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Blog Entry# 1813544
Posted: Apr 21 2016 (13:57)

9 Responses
Last Response: Apr 22 2016 (23:38)
2 Followers
General Travel
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8

★
Apr 21 2016 (13:57)   CRJ/Chittaranjan (3 PFs)
 
guest   6387 blog posts
Entry# 1813544            Tags   Past Edits
#railwayengineering
**** Please Share Views on the Following Technical Changes I think on the 3-Phase Loco of Indian Railways *****
WAP-7(NOW)
Gear Ratio: 72:20
Power output Maximum: 6,350 hp
Continuous:...
more...
6,000 hp
WAP-5(NOW)
Gear Ratio 67:35:17 (3-stage gears)
59:35:19 for loco 30086
Power Output : Max:6,000 hp (4,474 kW)
Continuous:5,440 hp (4,057 kW)
WAG-9(NOW)
Gear Ratio 77:15 / 64:18 / 107:21
Power output 6,350 hp (4,735 kW)
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------- ------------------
WAP-7 Enhancement ( I think)
Gear Ratio: 80 : 18
Power Output: Maximum: 6,500 hp
Continuous: 6,150 hp
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------
WAP-5 Enhancement (I think)
Gear Ratio : 60:35: 18 (3 Stage gear)
Power Output : Max:6,300 hp
Continuous:5,500 hp
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------
WAG-9 Enhancement(I think)
Gear Ratio: 80:15/64:18/109:20
Power output 6,500 hp
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------- --------------------
Kindly comment IN DETAIL FROM EVERY ASPECT what Impact will be created on the "Performance of the Three Locomotives" regarding the above mentioned enhancements I think for the Three Three-Phase Locomotives of Indian Railway.(WAP-5/WAP-7/WAG-9)
Also comment on the scope if WAP-7 can be made 3-Stage Gear like WAP-5
For existing records please refer the following:
click here
click here
click here
I am not an engineer. These are the Figures I think from my Imagination to make all the three Locomotives more speedy but don't know whether the proposed figures will serve the purpose or not. Please share views .
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4 Posts
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2

Apr 21 2016 (15:53)
TheMadrasMail~
TheMadrasMail~   6349 blog posts
Re# 1813544-5              
Many routes on SER and a few corridors are capable of handling 25t axle loads. In practice though, maximum axle load run by IR is 22.82t (CC + 8+2T) and 22.3t on some coal freights. The upcoming DFCs will support axle loads upto 30T.
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Apr 21 2016 (17:13)
TheMadrasMail~
TheMadrasMail~   6349 blog posts
Re# 1813544-6              
Converting WAP7 to a 3 stage gear system is not necessary. The 3 stage gear system in WAP5 is not for higher speed. It is required in the WAP5, because the P5 has bogie mounted traction motors. What this means is that when there are irregularities in the track, the wheels' axle and the motor's axle can be come misaligned. To counter this, the P5 has a 3 stage gear box in which the middle gear is flexible and it ensures that the gears are still aligned even if the wheel's become misaligned.
The P7 has a axle hung TM, which means that the motor's axle and the wheels' axles are always perfectly aligned. Thus a 2 stage...
more...
gear system is good enough.
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Apr 22 2016 (21:33)
indian railways   7174 blog posts
Re# 1813544-7              
Change the names :P
wap5 -> wap7
wap6 -> wap5
wap7 -> wap6
lol :P
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3

Apr 22 2016 (22:01)
indian railways   7174 blog posts
Re# 1813544-8              
All these changes (gear ratio, horsepower) are not needed. Rather than playing around with the existing locos, it makes more sense to develop new locos (preferably, own locos)! :)
--------
Passenger loco
Wheel configuration : Bo-Bo
Power...
more...
: 8600 HP/6400 kW
Speed : 220 km/h (minimum)
Weight : around 84 tonnes
Axle load : around 21 tonnes
--------
Freight loco
Wheel configuration : Co-Co or 2x Bo-Bo
Power : 9000 HP -12000 HP
Speed : 120-140 km/h (common all over the world)
Weight : 132 tonnes or 2x 88 tonnes
Axle load : 22 tonnes
---------
No freight design loco for passenger from hereon :P
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Apr 22 2016 (23:38)
guest   6387 blog posts
Re# 1813544-9              
Understood BOSS ....
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