Big Boy

[1crick14a]

Supergoods, Bigboy was designed I think anyway, to be run on auto fireman, that way they were able to get rid of safety valves, the outlet is still there, on manual its under the boiler just rear of second set of cylinders, it appers as a gland blow, what I did was resplace position of the valves use the exhaust from the second engine as cylinder blows.
Replaced water values I can now run it nicely on manual, turning I think, what was the a Berkley Stoker on when I want.
To come to water levels its what it say's water is always level in a boiler
you really have to know the grades going down a bank you must make sure you have enough water covering firebox crown with Bigboy extra care is needed because of the boiler length........Hope all this helps....Oh
by the way wheres Cutback Yard.................Rick

[bjdick]

There seems to be a thread underway other place,as to why BB can pull a consist,of correct weight,already attatched in editors,from a standing start,no problems.But when SAME consist is coupled on,as in an activity,it won't move!
Noted your lucid comments above,just get me a loco that'll pull me through Cutbank as original does.
I think this is only start of BB redesign.

[lwaxl00]

I'm pretty certain they had mechanical stokers, the grate area is something like a 150 sq ft, you'd have to be superman to get a shovelful to the back of the fire.

Those leaking steam effects really look good

Alan

[esswe]

There seems to be a thread underway other place,as to why BB can pull a consist,of correct weight,already attatched in editors,from a standing start,no problems.But when SAME consist is coupled on,as in an activity,it won't move!
Noted your lucid comments above,just get me a loco that'll pull me through Cutbank as original does.
I think this is only start of BB redesign.

Seems like the fellow who had the problem hasn't installed the MSTS patch. Probably has nothing to do with BigBoy....

[bjdick]

Wrong.Not to do with coupling patch,to do with maxtrainairbrakepressure,upped to 90 from 45,problem solved.
Seems with readymade consists,airpipes are ready charged.Uncoupled consists MT,and require min 50 to release brakes.

[bjdick]

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

[supergoods]

Thanks Rick,

I don't think I had the crown uncovered as, after the first time I was overusing the injectors and was priming at 75% until I opened the cylinder cocks which brought priming down to 45%. Perhaps the water in the boiler is surging and needs some baffle plates to cope with some of the sudden track irregualities on the Marias Pass.

Maybe I'll try on the S & C where the gradient is a little better engineered

Why didn't ALCO take up the Beyer Garratt license they held, then they could have had the same power out of a shorter fatter boiler?

[bjdick]

The boiler and its specific steam output was designed around the firebox,which was in turn designed for only one grade of coal.Semi-bituminous from S.Wyoming.Nothing like conventional "Steam" coal.
IE custom built for fuel and load to be pulled.

[1crick14a]

Check out Cylinder Diameters reckon there wrong they got them at 27.75
I think they should be 23.75.........Rick

[saddletank]

Ouch - is there anything they got RIGHT?

How is the loco faring on the other site? Is it's performance being questioned there? (sorry life is too short to read 2 sets of forums)

[scefhwil]

with the mass i used the drivers on both player and AI parts will slip at almost the same time the efect is you get more TE and speed for longer b4 sliping and you dont have to use the sily MaxPower seting thay used.

b101uk

Has anyone ever seen an AI wheelslip in the sim? Getting the wheels to rotate at the correct speed is hard enough!

So unless these chaps have broken new ground in configuring MSTS then the AI bit will never wheel slip because AI's don't have engine physics in the sim.

[b101uk]

corect size Cylinder are

CylinderStroke ( 32.0in )
CylinderDiameter ( 25.75in )
CylinderVolume ( "19.2704*(ft^3)" )

the Volume 19.2704*(ft^3)" is for 2 Cylinders not the full 4 Cylinders.

RE:"Has anyone ever seen an AI wheelslip in the sim? Getting the wheels to rotate at the correct speed is hard enough!

So unless these chaps have broken new ground in configuring MSTS then the AI bit will never wheel slip because AI's don't have engine physics in the sim."


? wot an odd statment yes i have seen AI wheelslip in the sim, and yes AI's do use physics in the sim.

[bjdick]

According to official BB site,Cyl Dia is 23.75"\Stroke 32"
Swept volume should be 16.41 CuFt
Why have you increased number of wheels from 8 to 12?

[1crick14a]

biggerbigboy 4 25.75 32 300 68 159135 5993.2803
If it had 25.75 cylinders the tractive effort at 85% boiler pressure would be
159135lbf it's kw rating at that would be 5993.2803kw this has been worked out on an excel data base which has always been correct against official figures.............Rick

PS the only way a true indication of what this was capable of is when someone produce's the route it ran and worked over.

[ymee]

Yeh what a loco, been waitin for this, BUT! i just cant get into Train-sim.com to get the sound fix file.can anyone send it to me or is it too big,please, tried her on Kicking Horse pass with 50 grain wags. but stalled!! yes stalled. ok, thaks ,gonna have a run now B4 work aghhhhhhhhhhhh. cyah ,Ymee