From: lfsheldon@gmail.com

On 9/4/2016 21:39, Robert Heller wrote:
> At Sun, 4 Sep 2016 21:02:48 -0500 Larry Sheldon  wrote:
>
>>
>> On 9/4/2016 15:09, Adam H. Kerman wrote:
>>
>>> Even in interurban days, we've read that CNS&M RR, which did operate at
>>> grade through suburban territory, lost plenty of motors during winters
>>> with heavy snowfall.
>>>
>>> Motors need to be cooled. They need air intake. They need to be in a place
>>> under the railcar where they can provide traction. It's just the nature.
>>
>> Don't diesel engines have the same problem?
>
> Actually no.  The air intake (for the prime mover) is near the top, *except*
> for "Tunnel Motors" -- "Tunnel Motors" are diesel engines specificly designed
> for long and poorly ventelated tunnels.  "Normal" engines would such diesel
> exhaust into the air intake and stall.  Opps.

I was thinking only of the traction motors.
>
> I think a diesel loco might have more under carriage clearance (larger
wheels)
> AND are equiped with snow plows (so there is going to be less snow under the
> train). This probably means that they would not have the same traction motor
> issues as would a EMU (powered) transit car (which has no plow, smaller
> wheels, less ground clearance).
>
>
>>
>>> Anyway, CTA spec'ed how the motors were ventilated. It wasn't the
>>> manufacturer's problem.
>>
>> I think the manufacturer has a moral responsibility to say "We are NOT
>> going to put our name on a defective design like that."
>


--
quis custodiet ipsos custodes?
-- Juvenal

--- SoupGate/W32 v1.03
 * Origin: LiveWire BBS -=*=- UseNet FTN Gateway (1:2320/1)