Island Modelworks SW1001s

[victor miranda]

thanks UP1950s

now I understand Ed's sill concern

yup  I think that shell on my chassis will look 'sprung'

back to the drawing board....

I am going to add a pair of flyheels to see how it runs.

victor

[Ed Kapuscinski]

I don't think we're comepletely out of luck.

There's a bit of meat to the sills there on the locomotive that can probably be removed. I think this approach is sound, just that the board + sill combo needs to lose a little height.

[victor miranda]

Hi Ed

ugh....  ahem
umm grab a pair of ll sw trucks and set your shell on them

and then look at the photo of the chassis I made.

that PCB is 1mm thick

and more of a problem for this particular chassis
the hole for the motor is about 9.5mm across....

after I add the flywheels
I'll try another Idea....

tell me how deep the slot is from the side sills

I want to know If I can get the entire motor up in there with the PCB
I think I need 14.5mm
14mm may be enough

victor

[Iain]

Thin the edges of the PCB and the inner edges of the sill at opposing angles, the same concept used in lapstraking a boat.

As for the motor, what is it?

[victor miranda]

Hi Iain,

I think your idea is good and I think it may well be what we try.

the problem is that I think the end point will
exceed the thickness of both sills ?

the motor is from the Kato 4 wheel trolley.
Kato part 11-103 is what I recall.
It is a pretty robust motor. 
it is a good size for smaller n-scale projects
there are darned few good motors in this size.
and it has 5 poles  which helps.
the bad side is that as 5 poles go, it is oddly lumpy.
It cogs at the slowest of speeds, so a flywheel is desirable.
It starts reliably and does run slowly after about 20 hours of operation.

victor

[daniel_leavitt2000]

The wide bolster on the Life-Like truck is exactly the reason why my attempt failed. There are other alternatives:
1. Atlas Korea VO1000 offset gearbox AAR trucks (a bad idea because there is a lot of friction due to the non-needlepoint bearings)
2. Atlas China VO1000 offset gearbox aar trucks (needlepoint wheels, but the gearing is still funky and the gearbox may not fit on the cab end of an SW switcher)
3. Kato/Con-Cor=China SW1200 trucks should fit alright but no needlepoint bearings
4. Con-Cor Areo Train uses EMD 2 axle flexcoil trucks up front which might be a possibility

[up1950s]

Rich, did you get my PM over on Atlas?

Reply sent

[Iain]

Hi Iain,

I think your idea is good and I think it may well be what we try.

the problem is that I think the end point will
exceed the thickness of both sills ?

the motor is from the Kato 4 wheel trolley.
Kato part 11-103 is what I recall.
It is a pretty robust motor. 
it is a good size for smaller n-scale projects
there are darned few good motors in this size.
and it has 5 poles  which helps.
the bad side is that as 5 poles go, it is oddly lumpy.
It cogs at the slowest of speeds, so a flywheel is desirable.
It starts reliably and does run slowly after about 20 hours of operation.

victor

Chop the ends of the PCB off flush with the end sills so that it buts against them; no support of the shell is provided here, but the vertical overlap will keep the mechanism from sliding fore and aft.

[kiwi_al]

Victor,
The picture below shows a IM SW1001 with a styrene template that I'm going to use to cut out the single sided PCB. It should fit inside the cab and long hood. Then I'll mimick Lifelikes design with the wipers. not sure how it all will go.

Anyway it's just another way of looking at it.



sorry about the fuzz I should paint the template

[victor miranda]

Hi kiwi_al,

the photo is good enough that I know what you are doing.

it is a good idea.

victor

 

[victor miranda]

a little more progress.


This is pretty much what I had in mind when I started.
It is not well built in that some care is required to get it back together
and it seems to act a little different this time.
I have it doing laps.  It is going at about 40 - 50 smph using 135 ma and 6 volts
I think the trucks should be freed up.  another day.
I am pretty sure this attempt will not be servicable
so I am going to try another time  except for the trucks, I think I have enough parts to make another

and...
for daniel_leavitt2000


the bottom. I flipped one truck out so you can see how I constructed it

[Chris333]

Victor, did you re-gear the trucks at all?

[victor miranda]

Hi chris,

no... re-gearing that truck is not at all easy.
the problem is that there are not good ways to add and subtract
gear pairs.

the drivers can go up a tooth or two....
but the gear driving it is already 12 tooth and taking it to 11
well.. I do not know where to get 11 teeth gears.
the worm gear is the obvious place to re-gear...
and it has to fit in the truck hole of 8mm

If I could think up a good way to mount a finer pitch worm gear
I think that is the best bet.

my count is that the LL truck is 26 to 1
so it is not too bad as it is.

victor

[Chris333]

I was just curious. I know you did Atlas GP trucks.

I wonder how long it will be before will can order from NWSL again.

[victor miranda]

hey ed!

so let  me know...
did the chassis fit?
are the motors narrow enough?

does the second frame ride in the correct place?
share some info so as I'll know what to try next...

victor