7/24/2019 Particularly Tricky Questions for ATPL

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1. f RPM lever of a constant sped propeller is moved forward duringa glide with idle power and whilst maintaining constant airspeed,the propeller pitch will:

- Decrease and the rate of descent will increase;Pushing RPM lever forward causes the propeller pitch to decrease

(ne pitch!. Decreasing the propeller pitch will move the chord ofthe "lade awa# from the direction of movement. $he propeller willcreate more drag. $he %&D ratio of the "lade will therefore decrease.$he rate of descent ' (Pr-Pa! & and with more drag, powerre)uired will increase and the rate of descent will increase

*. + propeller rotating clocwise as seen from the rear tends torotate the aircraft to the :

- %eft around the vertical ais and to the left around thelongitudinal ais

$he tor)ue reaction will turn the aircraft to the left around thelongitudinal ais. $he as#mmetric "lade eect or P-factor! willcauses the aircraft to #aw to the left.

/. 0ncreasing the num"er of propeller "lades decreases thepropeller ecienc# "ut increasing the maimum a"sorption ofpower.

2. +n aircraft with constant speed propeller increases its speed withconstant manifold pressure. $he propeller pitch will increase andthe propeller tor)ue will remain constant.

3. 4tatic sta"ilit# in roll due to sideslip will "e increased "# highwing, "ut decreased "# 5aps, low wing, vertical ns

6. $he advantages of alternating current on "oard are:

7lei"ilit# in use

%ighter weight of e)uipment

8as# to convert to direct current

8as# maintenance