I have a technical question about Back to The Future which contains many spoilers

(31 Posts)
Hassled Sun 06-Mar-16 19:33:59

So - at the end of BTTF2, 1955, the DeLorean is caught in a lightning storm and goes to 1885. Marty (in 1955) finds where the Doc has left it (in 1885) and goes to rescue the Doc.

BUT that DeLorean is the DeLorean that features at the end of BTTF1, as in it has Mr Fusion power, you can use bananas/food waste to power it and it flies. The 1885 DeLorean is that one, not the original 1985 one.

So why then do they need to fanny around with a steam train to get it up to 88 miles an hour to get back to the future in 1885? Why don't they use waste food to power the flux capacitor?

LetThereBeCupcakes Sun 06-Mar-16 19:51:36

Maybe they didn't have any bananas? I expect they were quite pricey in 1885. Steam trains were everywhere?

Disclaimer - I haven't seen it on about 20 years so I have no idea! Might have to watch it again now...

Hassled Sun 06-Mar-16 20:11:12

No sorry - bananas weren't essential to the flux capacitor. Could have been any foodstuff. This is going to keep me awake tonight, I can tell.

ImMeMe Sun 06-Mar-16 20:13:50

Because the flux capacitor won't work until the car gets to 88mph

SwearyInn Sun 06-Mar-16 20:17:35

I think the bananas/food thing cam from the future - does Doc not go off to 2015 and then come back (with news about Marty's kids). And it is in 2015 he has discovered green rather than nuclear energy??

I'm not 100% sure though......

SwearyInn Sun 06-Mar-16 20:18:18

Oh god ignore that I see you are taking about no2 which I've never seen.

NotDavidTennant Sun 06-Mar-16 20:19:22

If you start analysing Back To The Future for plot holes you'll never stop...

SellMySoulForSomeSleep Sun 06-Mar-16 20:20:02

Aww I'm sad. You are right. It's one of my favourite film and it now makes no sense. sad

PandasRock Sun 06-Mar-16 20:22:53

It's a looong time since I've seen any of them, but don't they try experimenting with different foodstuffs in Part 111, and end up blowing something up (some kind of Wild West whisky springs to mind, but I could be losing the plot grin wink), meaning the flux capacitor no longer works and cannot be repaired at that point in time?

BumpAndGrind Sun 06-Mar-16 20:23:06

I believe back to the future wiki has a delorean timeline.

I think at one point there is something like 4 of them.

BumpAndGrind Sun 06-Mar-16 20:24:06

backtothefuture.wikia.com/wiki/Four_DeLoreans

Hassled Sun 06-Mar-16 20:25:02

I thought the food power thing meant you didn't need to get to 88 mph. Maybe you need both food power AND 88 mph. Maybe the food just replaces petrol? The end of BTTF1 is ambiguous - I'm so distracted by the "where we're going, we don't need roads" line that I don't know if they still have to acquire speed.

HermioneWeasley Sun 06-Mar-16 20:25:07

It's the 88mph thing in part III isn't it - not the need for fuel? The delorean is broken so they have to push it to 88mph

HermioneWeasley Sun 06-Mar-16 20:26:24

In part I the whole point is it needs plutonium, hence Doc stealing it from terrorists. Then they use the lightning bolt to give it thr equivalent, but it can get up to 88mph by itself.

It's possible I've watched this too many times

Trills Sun 06-Mar-16 20:26:29

I think the time travel power (1.21 gigawatts?) is separate to the "moving at 88 mph" power.

Design flaw, really.

ImMeMe Sun 06-Mar-16 20:28:21

In 1 the flux capacitor is powered by plutonium. Hence the need for 1.21 gig of electricity to power the flux capacitor. One plutonium pellet, one trip.

In the future Doc gets a Mr Fusion fitted which powers the time circuits/flux capacitor. They still need to get to 88 before the flux capacitor will work.

Hassled Sun 06-Mar-16 20:28:26

Oh sweet lord that 4 DeLoreans link shock. My head will melt.

Hassled Sun 06-Mar-16 20:29:19

Ah so the food waste is the substitute Plutonium/lightning?

PandasRock Sun 06-Mar-16 20:30:14

Yep, and since they've blown up the MrFusion, they can't get to 88.

So they hijack the train, of course.

Hassled Sun 06-Mar-16 20:31:31

I was being pretty damn thick here, really, wasn't I?

rightguard Sun 06-Mar-16 20:32:02

The doc says that Mr fusion powers the flux capacitor but they need gasoline to run the engine (when marty arrives in 1885 he's attacked by Indians who shoot the gas tank and it leaks all over the ground) and as there are no gas stations in1885 they fanny about with the steam train.

BoGrainger Sun 06-Mar-16 20:34:37

Oh god, my favourite films, and now you've got me at it. What made the Delorean fly? I might have to read wiki

Trills Sun 06-Mar-16 20:36:23

I don't think we KNEW what made it fly, did we?

Hassled Sun 06-Mar-16 20:38:39

They're fannying about with the steam engine right now on ITV2.

ImMeMe Sun 06-Mar-16 20:39:51

The Doc had a hover conversion some time in the future

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