EF1 How To Videos

Field elevation is 4,250 ft MSL, the altimeter setting is 29.78 inHg and the temperature is 88°F. What is the density altitude?

• A) 4,380 ft
• B) 6,100 ft
• C) 7,200 ft

1. Press TRIP, scroll to Altitude, press Select.
2. Indicated Altitude: enter 4250 FT, press Select.
3. Barometer: enter 29.78 inHg, press Select. Pressure altitude appears.
4. Outside Air Temperature: enter 88 (°F), press Select. Density altitude appears.

Pressure altitude stays at 2,500 ft while the temperature rises from 40°F to 75°F. How does density altitude change?

• A) Increases about 1,500 ft
• B) Increases about 2,300 ft
• C) Decreases about 2,300 ft

1. Open Trip, Altitude and press C to clear the screen.
2. Indicated Altitude: enter 2500 FT, press Select.
3. Barometer: enter 29.92 inHg, press Select. Pressure altitude shows 2,501 ft (standard pressure is exactly 29.9213 inHg, so entering 29.92 adds about 1 ft; treat it as 2,500 ft).
4. Outside Air Temperature: enter 40 (°F), press Select. Highlight the density altitude and press Brain to save it.
5. Press PREV to get back to the Altitude screen, press C to clear it, and start from the top: Indicated Altitude 2500 FT, Barometer 29.92 inHg, then Outside Air Temperature 75 (°F), pressing Select after each. Highlight the new density altitude and press Brain to save it.
6. Press CALC. Both density altitudes are saved in Brain. Press Brain and load the 75°F density altitude, press −, then press Brain and load the 40°F density altitude. Press = to see the change.

Condition 1 is 80°F at a pressure altitude of 2,000 ft. Condition 2 is 45°F at a pressure altitude of 3,500 ft. What happens to density altitude going from condition 1 to condition 2?

• A) Increases about 400 ft
• B) Decreases about 400 ft
• C) Decreases about 1,500 ft

1. Open Trip, Altitude and press C.
2. Enter Indicated Altitude 2000 FT, Barometer 29.92 inHg, Outside Air Temperature 80 (°F). Pressure altitude shows 2,001 ft (standard pressure is exactly 29.9213 inHg, so entering 29.92 adds about 1 ft; treat it as 2,000 ft). Save the density altitude with Brain.
3. Press PREV to get back to the Altitude screen, press C to clear it, and start from the top: Indicated Altitude 3500 FT, Barometer 29.92 inHg, then Outside Air Temperature 45 (°F), pressing Select after each. Pressure altitude shows 3,501 ft, the same extra 1 ft. Highlight the new density altitude and press Brain to save it.
4. Press CALC. Both density altitudes are saved in Brain. Press Brain and load the condition 2 density altitude (45°F), press −, then press Brain and load the condition 1 density altitude (80°F). Press =. A negative result means density altitude went down.

You are landing on Runway 27 and the tower reports wind 310 at 24 knots. What is the crosswind component?

• A) 15 knots
• B) 18 knots
• C) 24 knots

1. Open Trip, Wind Component.
2. Wind Direction: enter 310°, press Select.
3. Wind Speed: enter 24 KTS, press Select.
4. Runway: enter 27 (the runway number, not 270), press Select.

The wind is 60° off the runway and your airplane's maximum crosswind component is 20 knots. What is the strongest wind you can accept?

• A) 21 knots
• B) 23 knots
• C) 26 knots

1. Open Trip, Wind Component and press C.
2. Wind Direction: enter 060°, press Select. (Any runway and wind 60° apart works. This one pairs with Runway 36.)
3. Wind Speed: enter the first answer choice, 21 KTS, press Select.
4. Runway: enter 36, press Select. Note the crosswind.
5. Change Wind Speed to 23 KTS, then 26 KTS, and note the crosswind each time.
6. Pick the highest wind speed that keeps the crosswind at or below 20 knots.

The wind is 220 at 25 knots and your maximum crosswind component is 15 knots. Which runway can you use?

• A) Runway 18
• B) Runway 24
• C) Runway 27

1. Open Trip, Wind Component and press C.
2. Wind Direction 220°, Wind Speed 25 KTS.
3. Enter each runway in turn: 18, 24, 27.
4. Pick the runway with a crosswind at or below 15 knots.

At an airport with a field elevation of 1,200 ft MSL, the surface temperature is 74°F and the dew point is 52°F. At about what altitude MSL would you expect the base of cumulus clouds?

• A) 5,000 ft MSL
• B) 6,200 ft MSL
• C) 9,500 ft MSL

1. Open Trip, Cloud Base.
2. Outside Air Temperature: enter 74 (°F), press Select.
3. Dew Point: enter 52 (°F), press Select. The EF1 shows the base above ground level (AGL).
4. Add the field elevation to get MSL.

What are the standard temperature and standard pressure at 7,500 ft?

• A) 15°C and 29.92 inHg
• B) 0°C and 22.65 inHg
• C) 0°C and 29.92 inHg

1. Open Trip, Standard Atmosphere.
2. Altitude: enter 7500 FT, press Select.
3. Read the standard pressure and temperature. Press C/U on the temperature to switch between °F and °C.

How far will you travel in 12 minutes at a groundspeed of 132 knots?

• A) 22 nautical miles
• B) 26 nautical miles
• C) 31 nautical miles

1. Open Trip, Ground Speed and press C.
2. Duration: press C/U until it shows HMS, then enter 00:12:00 and press Select.
3. Ground Speed: enter 132 KTS, press Select. Distance appears.

Your true course is 210°, true airspeed is 125 knots and the wind is from 160° at 22 knots. What true heading do you fly, and what is your groundspeed?

• A) 202° and 110 knots
• B) 218° and 110 knots
• C) 202° and 135 knots

1. Open Trip, Wind Correction and press C.
2. True Course: enter 210°, press Select.
3. True Airspeed: enter 125 KTS, press Select.
4. Wind Direction: enter 160°, press Select.
5. Wind Speed: enter 22 KTS, press Select. Groundspeed, wind correction angle and true heading appear.

A leg is 84 nautical miles on a true course of 340°. True airspeed is 118 knots and the wind is from 270° at 20 knots. Allow 3 minutes for the climb. What is the estimated time en route?

• A) 43 minutes
• B) 46 minutes
• C) 49 minutes

1. Open Trip, Wind Correction and press C.
2. Enter True Course 340°, True Airspeed 118 KTS, Wind Direction 270°, Wind Speed 20 KTS. Groundspeed appears.
3. Press PREV for the Trip menu and open Ground Speed. The groundspeed from Wind Correction is already filled in, so don't press C.
4. Enter Distance 84 NM. Duration appears.
5. Add 3 minutes for the climb.

You cross point A at 1420 and need to reach point B, 58 nautical miles away, at 1445. True course is 095°, the wind is from 050° at 18 knots, pressure altitude is 6,500 ft and the temperature is +5°C. What calibrated airspeed do you need?

• A) 124 knots
• B) 138 knots
• C) 152 knots

1. Groundspeed: open Trip, Ground Speed. On Duration press C/U until it shows HMS and enter 00:25:00, then enter Distance 58 NM. Groundspeed appears. Press PREV for the Trip menu.
2. True airspeed: open Wind Correction. The groundspeed from Ground Speed is already filled in, so don't press C. Enter True Course 095°, Wind Direction 050°, Wind Speed 18 KTS. True airspeed appears. Press PREV for the Trip menu.
3. Calibrated airspeed: open Airspeed. The true airspeed from Wind Correction is already filled in, so don't press C. On Outside Air Temperature press C/U for °C and enter 5 (°C), then enter Pressure Altitude 6500 FT. Calibrated Airspeed appears.

True course is 045°, true airspeed is 110 knots and the wind is from 360° at 18 knots. Magnetic variation is 8°W and the compass card shows +2° deviation. What compass heading do you fly?

• A) 030°
• B) 046°
• C) 048°

1. Press X/C, select Add Checkpoint, then select View/Change to open Checkpoint 1.
2. Enter True Course 045°, True Airspeed 110 KTS, Wind Direction 360°, Wind Speed 18 KTS.
3. Variation: enter 8° (west is positive, east is negative), press Select.
4. Deviation: enter 2°, press Select. True, magnetic and compass headings appear.

A day VFR flight is 145 nautical miles at a groundspeed of 112 knots. The airplane burns 9.2 gallons per hour. How much fuel is needed, including the 30 minute day VFR reserve?

• A) 12 gallons
• B) 16.5 gallons
• C) 19 gallons

1. Open Trip, Ground Speed. Enter Distance 145 NM and Ground Speed 112 KTS. Note the duration.
2. Add 30 minutes for the reserve.
3. Open Fuel Burn. Duration: press C/U until it shows HMS, then enter 01:47:41 (the 1:17:41 flight plus 30 minutes). Rate: enter 9.2 GPH. Volume appears.

Empty weight 1,495 lb at 38.2 in. Pilot and front passenger 340 lb at 37.0 in. Rear passenger 150 lb at 73.0 in. Fuel 40 gallons at 48.0 in. Baggage 45 lb at 95.0 in. What are the total weight and the CG?

• A) 2,270 lb and 42.5 in
• B) 2,030 lb and 41.8 in
• C) 2,270 lb and 45.1 in

1. Press W/B. In Aircraft Configuration, set Configuration In Use to Off. Press PREV to go back to the main W/B screen.
2. Open Weight & Balance. Set Reduction Factor to 1.
3. Station 1: weight 1495 LB, arm 38.2 IN.
4. Add stations for 340 LB at 37.0 IN, 150 LB at 73.0 IN, fuel 240 LB at 48.0 IN (40 gal of AvGas × 6.0 LB/gal: type 40 × 6 right on the weight line and the EF1 fills in 240), and 45 LB at 95.0 IN.
5. Scroll to Totals.

The airplane weighs 3,100 lb and the CG must move forward 2.5 in. Baggage can move from the aft compartment at 150 in to the forward compartment at 30 in. How much baggage must you move?

• A) 52 lb
• B) 65 lb
• C) 78 lb

1. Press W/B and open Weight Shift.
2. Total Weight: enter 3100 LB, press Select.
3. Delta CG: enter 2.5 IN, press Select.
4. Delta Arm: you can do the math right on the line. Type 150 − 30 and the EF1 fills in 120 IN, then press Select. Item Weight appears.

A takeoff table shows a ground roll of 1,150 ft at 2,000 ft pressure altitude and 1,410 ft at 4,000 ft. What is the ground roll at 3,200 ft?

• A) 1,250 ft
• B) 1,300 ft
• C) 1,410 ft

1. Open Trip, Interpolation. TYPE: press C/U until it shows Altitude.
2. Lower Reference: press C/U for FT, enter 2000 FT, press Select.
3. Lower Result: press C/U until it shows NUM before you type, then enter 1150 (the ground roll in feet) and press Select.
4. Upper Reference 4000 FT, Upper Result 1410 (NUM).
5. Target Value Needed 3200 FT. The result appears.

You need to descend from 8,500 ft to 3,000 ft over 20 nautical miles at a groundspeed of 140 knots. What rate of descent do you need?

• A) 550 feet per minute
• B) 640 feet per minute
• C) 780 feet per minute

1. Open Trip, Climb & Descent.
2. Distance: enter 20 NM, press Select.
3. Descent: you can do the math right on the line. Type 8500 − 3000 and the EF1 fills in 5500 FT, then press Select.
4. Ground Speed: enter 140 KTS, press Select. Rate of descent appears.

You are heading 305° toward the VOR. ATC clears you to hold west of the VOR on the 270° radial with standard right turns. Which entry should you use, and what is the inbound course?

• A) Direct, inbound 270°
• B) Teardrop, inbound 090°
• C) Parallel, inbound 090°

1. Open Trip, Holding Pattern.
2. Turn Direction: set Right, press Select.
3. Heading: enter 305°, press Select.
4. Hold: enter 270°, press Select. Pattern Entry and Inbound appear.