property of lear siegler. navigational computer slide rule
TRANSCRIPT
![Page 1: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/1.jpg)
Property of Lear Siegler
![Page 2: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/2.jpg)
NAVIGATIONAL COMPUTERSLIDE RULE
![Page 3: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/3.jpg)
Terminal Learning Objective
At the end of this lesson the student will:
Action: Identify the components of the navigation computer slide rule problems
Condition: Given a computer and situational data
Standard: In Accordance With (IAW) Field Manual (FM) 3-04.240
![Page 4: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/4.jpg)
Enabling Learning Objective (ELO) #1
Action: Identify the scales, values, and spacing of the navigation computer slide rule
Condition: Given a navigation computer
Standard: IAW FM 1-240
![Page 5: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/5.jpg)
SLIDE RULE SCALES
Outer Scale: Stationary - Miles, Distance, or Quantity
![Page 6: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/6.jpg)
SLIDE RULE SCALES
Inner Scale: Rotating - Time or Rate
![Page 7: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/7.jpg)
SLIDE RULE VALUES
Values: Represent multiples of 10 on either
scale, e.g. 70 can represent .07, .7, 7.0, 70,
700, 7000, etc., dependentupon decimal placement.
![Page 8: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/8.jpg)
SLIDE RULE VALUES
Time scale values: 70 minutes on the
outer ring of the rotating scale can be convertedto 1:10 (one hour, ten minutes) on the hours
scale on the inner ring of the rotating scale
70 minutes
1 hr, 10 min
![Page 9: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/9.jpg)
SLIDE RULE SPACING
Spacing: spaces between numbers are not constant on
either scale.
From 60 to 15 (clockwise), unit values are 1.
From 15 to 30 (clockwise), unit values are 2.
From 30 to 60 (clockwise), unit values are 1/2.
![Page 10: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/10.jpg)
DECIMAL PLACEMENT
The units between 21 and 22 are represented by 5 spaces. The second unit past 21 can be read as 21.4 or 2140.
Read this as? 74, 7.4, 740
Read this as? 37.5, 375, 3750
21.4 or 2140.
![Page 11: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/11.jpg)
Questions?
![Page 12: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/12.jpg)
Enabling Learning Objective (ELO) #2
Action: Identify components of the slide rule computer
Condition: Given a navigation computer
Standard: IAW FM 1-240
![Page 13: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/13.jpg)
DISTANCE CONVERSIONINDICES
NAUT index - located at scale value 66, used for converting to
nautical miles.
STAT index - located at scale value 76, used for converting to
statute miles.
KM index - located at scale value 122, used for converting
to kilometers.
![Page 14: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/14.jpg)
INNER SCALE INDICES
SPEED index - located at 60 on the inner scale and
represented by a large black arrow. It is the hour index.
36 index - located at 36 on the inner scale and represented by a small arrow. It is the second
index (divides one hour into3,600 seconds).
![Page 15: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/15.jpg)
INNER SCALE WINDOWS
ALTITUDE COMPUTATIONS WINDOW
Located immediately to the right of the hour index.
True altitude computations.
Temperature scale - • Located inside of window.• Temperature range from - 80° C to + 50°C.
![Page 16: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/16.jpg)
INNER SCALE WINDOWS
ALTITUDE COMPUTATIONS WINDOW
True altitude computations.
Altitude scale - • Located under temperature window.• Altitude range from
-2000 ft to 34,000 ft in increments of 2000 ft, 35,000 ft to 80,000 ft use the same mark.
![Page 17: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/17.jpg)
INNER SCALE WINDOWS
AIRSPEED COMPUTATIONS WINDOW
Located across fromthe hour index.
Used for True airspeed anddensity altitude computations.
![Page 18: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/18.jpg)
INNER SCALE WINDOWS
AIRSPEED COMPUTATIONS WINDOW
True airspeed computations.
Temperature scale - • Located above window.• Temperature range from + 50°C to - 80°C.• Negative temps are right, positive temps are left.
![Page 19: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/19.jpg)
INNER SCALE WINDOWS
AIRSPEED COMPUTATIONS WINDOW
True airspeed computations.
Altitude scale - • Located in window.• Altitude range from
-2000 ft to 80,000 ft in increments of 1000 ft.
![Page 20: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/20.jpg)
INNER SCALE WINDOWS
DENSITY ALTITUDE WINDOW
Located above airspeed window and used to determinedensity altitude.
• Uses airspeed window to set up temperature and altitude.• Altitude range from - 10,000 ft to 80,000 ft, increments of 1,000 ft.
![Page 21: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/21.jpg)
Questions?
![Page 22: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/22.jpg)
Enabling Learning Objective (ELO) #3
Action: Compute simple proportion problems
Condition: Given a navigation computer and data
Standard: IAW FM 1-240
![Page 23: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/23.jpg)
PROPORTIONS
A simple proportion is afractional relationship between
numbers and is expressed as a ratio.
Example:• 20:40 represents a fraction of one-half
(reduced to it’s lowest common denominator),or expressed as a ratio, 1:2 (one to two).
• 12:16, 12 on the outer scale over 16on the inner scale is a 3/4 or three to fourrelationship.
![Page 24: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/24.jpg)
Proportions In Problem Solving
Problem:• How many pounds are in 120 gallons of JP- 8?
Solution:• At least three factors must be known to solve
for the unknown (X).• There are 6.7 pounds in each gallon of JP-8.• The three known are:
1. 6.7 lbs.2. 1 gallon3. 120 gallons
• The ratio is: 6.7 : X 1 120
![Page 25: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/25.jpg)
Proportions In Problem Solving
Problem:• How many lbs are
in 120 gallons of JP- 8?
1. Set 6.7 on the outer scale over 1.0 on the inner scale.
2. Find 120 on the inner scale and read 805 lbs above 120 gallons.
![Page 26: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/26.jpg)
Questions?
![Page 27: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/27.jpg)
Enabling Learning Objective (ELO) #4
Action: Convert distance measurements
Condition: Given a navigation computer and data
Standard: IAW FM 1-240
![Page 28: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/28.jpg)
Distance Measuring Units
Problem:• How many statute miles equals 90 nautical
miles? How many kilometers equals 90 nautical miles?
![Page 29: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/29.jpg)
Problem:• X SM = 90 NM?
X KM = 90 NM?
1. Set 90 NM under the NAUT index.
2. Read 104 SM under the STAT index.
Distance Measuring Units
2. Read 166 KM under the KM index.
![Page 30: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/30.jpg)
Questions?
![Page 31: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/31.jpg)
Enabling Learning Objective (ELO) #5
Action: Determine ground speed
Condition: Given a navigation computer and situational data
Standard: IAW FM 1-240
![Page 32: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/32.jpg)
Ground speed equals distancedivided by time.
Problem:• What is the ground speed if it takes
35 minutes to fly 80 nautical miles?
![Page 33: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/33.jpg)
Problem:• 35 Min to fly 80
NM. GS = X.
Ground Speed Problems
1. Set 35 (inner scale) under 80 (outer scale).2. Read 137 kts (knots) over the speed index, (60 minutes).
![Page 34: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/34.jpg)
Ground speed equals distancedivided by time.
Problem:• What is the ground speed if it takes
if it takes 9 minutes to fly 28 kilometers?
NOTE!Ground speed is measured in knots (nauticalmiles per hour). You must convert distance to nautical miles in order to solve for knots!
![Page 35: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/35.jpg)
Problem:• 9 min to fly 28
KM. GS = X.
Ground Speed Problems
1. Set 28 under the KM index.
2. Read 15.2 NM under the NAUT index.First, convert KM to NM.
![Page 36: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/36.jpg)
Problem:• 9 min to fly 28
KM. (15.2 NM). GS = X.
Ground Speed Problems
3. Set 15.2 (outer scale) over 9 (inner scale.
4. Read GS, 101 kts, over the 60 index.
![Page 37: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/37.jpg)
Questions?
![Page 38: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/38.jpg)
Enabling Learning Objective (ELO) #6
Action: Determine time required
Condition: Given a navigation computer and situational data
Standard: IAW FM 1-240
![Page 39: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/39.jpg)
Time equals distance dividedby ground speed.
Problem:• How much time is required to fly 333
nautical miles at a ground speed of 174 knots?
![Page 40: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/40.jpg)
Problem:• Dis. = 333 NM,
GS = 174. Time = X.
Time Required Problems
1. Set 60 index under 174.
2. Read 115 minutes, under 333.
NOTE!115 min can be read as
1hr, 55 min, on inner scale of rotating scale.
![Page 41: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/41.jpg)
Questions?
![Page 42: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/42.jpg)
Enabling Learning Objective (ELO) #7
Action: Convert time-distance problems
Condition: Given a navigation computer and situational data
Standard: IAW FM 1-240
![Page 43: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/43.jpg)
Convert Time-Distance Problems
Problem:• If 50 minutes are required to travel 120
nautical miles, how many minutes are requiredto travel 86 nautical miles at the same rate?
![Page 44: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/44.jpg)
Problem:• 50 min. = 120NM
X min = 86NM.
Time-Distance Problems
1. Set 50 min under 120 NM.
2. Read 36 min under 86 NM.
![Page 45: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/45.jpg)
Convert Time-Distance Problems
Problem:• Your ground speed is 130 knots, you have
flown for 1 hour and 20 minutes. How many nautical miles have you traveled?
![Page 46: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/46.jpg)
Problem:• GS = 130 knots,
1 hr, 20 min, distance = X
Time-Distance Problems
1. Set speed index under 130.
2. Read the distance, 174 NM, over the 1hr, 20 min mark.
![Page 47: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/47.jpg)
Questions?
![Page 48: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/48.jpg)
Enabling Learning Objective (ELO) #8
Action: Solve rate-time-distance problems using the 36 index
Condition: Given a navigation computer and situational data
Standard: IAW FM 1-240
![Page 49: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/49.jpg)
Solving problems using the 36 index.
NOTE!Use the 36 index whenever the distance is
less than 1/10th of the ground speed.
Used whenever time must be calculated in seconds and minutes instead of minutes and hours.
![Page 50: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/50.jpg)
Solving problems using the 36 index.
Problem involving less than 60 seconds:• What is the time required if the ground
speed is 100 knots and the distance is 0.5 NM?
![Page 51: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/51.jpg)
Problem:• GS = 100 knots,
distance = 0.5NM time required = X.
Solving problems using the 36 Index
1. Set 36 index (3,600 sec) under 100 NM.
2. Read the time, 18 seconds, under the 0.5 NM mark.
![Page 52: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/52.jpg)
Solving problems using the 36 index.
Problem involving more than 60 seconds:• What is the time required if the ground speed
is 95 knots and the distance is 5 nautical miles?
![Page 53: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/53.jpg)
Problem:• GS = 95 knots,
distance = 5NM time required = X.
Solving problems using the 36 Index
1. Set 36 index (3,600 sec) under 95 NM.
2. Read the time, 190 seconds,(3 min, 10 sec), under the 5 NM mark.
![Page 54: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/54.jpg)
Questions?
![Page 55: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/55.jpg)
Enabling Learning Objective (ELO) #9
Action: Determine rate of fuel consumption
Condition: Given a navigation computer and situational data
Standard: IAW FM 1-240
![Page 56: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/56.jpg)
Fuel Consumption
Rate of fuel consumption equals gallons offuel consumed divided by time.
![Page 57: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/57.jpg)
Fuel Consumption
Problem:• What is the rate of fuel
consumption if 30 gallons of fuelare consumed in 111 minutes(1 hour, 51 minutes)?
![Page 58: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/58.jpg)
Problem:• 30 gallons,
111 minutes (1+51), GPH = X.
Fuel Consumption
1. Set 111 minutes under 30 gallons.
2. Read the rate, 16.2 gallons over the speed (60) index.
![Page 59: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/59.jpg)
Fuel Consumption
Problem:• What is the rate of fuel
consumption if 300 lbs of fuelare consumed in 111 minutes(1 hour, 51 minutes)?
![Page 60: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/60.jpg)
Problem:• 300 lbs,
111 minutes (1+51), PPH = X.
Fuel Consumption
1. Set 111 minutes under 300 pounds.
2. Read the rate, 162 pounds over the speed (60) index.
![Page 61: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/61.jpg)
Questions?
![Page 62: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/62.jpg)
Enabling Learning Objective (ELO) #10
Action: Compute true airspeed
Condition: Given a navigation computer and situational data
Standard: IAW FM 1-240
![Page 63: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/63.jpg)
Compute True Airspeed
True airspeed is calibrated airspeedcorrected for pressure and temperature.
![Page 64: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/64.jpg)
Compute True Airspeed
Problem:• What is the TAS if the FAT
is - 15° C, the pressure altitude is8,000 ft, and the CAS is 125 knots?
![Page 65: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/65.jpg)
Compute True Airspeed
NOTE!Use window marked
“FOR AIRSPEED AND DENSITY ALTITUDE COMPUTATION”
![Page 66: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/66.jpg)
Problem:• FAT = - 15° C,
PA = 8,000ft, CAS = 125 kts, TAS = X.
Compute True Airspeed
1. Set 8,000 ft under - 15° in the airspeed computation window.
2. Over 125, inner scale, read TAS 137 kts.
![Page 67: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/67.jpg)
Questions?
![Page 68: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/68.jpg)
Enabling Learning Objective (ELO) #11
Action: Compute density altitude
Condition: Given a navigation computer and situational data
Standard: IAW FM 1-240
![Page 69: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/69.jpg)
Solving for Density Altitude
Density altitude is pressure altitudecorrected for temperature.
![Page 70: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/70.jpg)
Compute Density Altitude
NOTE!Use the same window as for true altitude computations -
“FOR AIRSPEED AND DENSITY ALTITUDE COMPUTATION”
![Page 71: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/71.jpg)
Compute Density Altitude
Problem:• What is the density
altitude if the FAT is - 15°C andthe pressure altitude is 8,000 ft?
![Page 72: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/72.jpg)
Problem:• FAT = - 15° C,
PA = 8,000ft, DA = X.
Compute Density Altitude
1. Set 8,000 ft under - 15° in the airspeed computation window.
2. Over DA index, read DA 6,200 ft.
NOTE!
Accurate results can only be obtained by using pressure altitude. Pressure altitude can be obtained by setting the altimeter to 29.92” of mercury and reading the pressure altitude
directly from the altimeter.
![Page 73: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/73.jpg)
Questions?
![Page 74: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/74.jpg)
Enabling Learning Objective (ELO) #12
Action: Compute true altitude
Condition: Given a navigation computer and situational data
Standard: IAW FM 1-240
![Page 75: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/75.jpg)
Solving for True Altitude
True altitude is the altitude above MSL.True Altitude is determined bycorrecting indicated altitude
for temperature and pressure.
![Page 76: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/76.jpg)
Compute True Altitude
NOTE!Use the window labeled
“FOR ALTITUDE COMPUTATIONS”
![Page 77: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/77.jpg)
Compute True Altitude
Problem:• What is the true altitude
(TALT) if the FAT is - 15°C, thepressure altitude is 2,000 ft and theindicated altitude (IALT) is 2,100 ft?
![Page 78: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/78.jpg)
Compute True Altitude
1. Set 2,000 ft under - 15° in the altitude computation window.
2. Above 2,100 ft (IALT), read 1910 ft (TALT).
Problem:• FAT = - 15° C,
PA = 2,000 ft, IALT = 2,100 ft.
Problem:• FAT = - 15° C,
PA = 2,000 ft, IALT = 2,100 ft.
![Page 79: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/79.jpg)
Questions?
![Page 80: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/80.jpg)
Questions?
For reference while working problems:
FM 3-04.240 Chapter 5, Paragraph 5-1 through 5-17
![Page 81: Property of Lear Siegler. NAVIGATIONAL COMPUTER SLIDE RULE](https://reader035.vdocument.in/reader035/viewer/2022062518/56649dbf5503460f94ab2c64/html5/thumbnails/81.jpg)
Property of Lear Siegler