The FEF-3 is actually programmed to break if it reaches above 140 MPH. For it to have broken mid-race means that for some time it exceeded 140 MPH, quite impressive for such a big old steamer.

Some things I would like to mention is that the 844 does actually have a higher top speed on level track. Something did happen with 844 in this video, but I’m not asking for a rematch. 844 also had to slow down much sooner because it weighs more than double the Mallard, Mallard being 104 tons and 844 being 223 tons. I’m just happy this race happened even if my all time fav engine lost the race.

Basic engine physics:

Mallard: we’re in the lead!

6:13

That just goes to show you, never underestimate the americans

The 844 had the vtec kicking in 🤣

When the 844 was smoking badly the problem was that the pistons burst so that's why it was smoking badly

DAYLIGHT V.S. FLYING SCOTSMAN!!! the most famous American steam engine v.s. the most famous British steam engine!!!

8:14

The 844 takes longer to speed up and slow down because of how much heavier it is. This test also shows that the 844 is capable of higher speeds than mallard is, but since it was designed to withstand a max speed of 120mph it cannot run at those speeds safely.

Next race should be 844 and Daylight together vs Big Boy and Challenger together!

844 would've won if she didn't slow down, she has over twice Mallard's horsepower and tractive effort, as for in real life top speeds the Union Pacific never recorded it so it remains unknown, the FEFs were built to handle to 120 mph so that's a rough estimate. Also, I can say for certain that she didn't break.

Shame train simulator doesn't have Class J #611, as she was the pinnacle of American steam technology and was designed to achieve speeds similar to Mallard.

IT FINALLY HAPPENED!!!!! I’ve asked this for over a year now!! THANKS SO MUCH LAZER!!!

844 is a FEF 3 class 4-8-4 and it still operates today! It was built on December 24th 1944.

Mallard in British accent: Wow! You're bloody bigger than me, but can you keep up with me? 844 in American accent: I can totally keep up with you. I've never retired, never will and I'll prove to you that we American steam locomotives are just as fast as you British engines! In the beginning

FIANLLY! I BEEN WAITING FOR THIS FOREVER!!!!!!!!!!!!!!!!

Mallard may be the fastest steam locomotive in the world, but our *44 has got something Mallard doesn't. Style and beauty ^^ Not to say Mallard's not a good looking engine, she is, but 844's is a sigh to behold as well ^^

I mainly was the first one to ask for it on the laser JET live stream birthday one and thank you for this race LASER JET