Big Boy

b101uk · Post by **b101uk** » Mon Jul 08, 2002 12:49 am

hi
RE: AI wheel slip, in the SERVICES file the .srv filers have setings for AI trafic, one of the setings is "MaxWheelAcceleration ( 0 )" by defualt this is set at "0" but you hand edit it to a small number as this slip is aplyed all the time, a number from "0.0001 to 0.005" is about right.

hear is a small fix for the head out veue, just paste it into it goes under the Friction values in BigBoyPart2.eng (no sounds).

Inside (
PassengerCabinFile ( BigBoyPart2.s )
PassengerCabinHeadPos ( 1.9 3.7 -5.8 )
RotationLimit ( 40 180 0 )
StartDirection ( 0 0 0 )
Sound ( "BBEng.sms" )
)

info on Sherman Hill

Sherman Hill EB 0.82% Tks 1&2 24 miles MP541-565 (other grades of this mag on U.P. main) WB 0.82% Tks 3&4 45 miles MP510-554 (other grades of this mag on U.P. main) between Cheyenne & Laramie, WY
EB 1.75% Trk 3 7 miles MP549-556 (reaches 1.92% for 1/4 mile) WB 1.55% Tks 1&2 20 miles MP516-536.

thanks for the info guys i will go and have a look

b101uk

1crick14a · Post by **1crick14a** » Mon Jul 08, 2002 7:25 am

Figures for original Tractive Effort :-
BIGBOY ORIGINAL 8 x 27.5 x 32 x 300 Divide 68 = 363000lbf 13671.1643KW
BIT HIGH I RECKON

HillFarmsLtd · Post by **HillFarmsLtd** » Mon Jul 08, 2002 10:24 am

bjdick wrote: Is this the answer to all probs?[/img]

Where did you get that yellow wagon?

Fodda · Post by **Fodda** » Mon Jul 08, 2002 10:55 am

LOL! That 'yellow wagon' is a new style engine with custom cabview (but aliased sounds unfortunately).

It's a light frame on bogies with an enormous jet engine strapped to it. Set derailments to off unless you want to fly off the tracks at the earliest opportunity.

It's available at the 'other place' of course, and is well worth having a go at.

bjdick · Post by **bjdick** » Mon Jul 08, 2002 2:25 pm

Good for the "Ski Jump" at the end of Albula line too!!!,or Sea View in 10 Mins.

b101uk · Post by **b101uk** » Mon Jul 08, 2002 5:08 pm

hi all

can any of you tell me how much mass(lb or kg) in there is at 0psi in 1ft3 of Steam,

or

how meny ft3 of Steam will 1ft3 of water make at at 0psi.

am i right in thinking that the ratio is 10:1, 1ft3 makes 10ft3 of Steam. in wich case 1ft3 of Steam would have a mass of 1lb?

thanks
b101uk

Deltic9000 · Post by **Deltic9000** » Mon Jul 08, 2002 6:26 pm

b101uk wrote:hi all

can any of you tell me how much mass(lb or kg) in there is at 0psi in 1ft3 of Steam,

or

how meny ft3 of Steam will 1ft3 of water make at at 0psi.

am i right in thinking that the ratio is 10:1, 1ft3 makes 10ft3 of Steam. in wich case 1ft3 of Steam would have a mass of 1lb?

thanks
b101uk

If I remember my O-level physics correctly, the expansion ratio of steam to water at atmospheric pressure is in fact...

1,640:1

which explains why boiler ruptures & explosions are so devastating.

(This is of course, volume rather than weight!)

1crick14a · Post by **1crick14a** » Mon Jul 08, 2002 6:50 pm

I think, not 100% sure but seem to remember that 1lb of coal could evaporate 7 to 8lbs of water............Rick

bjdick · Post by **bjdick** » Mon Jul 08, 2002 7:07 pm

Not forgetting at atmospheric pressure steam is at 14,57Lb\SqIn or ZeroLb\SqIn Guage.Makes a lot of difference when designing steam plant.
It was a simple forgetting of that fact that contributed to Apollo capsule fire.
It would be pressurised in space to atmospheric pressure in a vacuum outside(normal)Americans used pure oxygen then.Difference 14.57Lbs\sqin
By pressurising to the same pressure difference inside\outside whilst on ground under test conditions,internal pressure was in fact above 29lb\Sq in absolute,compared to vacuum.Thus the fire burned with an intensity not foretold by tests carried out for "Space" conditions.
PS to evaporate 1Kg water from0DegC to steam@100degC requires 2676KJ

b101uk · Post by **b101uk** » Mon Jul 08, 2002 7:40 pm

hi guys

thanks for the info

i did a little looking around and found out that

at 1psi 331.711422 ft3 of steam = 1LB

at 300psi 1.541364 ft3 of steam = 1LB

thanks

b101uk

scefhwil · Post by **scefhwil** » Mon Jul 08, 2002 9:48 pm

b101uk wrote:hi
RE: AI wheel slip, in the SERVICES file the .srv filers have setings for AI trafic, one of the setings is "MaxWheelAcceleration ( 0 )" by defualt this is set at "0" but you hand edit it to a small number as this slip is aplyed all the time, a number from "0.0001 to 0.005" is about right.

b101uk

Ahh! Not tried tweaking there before. Thanks b101uk will have a look.

By the way, ever got black smoke from an AI steam loco?

CaldRail · Post by **CaldRail** » Mon Jul 08, 2002 11:25 pm

Wow! Free with every copy of MSTS... A physics degree. But I am impressed, really.

microsoft · Post by **microsoft** » Tue Jul 09, 2002 10:44 pm

Dear friends

Has anyone sorted out this overblown piece of junk. Seriously, nice one Nalw. With just a few minor tweaks she can haul a 120 consist over Marias - both aways. I have now 4 Biggies- 4000, 4004, 4005 & 4014. Two can haul a 250. I dont know if anyone else has a bit of a problem at startoff. Sand - regulator 100%, then ease the reverser up slowly to start things movin. Once up to around 20-27mph, Set reverser at 33%. That gives max pulling power and max available top speed.

You can have a look at my BigBoys doin their stuff at

http://www.mstspics.2ya.com

Luv y'all

Strat

bjdick · Post by **bjdick** » Wed Jul 10, 2002 9:05 am

Don't want to be a party pooper,but you do realise "microsoft" is a registered trademark.
Big Bill and his henchmen are pretty zealous about protecting it too.You could find you're playing with your Big Boy in a court-room near you,if you don't change your "handle".
Surprised Matt hasn't picked up on this.

Fodda · Post by **Fodda** » Wed Jul 10, 2002 2:57 pm

I'm sure Bill and his boys have better things to do... and I think they'd ask him to 'cease and desist' before pulling out the expensive legal department.

About driving the BB straight out of the box... I'm used to steamers putting on 100% reverser and then opening the regulator enough to get started and then gently nudge up the reg and reduce the reverser sorta like 80% at 20mph 50 % at 30 25% under 50 and 15% over 50 with small adjustments to both to keep a constant speed.

Now I see people saying to start the BB they use 33% reverser and nudge up the reg till she moves... have I been getting it right?

Basically, how should I drive the gorgeous 70000 away from Carlisle station towards Appleby?

Atomic Systems

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