Comprehension
Read the paragraph and answer the questions given below:
Finally, your aero model is ready for a test flight. Flying a model is an exacting task, like building it. The site, foliage, weather, wind and safety restrictions all affect the flying. In certain cities, like the national capital, flying of models and drones is prohibited. The aero model should not be flown higher than 400 feet within three miles of an airport.
A large field would be an ideal choice for flying. Make sure that there are no tall trees and thick foliage in the area. Trees can cause air pockets and downdraughts and often ‘‘suck’’ the model into the branches.
Having selected a site, now check your model for alignment. A misaligned model will fly haywire and might even get lost. So look at the nose, tail and the wings of the model minutely. No component should be out of place, loose or warped. A balanced model will stay on its point of balance. A calm day with little or no wind will be an ideal situation.
Now hold your model on the point of balance, i.e. approximately one-third back from the leading edge of the wings, and gently launch it in the air with the nose slightly upward. The model will glide gracefully and land on its wheels.
Finally, your aero model is ready for a test flight. Flying a model is an exacting task, like building it. The site, foliage, weather, wind and safety restrictions all affect the flying. In certain cities, like the national capital, flying of models and drones is prohibited. The aero model should not be flown higher than 400 feet within three miles of an airport.
A large field would be an ideal choice for flying. Make sure that there are no tall trees and thick foliage in the area. Trees can cause air pockets and downdraughts and often ‘‘suck’’ the model into the branches.
Having selected a site, now check your model for alignment. A misaligned model will fly haywire and might even get lost. So look at the nose, tail and the wings of the model minutely. No component should be out of place, loose or warped. A balanced model will stay on its point of balance. A calm day with little or no wind will be an ideal situation.
Now hold your model on the point of balance, i.e. approximately one-third back from the leading edge of the wings, and gently launch it in the air with the nose slightly upward. The model will glide gracefully and land on its wheels.
Question: 1
What is the distance and height restriction when flying a model in the vicinity of an airport?
What is the distance and height restriction when flying a model in the vicinity of an airport?
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The 400-foot height limit is standard worldwide. It creates a safe buffer zone below civil airspace, which usually starts at $500\text{ feet}$ AGL for manned flights.
Updated On: Jul 2, 2026
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Solution and Explanation
Step 1: Locating Key Phrases in the Text:
We scan the first paragraph of the passage looking for coordinates, numbers, or spatial values near the word “airport”.
Step 2: Extracting Direct Evidence:
The final sentence of the first paragraph explicitly states: “The aero model should not be flown higher than 400 feet within three miles of an airport.”
Step 3: Detailing the Safety Restrictions:
For safety reasons and to avoid any interference with manned aircraft during critical take-off and landing phases, two limits must be observed:
• Distance Restriction: The model must not be flown within a 3-mile radius (approx. $4.8\text{ km}$) of an airport.
• Height/Altitude Restriction: The maximum height is limited to 400 feet (approx. $122\text{ meters}$) above ground level.
We scan the first paragraph of the passage looking for coordinates, numbers, or spatial values near the word “airport”.
Step 2: Extracting Direct Evidence:
The final sentence of the first paragraph explicitly states: “The aero model should not be flown higher than 400 feet within three miles of an airport.”
Step 3: Detailing the Safety Restrictions:
For safety reasons and to avoid any interference with manned aircraft during critical take-off and landing phases, two limits must be observed:
• Distance Restriction: The model must not be flown within a 3-mile radius (approx. $4.8\text{ km}$) of an airport.
• Height/Altitude Restriction: The maximum height is limited to 400 feet (approx. $122\text{ meters}$) above ground level.
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Question: 2
How do trees pose a problem for aero model flying?
How do trees pose a problem for aero model flying?
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Always fly in open, clear fields. Trees act like physical magnets for delicate models, and the wind turbulence around them makes control very difficult.
Updated On: Jul 2, 2026
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Verified By Collegedunia
Solution and Explanation
Step 1: Scanning for Environmental Barriers:
We scan the second paragraph of the text specifically looking for references to “trees”, “foliage”, or obstacles.
Step 2: Extracting the Textual Evidence:
The middle sentences of the second paragraph state: “Trees can cause air pockets and downdraughts and often ‘suck' the model into the branches.”
Step 3: Explaining the Problems Caused by Trees:
According to the text, trees present two main problems:
• Aerodynamic Turbulence: Trees obstruct wind flow, creating localized low-pressure zones (air pockets) and sudden descending currents (downdraughts). These unstable air movements can cause the model to lose lift and crash.
• Physical Entrapment: The branches can physically trap or damage the model, an effect referred to as "sucking" the model into the thick foliage.
We scan the second paragraph of the text specifically looking for references to “trees”, “foliage”, or obstacles.
Step 2: Extracting the Textual Evidence:
The middle sentences of the second paragraph state: “Trees can cause air pockets and downdraughts and often ‘suck' the model into the branches.”
Step 3: Explaining the Problems Caused by Trees:
According to the text, trees present two main problems:
• Aerodynamic Turbulence: Trees obstruct wind flow, creating localized low-pressure zones (air pockets) and sudden descending currents (downdraughts). These unstable air movements can cause the model to lose lift and crash.
• Physical Entrapment: The branches can physically trap or damage the model, an effect referred to as "sucking" the model into the thick foliage.
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Question: 3
How should a model be held for its launch?
How should a model be held for its launch?
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Holding the model behind or ahead of its point of balance will cause it to pitch up and stall or dive straight into the ground. A one-third back grip ensures perfect stability.
Updated On: Jul 2, 2026
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Verified By Collegedunia
Solution and Explanation
Step 1: Locating Launch Instructions:
We scan the final paragraph of the text looking for terms like “hold”, “balance”, “launch”, or “nose”.
Step 2: Extracting the Textual Guidance:
The final paragraph guides the reader step-by-step: “Now hold your model on the point of balance, i.e. approximately one-third back from the leading edge of the wings, and gently launch it in the air with the nose slightly upward.”
Step 3: Explaining the Correct Holding and Launch Posture:
To launch the model successfully:
• The Holding Point: Grip the model precisely at its "point of balance," which is located approximately one-third of the chord distance back from the wing's front (leading) edge.
• The Launch Angle: Cast the model forward gently into the wind, keeping the nose pitched slightly upward to ensure a smooth, stable glide.
We scan the final paragraph of the text looking for terms like “hold”, “balance”, “launch”, or “nose”.
Step 2: Extracting the Textual Guidance:
The final paragraph guides the reader step-by-step: “Now hold your model on the point of balance, i.e. approximately one-third back from the leading edge of the wings, and gently launch it in the air with the nose slightly upward.”
Step 3: Explaining the Correct Holding and Launch Posture:
To launch the model successfully:
• The Holding Point: Grip the model precisely at its "point of balance," which is located approximately one-third of the chord distance back from the wing's front (leading) edge.
• The Launch Angle: Cast the model forward gently into the wind, keeping the nose pitched slightly upward to ensure a smooth, stable glide.
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