How to make the train go forward and take damage in Snowplow

Info From Wiki.

Hope this helps

             Melee Weapons  
Name                              Damage    
                         Point Blank    Critical  

Bat                      24-46,          105  
Sandman                  24-46,          105  
(Baseball)               15,              45  
Shovel                   43-87,          195  
Equalizer                   See Note Below   
Fire axe                 43-87,          195  
Axtinguisher             23-43,          195  
Homewrecker              42-55,          146  
Bottle                   43-87,          195  
Pain train               59-72,          195  
Eyelander                43-87,          195  
Scotsman's skullcutter   78,             234  
Fists                    43-87,          195  
K.G.B.                   43-87,          195   
Wrench                   43-87,          195  
Bonesaw                  43-87,          195  
Übersaw                  43-87,          195  
Kukri                    43-87,          195  
Tribalman's shiv         38-47,          127  
Knife                    28-54,          120  

Note on Equalizer: The damage done scales inversely with health. Approximately 113.7 − 0.405x, where x is the amount of health the player currently has, with a minimum of 33 when the player is at or above 200 health, and a maximum of 113 (before random damage and Critical hits). It should also be noted the Equalizer is the weakest melee weapon when Soldier has max health, and the strongest next to Spy's Backstab when Soldier is low.

For the Range of the weapons, I couldn't find weapon-specific range, the same Wiki states:

The Eyelander's melee range is approximately 37% more than the Bottle and other melee weapons. The same is true for the Scotsman's skullcutter.

It depends.

I have just learned about this line in the December 20th, 2007 patch changelog:

• The Medic's Medi Gun now charges at an increased rate during Setup time, to remove the need for self-damage grinding

So no, damaging yourself during setup doesn't help your medic charge faster. Additionally, damaging yourself at any one time doesn't help your medic charge faster if he's using the Quickfix.

It seems obvious but worth of noting, however, that this doesn't apply on maps that lack a setup time in the first place. You do want to do "self-damage grinding" on 5CP and CTF maps, and perhaps every other single time you get out of spawn with a medic — if you've seen the pros do it, that's why.

Even in these situations, be aware that not all self-damage methods are equally helpful in making your medic heal faster. You don't have to have a flashing red HP counter to do this; the ubercharge rate reduction kicks in at 142.5% health (except during setup, apparently) and you can be overhealed up to 150%. Here's what it means:

Class      Health at 100%     142.5%   150% (fully overhealed)

Heavy                300      427      450
Soldier              200      285      300
Pyro & Demo          175      249      260
Medic                150      213      225
All other classes    125      178      185

Ubercharge buildup   100%     100%      50%

So...

• The Gloves of Running Urgently don't damage you quite enough to keep you out of the 142.5% range. To get any advantage from that you'd have to bear with the heavy spamming 'meeediiic' until he drops below overheal, and then reap the fruits in one long shot.
• One rocket jump, dealing between 27 and 46 damage, drops you between 273 and 254 — barely enough to get you and keep you below 285.
• Detonator jumps are surprisingly much more effective, dealing 39–68 damage to a class that needs only 11 short of full to charge the medic faster.
• That's still nothing compared to the demoman's Sticky Launcher, however: with self damage ranging between 45 and 114, you actually need to be careful about not suiciding yourself.
• The scout's Boston Basher is also effective, as it is able to deal more damage faster than the regular medigun can heal. Again, make sure you don't kill yourself in the process.

Finally, the buildup rate penalty caused from your patient being healed from more than one source (medic, dispenser, cart) also applies in warmup, so be careful about that. Move away from that dispenser and overheal somebody who isn't already getting all the love.