Bangalore Namma Metro - ಸ್ವಲ್ಪ ಜಾಗ ಕೊಡಿ

*****Technical Question about Twin Bo Bo 3-Phase Loco (i.e WAP-5)*****
Two Bo-Bo 3-Phase Speed Star is resting at BDTS, One is Non-Amul Livery the Fisrt One & the second One is in BRC's Majestic Amul Livery. (i.e BRC WAP-5 30071 & BRC WAP-5 30047)
BRC WAP-5 30071
Link: click here
BRC...
more...

WAP-5 30047
Link : click here
Pic Credit of both Pics: Sam
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Both WAP-5 and WAP-7 are best suited with LHB Coaches
Attached Images:
Passage in a LHB 3AC Coach
Western Toilet in a LHB 3AC Coach
Link of both Pic: click here
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Kindly answer the Following Technical Query : (All are Requested)
We all know WAP-7 is the best 3-Phase Passenger Loco in terms of Acceleration. Now my Query is why being the Lightest Loco (ONLY 78 Ton) WAP-5 takes more Time to accelerate in full swing while being the heaviest Loco (123 Ton) WAP-7 take least time to accelerate in Full Speed
Why is it so ?
Can anybody answer it citing the actual reason ?
Kya Jadu hai jo WAP-7 takes less time than WAP-5 to accelerate at full swing ?
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