Twice I boarded a train which I thought the air con was not working. I got off, took a seat at the platform benches and waited for the next train.
Today, again I thought I boarded a non aircon train. Then I realised something, on all those occasions, I was in the coach right in front, the very first coach. So this timeI got off and went to the second coach, the air con there was as per normal.
Is there a air flow problem in the first coach of MRT trains?
Originally posted by mancha:Twice I boarded a train which I thought the air con was not working. I got off, took a seat at the platform benches and waited for the next train.
Today, again I thought I boarded a non aircon train. Then I realised something, on all those occasions, I was in the coach right in front, the very first coach. So this timeI got off and went to the second coach, the air con there was as per normal.
Is there a air flow problem in the first coach of MRT trains?
Should not be - the only difference the "front" and the "middle" cars are that the 4 cars in the middle are motor cars, while the ends do not have motors. Should not really make a difference...
In general, air flows through the gangway and door gaps when you are in the tunnel, which increases as you proceed further to the rear of the train.
Sometime, when the cars are less packed, I will try walking down the train and feel the difference.
I thought it was some sort of vortex in the first car, as I did not feel the draft there as I can in other cars.
I shall now try the last car and see if there's any difference.
Thanks for the replies.
Originally posted by mancha:Sometime, when the cars are less packed, I will try walking down the train and feel the difference.
I thought it was some sort of vortex in the first car, as I did not feel the draft there as I can in other cars.
I shall now try the last car and see if there's any difference.
Thanks for the replies.
Going to the last cabin will not make much difference.
As sgbuses said "air flows through the gangway and door gaps", if air can't flow in, air can't flow out as first and last cabin are made exactly the same.
Would you believe it, but inertia also affects the air in a moving vehicle.
Yes, went to the last car today, no difference.
For air to flow in an enclosed space there must be an inlet and an outlet. I think in the first car, only the air con is blowing, and due to the crowd, the air there is musty. Air enters from the second car onwards and flows to the rear. The first car has the driver cabin panel that cause the vortex behind it and possibly raises the air pressure in that car. The higher air pressure plus the heat expelled by the crowd may be the cause of the stuffyness there.
My rides in trains are always in a packed situation. Air- con with good ventilation is a must.