question ·1h ago

Hello , i am thinking that the correct answer in this question is 181 degrees .If the deviation is +1 dergee that means that if the compas heading to 181 degrees the arcraft goes heading 180 degrees ( 181 degrees - (+1) degree = 180 degrees). On the other hand if the pilot steer to 179 degree the compass will show 180 degree but the plane would travel too 179 degrees . Is this right or am i wrong to somehtink? thank you for your time , George

GEO9816 asked a question ·2h ago

Actually, C is correct for the general case, since a low blade angle presents the least air load and lets the engine accelerate to idle with minimum starter effort. On the PT6 the propeller is a free-turbine layout decoupled from the starter, and on most reversing installations it rests on the fine-pitch start locks rather than in feather, so C still applies.

svenj88 replied to JayACA's question ·10d ago

The PT6 starts with the blades in feather?

JayACA asked a question ·10d ago

Hello. Indeed, moved to module 2.

PART66Online replied to Tj Anderson's question ·15d ago

why is this here (coming from CASA system) this is a buit random

Tj Anderson asked a question ·15d ago

A. High fidelity means low distortion, Class A is most linear, Class C is efficient for RF but distorts too much for clean audio.

Marek_AME replied to udreacc's question ·25d ago

Why else would the cockpit indicator run off it as a synchronous motor if the tacho was not making AC? The aircraft tachogenerator is a 3 phase permanent magnet unit, so the output is a sinusoidal AC voltage whose frequency tracks the rpm, that is why it is sinusoidal even though the stem never says AC. Linear only describes voltage against speed, not the waveform, so it does not apply here.

carlosmd replied to udreacc's question ·25d ago

Class C is specially designed for RF and only that and can't be used for audio

udreacc asked a question ·26d ago

in the question it is not mentioned it is referring to AC

udreacc asked a question ·26d ago