Civil Engineering - Airport Engineering - Discussion

Discussion :: Airport Engineering - Section 1 (Q.No.3)


For the proposed runway stated in if the aerodrome reference temperature is 17°.2, the net designed length of the runway is

[A]. 2716 m
[B]. 2816 m
[C]. 2916 m
[D]. 3016 m

Answer: Option B


No answer description available for this question.

Kamal said: (Mar 13, 2015)  
How 2816?

Prabesh Mahatara said: (Jun 2, 2015)  
How Please calculation by processing?

Aparna said: (Dec 1, 2015)  
Am I correct?

The actual runway length= 2,000 m.

Temperature correction:

1 degree --> 1%.

17 degree--> 17% extra.

Corrected runway length = 2000+((17/100)*2000) = 2340 m.

But how the answer is 2816 m.

Can anybody explain it?

M.Farooq said: (Mar 16, 2017)  
Please define the answer clearly.

Satya said: (Mar 27, 2017)  

How you have taken actual value as 2000m & temperature correction as 1 degree?

Can you clarify me?

Viral Kohli said: (May 17, 2017)  

For every degree rise in temp 1% temperature correction is to be applied IRC recommendation.

Tanuj Agarwal said: (Aug 15, 2017)  
The data in the question is insufficient.

1. Basic Runway length is missing.
2. Elevation of the airport above MSL is missing.
The rise in temp at the particular elevation= [ART- {15-(0.0065*elevation)].
The corrected runway length would be = basic runway length+ [rise in temp*Basic length/100].

Anjila Bhatta said: (Jun 1, 2018)  

1% per 1 degree rise in temperature above airport standard temperature of 15°, so basically it should be around 2%.

Anjila Bhatta said: (Jun 1, 2018)  
"The length of a runway under standard atmospheric conditions is 2000 m. If the actual reduced level of the site is 1200 m, if the aerodrome reference temperature is 17.2, the net designed length of the runway is" is the actual question.

Ranku Biswas said: (May 14, 2019)  

The above question is incorrect and data is missing.

After considering your question the combined correction for both temperature and elevation is 2534.4 which is 40.8% of basic length. And that's an error as per ICAO. Remodelling should be done.

Navya said: (Apr 14, 2020)  
The standard length for larger aircraft is 2400 and for light - 1800.

17.2 degree.
2400 * 0.172 = 412.8.
2400 + 412.8 = 2812.8.

Raushan said: (Jul 27, 2020)  
Great, thanks @Navya.

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