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aerohead · 12-16-2015, 04:11 PM

Another consideration facing train designers is eardrum protection for the passengers as the non-pressurized cabin higher speed trains enter,or leave a tunnel.
So much can be done with the tunnel ends themselves,building like a muzzle brake,but long,organic shapes help with the pressure spikes.
Also,since the trains run 'forwards' and 'backwards',the 'nose' can make a fine boattail.
Japan's Shinkansen has experimented with nose/tail extensions up to 57-feet in length.
Air-brakes too!

12-16-2015, 04:11 PM	#1784 (permalink)
aerohead Master EcoModder Join Date: Jan 2008 Location: Sanger,Texas,U.S.A. Posts: 15,892 Thanks: 23,969 Thanked 7,221 Times in 4,648 Posts	trains Another consideration facing train designers is eardrum protection for the passengers as the non-pressurized cabin higher speed trains enter,or leave a tunnel. So much can be done with the tunnel ends themselves,building like a muzzle brake,but long,organic shapes help with the pressure spikes. Also,since the trains run 'forwards' and 'backwards',the 'nose' can make a fine boattail. Japan's Shinkansen has experimented with nose/tail extensions up to 57-feet in length. Air-brakes too! __________________ Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/