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Re: 91110 gets a new livery.
Posted: 03 Jun 2012 16:02
by Chris
Yes, it was set going down Stoke Bank.
Re: 91110 gets a new livery.
Posted: 11 Jun 2012 14:30
by audigex
So it was essentially falling down a hill, then?
Re: 91110 gets a new livery.
Posted: 14 Jun 2012 11:04
by Dave
I'm pretty sure if you run down a hill you'll go quicker than if you use gravity to get down it haha.
Re: 91110 gets a new livery.
Posted: 14 Jun 2012 21:13
by teccuk
Dave W wrote:I'm pretty sure if you run down a hill you'll go quicker than if you use gravity to get down it haha.
That's a point
Does stick on vynal count as livery? It'l peel within a few months.
Re: 91110 gets a new livery.
Posted: 14 Jun 2012 21:25
by Geo Ghost
teccuk wrote:Does stick on vynal count as livery? It'l peel within a few months.
I wouldn't count on that

There's a numbers liveries now are done like that now. Holds up pretty well.
audigex wrote:So it was essentially falling down a hill, then?
Pretty much. But there was nothing in the rule book saying neither Mallard or 91110 couldn't set a record going down hill so it's our rules, our locos, we win

Re: 91110 gets a new livery.
Posted: 14 Jun 2012 21:37
by Pilot
Hmmmmm, What's the Terminal Velocity of a Class 91 I wonder

Re: 91110 gets a new livery.
Posted: 14 Jun 2012 21:44
by 61653
Geo Ghost wrote:teccuk wrote:Does stick on vynal count as livery? It'l peel within a few months.
I wouldn't count on that

There's a numbers liveries now are done like that now. Holds up pretty well.
audigex wrote:So it was essentially falling down a hill, then?
Pretty much. But there was nothing in the rule book saying neither Mallard or 91110 couldn't set a record going down hill so it's our rules, our locos, we win

Likewise City of Truro...
Re: 91110 gets a new livery.
Posted: 14 Jun 2012 22:05
by Geo Ghost
A321Pilot wrote:Hmmmmm, What's the Terminal Velocity of a Class 91 I wonder

Why am I instantly imagining a Top Gear style show for trains and railways...
I'm not sure if such a thing would be exciting or down-right scary.
Re: 91110 gets a new livery.
Posted: 14 Jun 2012 23:07
by Comm Cody
V_t= Square Root of 2mg Divided by pAC_d
V_t = terminal velocity,
m = mass of the falling object,
g = acceleration due to gravity,
C_d = drag coefficient,
p = density of the fluid through which the object is falling, and
A = projected area of the object.
Find the Appropriate numbers and solve.
Anyway on the subject of 91110, I wish America had trains like this.
Re: 91110 gets a new livery.
Posted: 15 Jun 2012 01:38
by 61653
A321Pilot wrote:Hmmmmm, What's the Terminal Velocity of a Class 91 I wonder

Normal or blunt-end first?
(though based on the actual physics provided by Comm Cody, whichever end is heaviest of course).
Re: 91110 gets a new livery.
Posted: 15 Jun 2012 05:26
by Pilot
Geo Ghost wrote:A321Pilot wrote:Hmmmmm, What's the Terminal Velocity of a Class 91 I wonder

Why am I instantly imagining a Top Gear style show for trains and railways...
I'm not sure if such a thing would be exciting or down-right scary.
I was thinking, put the Loco in a C-17, and release it at say 40,000ft. Drop it out the Back, and see what speed it does! Of Course, a strong Parachute should be deployed at say 5,000 ft

I have some Crazy Ideas.
Also, there is no Denying it'd be scary, a 100 ton Loco falling from 40,000ft with only a bit of Nylon to slow it as it got lower, yeah, pretty Scary
@Comm Cody: I might try to work it out now!
@47434: I imagine the Sloped end would provide less Air Resistance, and It'd probably end up tumbling anyway
