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Matthias Nott
2026-03-22 c7fe4faf1aab7bd121763380c10be86d95a80333 
 SPL Exam Questions EN/30 - Flight Performance and Planning.md
....@@ -46,9 +46,7 @@
4646 
4747 #### Key Terms
4848 
49
-- **D** — Drag
5049 D — Drag
51
-
5250 ### Q3: An aircraft has to be loaded and operated in such a way that the center of gravity (CG) stays within the approved limits during all phases of flight. This is done to ensure ^t30q3
5351 
5452 [DE](../SPL%20Exam%20Questions%20DE/30%20-%20Flugleistung%20und%20Flugplanung.md#^t30q3) · [FR](../SPL%20Exam%20Questions%20FR/30%20-%20Performances%20et%20planification%20du%20vol.md#^t30q3)
....@@ -247,9 +245,7 @@
247245 
248246 #### Key Terms
249247 
250
-- **D** — Drag
251248 D — Drag
252
-
253249 ### Q12: The balance arm is the horizontal distance between ^t30q12
254250 
255251 [DE](../SPL%20Exam%20Questions%20DE/30%20-%20Flugleistung%20und%20Flugplanung.md#^t30q12) · [FR](../SPL%20Exam%20Questions%20FR/30%20-%20Performances%20et%20planification%20du%20vol.md#^t30q12)
....@@ -487,8 +483,8 @@
487483 
488484 #### Key Terms
489485 
490
-- **AGL** = Above Ground Level
491486 - **FL** = Flight Level
487
+- **AGL** = Above Ground Level
492488 - **ICAO** = International Civil Aviation Organization
493489 - **MSL** = Mean Sea Level
494490 - **NOTAM** = Notice to Air Missions
....@@ -987,8 +983,8 @@
987983 #### Key Terms
988984 
989985 - **AMSL** = Above Mean Sea Level
990
-- **ATC** = Air Traffic Control
991986 - **FL** = Flight Level
987
+- **ATC** = Air Traffic Control
992988 - **TMA** = Terminal Manoeuvring Area
993989 ### Q43: In which airspace class are you flying at 1400 m AMSL (QNH 1013 hPa) over Birrfeld aerodrome (47°25'36"N/007°14'02"E), and what are the visibility and cloud distance minima in that airspace? ^t30q43
994990 
....@@ -1080,8 +1076,8 @@
10801076 
10811077 #### Key Terms
10821078 
1083
-- **ATC** = Air Traffic Control
10841079 - **FL** = Flight Level
1080
+- **ATC** = Air Traffic Control
10851081 - **ICAO** = International Civil Aviation Organization
10861082 ### Q46: Until what time is La Côte aerodrome (LSGP) open in the evening? ^t30q46
10871083 
....@@ -1234,8 +1230,8 @@
12341230 #### Key Terms
12351231 
12361232 - **IAS** = Indicated Airspeed
1237
-- **ISA** = International Standard Atmosphere
12381233 - **TAS** = True Airspeed
1234
+- **ISA** = International Standard Atmosphere
12391235 ### Q50: You are flying in wave lift at 6000 m altitude. Which is the maximum speed you may fly? ^t30q50
12401236 
12411237 [DE](../SPL%20Exam%20Questions%20DE/30%20-%20Flugleistung%20und%20Flugplanung.md#^t30q50) · [FR](../SPL%20Exam%20Questions%20FR/30%20-%20Performances%20et%20planification%20du%20vol.md#^t30q50)
....@@ -1447,9 +1443,7 @@
14471443 
14481444 #### Key Terms
14491445 
1450
-- **D** — Drag
14511446 D — Drag
1452
-
14531447 ### Q59: A VFR flight will follow the route shown on the map below (dotted line) from APPENZELL towards MUOTATHAL. The route is planned for 19 March 2013 (winter time) between 1205 and 1255 LT. Answer using the DABS below. Which of these answers is correct? ^t30q59
14541448 
14551449 [DE](../SPL%20Exam%20Questions%20DE/30%20-%20Flugleistung%20und%20Flugplanung.md#^t30q59) · [FR](../SPL%20Exam%20Questions%20FR/30%20-%20Performances%20et%20planification%20du%20vol.md#^t30q59)
....@@ -1638,8 +1632,8 @@
16381632 
16391633 #### Key Terms
16401634 
1641
-- **IAS** = Indicated Airspeed
16421635 - **TAS** = True Airspeed
1636
+- **IAS** = Indicated Airspeed
16431637 ### Q67: What has to be particularly observed when landing in heavy rain? ^t30q67
16441638 
16451639 [DE](../SPL%20Exam%20Questions%20DE/30%20-%20Flugleistung%20und%20Flugplanung.md#^t30q67) · [FR](../SPL%20Exam%20Questions%20FR/30%20-%20Performances%20et%20planification%20du%20vol.md#^t30q67)
....@@ -1710,11 +1704,11 @@
17101704 
17111705 #### Key Terms
17121706 
1713
-- **AGL** = Above Ground Level
17141707 - **AMSL** = Above Mean Sea Level
1708
+- **AGL** = Above Ground Level
17151709 - **FL** = Flight Level
1716
-- **MSL** = Mean Sea Level
17171710 - **QNH** = Pressure adjusted to mean sea level
1711
+- **MSL** = Mean Sea Level
17181712 - **TMA** = Terminal Manoeuvring Area
17191713 ### Q70: Which of these statements is correct? ^t30q70
17201714 
....@@ -1739,9 +1733,7 @@
17391733 
17401734 #### Key Terms
17411735 
1742
-- **D** — Drag
17431736 D — Drag
1744
-
17451737 ### Q71: What is the effect of a waterlogged grass runway on landing? ^t30q71
17461738 
17471739 [DE](../SPL%20Exam%20Questions%20DE/30%20-%20Flugleistung%20und%20Flugplanung.md#^t30q71) · [FR](../SPL%20Exam%20Questions%20FR/30%20-%20Performances%20et%20planification%20du%20vol.md#^t30q71)
....@@ -1753,13 +1745,13 @@
17531745 
17541746 #### Answer
17551747 
1756
-A)
1748
+B)
17571749 
17581750 #### Explanation
17591751 
1760
-The correct answer is A because a waterlogged grass surface creates greater friction and drag on the landing gear during the ground roll, causing the glider to decelerate faster and stop in a shorter distance. The water acts as a braking medium.
1752
+The correct answer is B because a waterlogged grass surface reduces wheel braking effectiveness (similar to aquaplaning) during the ground roll, causing the glider to take longer to stop. While the soft ground adds some drag, the loss of braking friction dominates, resulting in a longer landing distance. This is consistent with the general rule that wet grass increases both takeoff and landing distances.
17611753 
1762
-- **B** is wrong because wet grass increases, not decreases, rolling resistance for a glider.
1754
+- **A** is wrong because shorter landing is the opposite of what happens on waterlogged grass.
17631755 - **C** is wrong because while directional control may be slightly affected, the primary effect is shortened stopping distance.
17641756 - **D** is wrong because surface conditions always affect landing distance.
17651757 
....@@ -1878,8 +1870,8 @@
18781870 #### Key Terms
18791871 
18801872 - **AMSL** = Above Mean Sea Level
1881
-- **IAS** = Indicated Airspeed
18821873 - **TAS** = True Airspeed
1874
+- **IAS** = Indicated Airspeed
18831875 ### Q77: At what speed must you fly to achieve the best glide ratio for a flying mass of 450 kg? (See attached sheet.) ^t30q77
18841876 
18851877 [DE](../SPL%20Exam%20Questions%20DE/30%20-%20Flugleistung%20und%20Flugplanung.md#^t30q77) · [FR](../SPL%20Exam%20Questions%20FR/30%20-%20Performances%20et%20planification%20du%20vol.md#^t30q77)
....@@ -2217,9 +2209,7 @@
22172209 
22182210 #### Key Terms
22192211 
2220
-- **n** — Load Factor (ratio of lift to weight: n = L/W)
22212212 n — Load Factor (ratio of lift to weight: n = L/W)
2222
-
22232213 ### Q91: The upper limit of LO R 16 equals ^t30q91
22242214 
22252215 [DE](../SPL%20Exam%20Questions%20DE/30%20-%20Flugleistung%20und%20Flugplanung.md#^t30q91) · [FR](../SPL%20Exam%20Questions%20FR/30%20-%20Performances%20et%20planification%20du%20vol.md#^t30q91)
....@@ -2417,9 +2407,7 @@
24172407 
24182408 #### Key Terms
24192409 
2420
-- **D** — Drag
24212410 D — Drag
2422
-
24232411 ### Q99: The term balance arm in the context of a mass and balance calculation defines the ^t30q99
24242412 
24252413 [DE](../SPL%20Exam%20Questions%20DE/30%20-%20Flugleistung%20und%20Flugplanung.md#^t30q99) · [FR](../SPL%20Exam%20Questions%20FR/30%20-%20Performances%20et%20planification%20du%20vol.md#^t30q99)