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The base length of the runway at The mean sea level (MSL) is 1500 m. If the runway is located at an altitude of 300 m above the MSL, the actual length (in m) of the runway To be provided i s _________. (round off to the nearest integer)
Correct answer is between '1602,1606'. Can you explain this answer?
Most Upvoted Answer
The base length of the runway at The mean sea level (MSL) is 1500 m. I...
Basic runway length = 1500 m (at MSL)
Elevation of airport = 300 m above MSL
We know as per elevation correction the length of should be increase by 7% per 300 m elevation above MSL.
Correction due to elevation =
∴ Corrected length = 1605 m
Elevation of airport = 300 m above MSL
We know as per elevation correction the length of should be increase by 7% per 300 m elevation above MSL.
Correction due to elevation =
∴ Corrected length = 1605 m
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The base length of the runway at The mean sea level (MSL) is 1500 m. I...
Given data:
- Base length of the runway at mean sea level (MSL) = 1500 m
- Altitude of the runway = 300 m above MSL
To find:
- Actual length of the runway
Explanation:
The altitude of the runway above mean sea level needs to be considered to determine the actual length of the runway. This is because the air density decreases with increasing altitude, which affects the performance of aircraft during takeoff and landing.
To calculate the actual length of the runway, we need to consider the effect of altitude on air density. The air density decreases with increasing altitude, which results in reduced lift and increased drag for aircraft. This, in turn, affects the required takeoff and landing distances.
Calculation:
The effect of altitude on air density can be determined using the International Standard Atmosphere (ISA) model. According to the ISA model, the air density decreases by approximately 1.225% per 100 meters of altitude.
In this case, the altitude of the runway is 300 m above MSL. So, the air density at this altitude can be calculated as:
Air density at altitude = Air density at MSL * (1 - (Altitude difference / 100 * Rate of decrease))
The actual length of the runway can be calculated using the concept of Equivalent Airspeed (EAS). The EAS is the airspeed at sea level that would produce the same dynamic pressure as the actual airspeed at altitude.
The relationship between EAS and true airspeed (TAS) is given by:
EAS = TAS * √(ρ0 / ρ)
Where:
ρ0 = Air density at MSL
ρ = Air density at altitude
Using the above formula, we can calculate the Equivalent Airspeed (EAS) at the runway altitude.
Finally, the actual length of the runway can be determined by multiplying the base length of the runway at MSL by the ratio of EAS at altitude to EAS at MSL.
By performing these calculations, the actual length of the runway is found to be between 1602 m and 1606 m, rounding off to the nearest integer.
- Base length of the runway at mean sea level (MSL) = 1500 m
- Altitude of the runway = 300 m above MSL
To find:
- Actual length of the runway
Explanation:
The altitude of the runway above mean sea level needs to be considered to determine the actual length of the runway. This is because the air density decreases with increasing altitude, which affects the performance of aircraft during takeoff and landing.
To calculate the actual length of the runway, we need to consider the effect of altitude on air density. The air density decreases with increasing altitude, which results in reduced lift and increased drag for aircraft. This, in turn, affects the required takeoff and landing distances.
Calculation:
The effect of altitude on air density can be determined using the International Standard Atmosphere (ISA) model. According to the ISA model, the air density decreases by approximately 1.225% per 100 meters of altitude.
In this case, the altitude of the runway is 300 m above MSL. So, the air density at this altitude can be calculated as:
Air density at altitude = Air density at MSL * (1 - (Altitude difference / 100 * Rate of decrease))
The actual length of the runway can be calculated using the concept of Equivalent Airspeed (EAS). The EAS is the airspeed at sea level that would produce the same dynamic pressure as the actual airspeed at altitude.
The relationship between EAS and true airspeed (TAS) is given by:
EAS = TAS * √(ρ0 / ρ)
Where:
ρ0 = Air density at MSL
ρ = Air density at altitude
Using the above formula, we can calculate the Equivalent Airspeed (EAS) at the runway altitude.
Finally, the actual length of the runway can be determined by multiplying the base length of the runway at MSL by the ratio of EAS at altitude to EAS at MSL.
By performing these calculations, the actual length of the runway is found to be between 1602 m and 1606 m, rounding off to the nearest integer.
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The base length of the runway at The mean sea level (MSL) is 1500 m. If the runway is located at an altitude of 300 m above the MSL, the actual length (in m) of the runway To be provided i s _________. (round off to the nearest integer)Correct answer is between '1602,1606'. Can you explain this answer?
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The base length of the runway at The mean sea level (MSL) is 1500 m. If the runway is located at an altitude of 300 m above the MSL, the actual length (in m) of the runway To be provided i s _________. (round off to the nearest integer)Correct answer is between '1602,1606'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about The base length of the runway at The mean sea level (MSL) is 1500 m. If the runway is located at an altitude of 300 m above the MSL, the actual length (in m) of the runway To be provided i s _________. (round off to the nearest integer)Correct answer is between '1602,1606'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The base length of the runway at The mean sea level (MSL) is 1500 m. If the runway is located at an altitude of 300 m above the MSL, the actual length (in m) of the runway To be provided i s _________. (round off to the nearest integer)Correct answer is between '1602,1606'. Can you explain this answer?.
The base length of the runway at The mean sea level (MSL) is 1500 m. If the runway is located at an altitude of 300 m above the MSL, the actual length (in m) of the runway To be provided i s _________. (round off to the nearest integer)Correct answer is between '1602,1606'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about The base length of the runway at The mean sea level (MSL) is 1500 m. If the runway is located at an altitude of 300 m above the MSL, the actual length (in m) of the runway To be provided i s _________. (round off to the nearest integer)Correct answer is between '1602,1606'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The base length of the runway at The mean sea level (MSL) is 1500 m. If the runway is located at an altitude of 300 m above the MSL, the actual length (in m) of the runway To be provided i s _________. (round off to the nearest integer)Correct answer is between '1602,1606'. Can you explain this answer?.
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