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Another new Accucraft 7/8" scale

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#21 ·
I'll be an odd duck (as usual) and suggest that it might have good bashing potential for 1:20.3 as well. The larger drivers and boiler might be good for a 3' gauge loco. Since the gauge is still 45mm, I'm guessing that the drivers, frame, cylinders, and even boiler should be reusable as-is, with little more than new tanks (or tender) and a cab needed to change the scale.
 
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#22 ·
Quary Hunslet
Accucraft UK
Live Steam 0-4-0ST in 7/8ths Scale
$1,395 USD

Image


Specifications:
Scale: 22.5mm to 1 foot (1:13.7)Gauge: 45mm or 32mmLength: 320mmWidth: 120mmHeight: 180mmBoiler: Centre FlueWorking Pressure: 60psiWeight: TBAMinimum Radius: 760mm (2 feet 6 inches)Reversing Gear: Piston type, reverse by lever in the cabValve Gear: Simulated Stephenson’s linkFuel: Butane GasBoiler Fittings: Safety valve, pressure gauge, water level check valveCab Controls: Steam regulator, gas regulator, reverse lever, lubricator under floor drain valve, under floor water level check valve[/list]Colours available, subject to production batch:
S78-1A Quarry Hunslet 0-4-0ST in Red
S78-1B Quarry Hunslet 0-4-0ST in Black
 
#23 ·
Posted By Chris Scott on 25 Jul 2012 07:16 AM

Quary Hunslet
Accucraft UK
Live Steam 0-4-0ST in 7/8ths Scale
$1,395 USD

Image


Specifications:
Scale: 22.5mm to 1 foot (1:13.7)Gauge: 45mm or 32mmLength: 320mmWidth: 120mmHeight: 180mmBoiler: Centre FlueWorking Pressure: 60psiWeight: TBAMinimum Radius: 760mm (2 feet 6 inches)Reversing Gear: Piston type, reverse by lever in the cabValve Gear: Simulated Stephenson’s linkFuel: Butane GasBoiler Fittings: Safety valve, pressure gauge, water level check valveCab Controls: Steam regulator, gas regulator, reverse lever, lubricator under floor drain valve, under floor water level check valve[/list]Colours available, subject to production batch:
S78-1A Quarry Hunslet 0-4-0ST in Red
S78-1B Quarry Hunslet 0-4-0ST in Black



WOW, that 7/8 stuff looks really big!
 
#24 ·
Posted By seadawg on 25 Jul 2012 07:20 AM
WOW, that 7/8 stuff looks really big!


Well, doesn't that mean it's 7/8 of the real thing.
So the real one is only just a little larger than the one in the photo!
All the best,
David Leech, Delta, Canada
 
#25 ·
Posted By David Leech on 25 Jul 2012 09:17 AM
Posted By seadawg on 25 Jul 2012 07:20 AM
WOW, that 7/8 stuff looks really big!


Well, doesn't that mean it's 7/8 of the real thing.
So the real one is only just a little larger than the one in the photo!
All the best,
David Leech, Delta, Canada


Hee hee hee... yeah!

I know you know better, David, but it points out one of my pet peeves... not only can nobody really agree on what "G" scale is (especially small vendors and advertisers!), no one can really agree on the nomenclature of how to specify or designate a scale.

Old timers (and those that learned from them) often use just one number and imply in their usage that the number is the number of inches (or fractions thereof) per foot of the real thing (so 7/8 means 7/8's inch per foot), which is a scale of 1:13.7 (approx.) and some people would refer to it that way, and others would specify it as 1/13.7 (note the slash instead of a colon).

I ALWAYS have to stop and think about the "real" scale when I see something specified as a single number leaving the "Per something" to the imagination. Often the only clue is if they include a unit of measure with the number... thus "7/8 scale" is just a wee bit smaller than the real thing, but "7/8-s inch scale" is 1/13.7 of the length and 1/13.7 of the width and 1/13.7 of the height of the real thing, which is 1/2579th of the real thing.

I also think it is really weird when the number specified is in a Metric unit, but the other number is in English units... like "78mm scale", which means 78mm per foot, which others would list as 3 inch scale and others would say 1/4 scale or 1:4 scale. It so much seems like fruit salad (i.e.: apples and oranges).

And note that scale is always specified in linear measurements (length or width or height) not in volume measurements, thus a 1:2 scale ("6-inch scale") model is 1/8 the volume of the prototype.

And per the subject of this thread, a 7/8" scale is pretty big compared to the other "G" guage stuff, being a model of an prototype that ran on 2-ft gauge track... but a 7/8 scale would be much too large to fit in most gardens or on G-gauge track, unless the original gauge was 2-inches!
 
#26 ·
And note that scale is always specified in linear measurements (length or width or height) not in volume measurements, thus a 1:2 scale ("6-inch scale") model is 1/8 the volume of the prototype.

That's accurate enough, but why bother to mention it. Linear scale is what you need in order to build a model, while the volumetric ratio is pretty much immaterial unless you need to know the volume of a container - and I submit that if you need the volume for some practical purpose, you're probably not as interested in scale modeling as in making something do a job. Also, most people find it a lot easier to calculate a square or cube of some number, rather than a square or cube root!
 
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#27 ·
Posted By DKRickman on 26 Jul 2012 04:49 AM
And note that scale is always specified in linear measurements (length or width or height) not in volume measurements, thus a 1:2 scale ("6-inch scale") model is 1/8 the volume of the prototype.

That's accurate enough, but why bother to mention it. Linear scale is what you need in order to build a model, while the volumetric ratio is pretty much immaterial unless you need to know the volume of a container - and I submit that if you need the volume for some practical purpose, you're probably not as interested in scale modeling as in making something do a job. Also, most people find it a lot easier to calculate a square or cube of some number, rather than a square or cube root!

I, and I know others do too, perceive Volume more than Linear dimension. This is why the difference between 1:32 and 1:29 is so glaring to me and others. There may only be a 10-percent difference in the linear dimension, but it is a 30 percent difference in volume.

I attend a Thresher's reunion every year and there is a fellow that has a 1/2 scale (his nomenclature) Case Traction Engine as well as the prototype it is a model of. In my view the model appears a lot smaller than just 1:2 scale. It is very definately much smaller... being only 1/8th the volume.

Granted, when designing/building a model you are working in linear dimensions and so that is all you are concerned with, but the result still "LOOKS" smaller than the stated scale.
 
#28 ·
Oh, and one more note to keep in mind... the specified scale is not used to calculate the difference in weight. A 1:20.3 scale locomotive is not 1/20.3 of the weight of the prototype, nor will it have 1/20.3 of the tractive effort. An exact model would be 1/8365.427 of the weight and that number would have to be taken into account to calculate the tractive effort, but the tractive effort would probably never even be 1/8365.427 of the protytype, because the physical properties of the materials do not necessarily scale in either linear or volumetric ways. Temperature and pressure do not scale at all. (A prototype steam locomotive that had a 180 pound boiler pressure would not work all that well at either 1/20.3 or 1/8365.327 of it [8.9 lbs or 0.02 lbs, respectively]!)
 
#29 ·
Well I guess this throws a wrench in the other 7/8 engine they are working on with me. I expect to see a prototype in about 2 months on the Baldwin 0-4-2 that David Fletecher pointed out in the above link. That engine WILL have Full Stevenson valve gear along with a sightglass and handpump. The high level of detail though along with the valve gear we are still looking at a 2k price point. Though Accucraft still has not released any drawings or renderings on their website yet.

Seems Emma was kept a secret, though I had been asked about bringing out a basic engine in 7/8 and said it would not be wise to flood the market with more than whats already planned, The 0-4-2 along with the Hunslet. Only so many of us and only so much money to go around. I know I have to pick and choose what I can get. Maybe I should rephrase that, what Im allowed to get. Hah

I am on vacation so cant post the color drawing of the loco, though it has been shown here on MLS a few times. Currently I have 17 orders for the Baldwin, if anyone else is interested they can contact me offline.
 
#32 ·
Posted By Kovacjr on 26 Jul 2012 07:38 AM
[...]
I am on vacation so cant post the color drawing of the loco, though it has been shown here on MLS a few times. Currently I have 17 orders for the Baldwin, if anyone else is interested they can contact me offline.
Jay, I can do this for you, enjoy your holidays. The Baldwin looks absolutely splendid! Best wishes from Tokyo, Zubi
 
Discussion starter · #34 ·
I really like the looks of the Baldwin 0-4-2! Even cheapskates like I might (that is to say WILL) be sorely tempted! I think it could be bashed easily into a 7/8" scale Maine Forney!
 
#36 ·
Posted By Phippsburg Eric on 31 Jul 2012 09:51 AM
I really like the looks of the Baldwin 0-4-2! Even cheapskates like I might (that is to say WILL) be sorely tempted! I think it could be bashed easily into a 7/8" scale Maine Forney!
That's pretty much what Edaville did in 12-inch-to-the-foot scale with their no. 5, better known today as the WW&F no. 10.
 
#39 ·
Hi Kovacjr and David Fletcher:


Will there be a Fairymead version, unlettered in electric, with an optional pilot deck and cowcatcher accessory available to model a loco similar in appearance to the Chloe ?

Will there be a Fairymead version, unlettered in electric with a flat panel roof available to model a loco similar in appearance to the Chloe ?


Suggestions for Fairymead rolling stock:

I guess the USA Trains overton coaches are far too small for this 7/8 scale loco?

Will there be an Accucraft "overton" combine or coach similar in appearance to the Delton short 7 window coach or combine or the USA Trains overton combine or coach in 7/8 scale?

Will there be an open horse drawn trolley car, similar to that used on the Grizzly Flats RR, available in 7/8 scale for this loco to pull?


Thank you,

Norman
 
#40 ·
The engine is live steam only.

Only one version will be produced no changes or additions.

As far as cars for the loco, Steve King has a kit available for the orignal cane cars. It was not a passenger line until its current status as a tourist railroad. 78railways.com You need to contace him thoug as they are not on his website yet.

Pricing is still open but should still be around the 2K price point.

As to preorders, being this is a loco that has not been advertised yet, all preorders have been from local steamups.
 
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