Author Topic: Centurion Tank  (Read 9230 times)

milenio3

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Re: Centurion Tank
« Reply #33 on: June 25, 2013, 03:23:23 PM »
I've always found a review on video of a model kit to add lots of "pizzazz" to the kit.

And yours is not the exception. Fully explained on the tracks, for which I always wondered.
- Gerardo
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Dave Winfield

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Re: Centurion Tank
« Reply #34 on: July 07, 2013, 10:06:03 AM »
Its been a while, so I think an update is in order.
(I'll try to do more video updates when there is more to report)

Finally got the Main Drive housings sorted out...wasn't as straight forward as I had imagined...
and I am currently finishing up the Main drive Gears.
Only two Drive Gears (right and left) but each of those have two toothed Gears.
So a bunch more discs and rings to layer and cut out...combined with all the disc, strips and rings
that make up all the Drive Wheels!



Anyone who has built a Tank model, knows that there is a tedious part to the build
when you have to deal with Drive Wheels and the Tracks.
It often involves a LOT of repetitive cutting of discs, rings and wheel parts and small Track link parts.

I haven't gone back to the track work yet...I'm still stuck on the drive Wheels and such!

Phew!...its exhausting.  I find I do a little bit each night. Maybe an hour, maybe 2 or 3.
But I have decided not to complicate things...
I will finish up all these Wheels before moving on to the Tracks or anything else.

DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

Dave Winfield

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Re: Centurion Tank
« Reply #35 on: July 08, 2013, 09:28:35 AM »
Got the Main Drive Units installed last night.
Had to tweak the length of the Hub centers a little (in each Drive Gear).
Still sorting out the actual Gear thicknesses and tooth spacing
...and the file still needs a couple of minor adjustments.
It will be easier at this point to adjust the Track design
(since I have not done any more work on the Track parts as of yet.)




Kind of jumpin' the gun here...but I was curious about how things looked!
Keep in mind...other side only has two Road Wheels in place, no Axle caps,
and missing one front Return Roller.
There are also no Treads on any of the Road Wheels.
(Treads are gonna take me another week to do!)

Its getting harder to photograph! Its so big!





DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

milenio3

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Re: Centurion Tank
« Reply #36 on: July 09, 2013, 11:14:24 AM »
I knew there were rivets in this model! There they are!

Looking good!
- Gerardo
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Dave Winfield

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Re: Centurion Tank
« Reply #37 on: July 09, 2013, 11:32:16 AM »
haha
no, no rivets.

there are a lot of bolts...especially on the wheel parts.
And I am including all the little bolt heads and nuts as extra layer parts.
I'm just too lazy to put them on myself.


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Dave Winfield

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Re: Centurion Tank
« Reply #38 on: July 19, 2013, 12:03:23 AM »
I have been trying to finish up the suspension/wheels/drive/etc
for a few days now.
Last thing to do is to create all the larger Road Wheels.
Like these...



Unfortunately what is shown in that photo are two early attempts at the tire design.
(The double wheel rim itself is fine...no problems there.)

The issue has always been getting the two tire treads, in a easy to build form.
that fit the rim properly, with as few parts as possible, etc etc

There are 12 of these double wheels in total
...so that means 24 tires, each with multiple parts (external and internal)!!

I have been cutting strips and rings,
and tabbed strips and more rings
and rings an rings and...

my eyes are seeing rings and holes and discs
and my fingers ache from all that cutting
and I've gone through about 20 knife blades...



and I finally gave up and tossed it all in the trashcan
and started again!
lol

The tabbed strips made attaching the side rings easier in one way
and harder in another way...but most of all, they were just too
frustrating to cut out and deal with.
The next problem was trying to introduce the slight angle to the
side walls of the tires....I just couldn't get the tires to stay consistent
in size and fit onto the rims properly.

Anyway...too many problems to list...

I eventually tossed it aside for a simpler design that is only three parts
for each tire...(four if you include the extra inner straight strip that
beefs up the tread part). And I settled on a flat, straight sided tire wall.

And I created a simple "jig" that is printed and mounted onto thicker card.
The assembled "tread" ring is mounted on the jig...this locks the assembly
into a perfect circle...and then a bead of glue around the edge, and attach a sidewall ring.
Once it dries enough, pop it off the jig and glue the other sidewall into place.

Then just slip two tires onto the double rim!
Problems solved!



I should have all the Road Wheels done in the next couple of days
and then I can finally focus on the Track design.

Two members have already helped me out with Track Link ideas...
not sure if its what I want yet, but they are definitely giving me ideas.
So, I am looking forward to finishing up this section of the design.
DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

Dave Winfield

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Re: Centurion Tank
« Reply #39 on: July 19, 2013, 11:43:57 PM »
I must admit, I got a bit excited tonight!
To finally see the Centurion in this state...



Some of the Road Wheels are not permanently glued yet.
I'll finish that up this weekend.

And, I am now anxious to sort out some Tracks!
(but, I have a B-24 Liberator kit to finish first)

DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

Vermin King

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Re: Centurion Tank
« Reply #40 on: July 20, 2013, 10:21:39 AM »
Very nice progress.  I'm somewhat in awe watching this go together.  Very good technique on the build as you are developing the model.  AND at a very good rate of speed considering the quality of the build and that you are designing as you go along. 

I do have a question.  On the upper rank of wheels, at the front and rear, there is only one wheel instead of two at each of the corners.  Why would they design it this way?  I am almost totally ignorant on tank design, and this question may show my ignorance in all its glory, but my curiosity level is pretty high.
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Dave Winfield

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Re: Centurion Tank
« Reply #41 on: July 20, 2013, 10:45:01 AM »
Yes, those front and rear "Idlers" have single "wheels"
as opposed to the main "Return Rollers" that have two, rubber wrapped wheels.

I don't know why either.
I probably know as much as you about Tanks! lol

My guess...?
Could be a lack of space.
But if I had to guess, I would say the system was designed with the four main
Return Rollers to support the Track, and then the single front and rear idlers
were added just as additional support in those areas where there is a lengthy support gap
and where the Track flexes the most (as a result of forward/reverse driving torque).

I passed this question along to my expert friend Col...now you got me wondering.

DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

Dave Winfield

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Re: Centurion Tank
« Reply #42 on: July 29, 2013, 09:14:56 AM »
Centurion latest update...

still working away on the Tank.
I finished all the Wheels and Track drive components.
And I think I have the Tracks sorted out!

I will be creating and posting a new Video update real soon!
Got a nifty new HD Camcorder.
So watch for that.

A while back, when I first started talking about a Track and Link design, I got some
great input from members...including two Track Link design ideas from two members
in particular (Thorsten and Michal).
Before I say any more, I'd like to say thanks guys!...you gave me some usable ideas.

Michal and Thorst had similar ideas, using a rolled part, creating a hinged Track Link.
They even provided me with 3D mockups of their designs.


I can't believe how good these designs look!
But unfortunately I still have some small issues with different aspects of the designs, like;
- too many small parts to cut out
- too many holes to cut out
- very small and narrow areas that might not survive cutting and handling
and, the idea of using a wire hinge pin.

Plus...the Tread is still too small and will still require more parts added on.

I liked my idea of all paper strip Track, with a folding seam hinge, etc
But I just couldn't get the weight and thickness I wanted, without adding
multiple layered parts...too many layers.

So, I kept going back to Michal's and Thorst's designs and eventually gave in
to the small part size...but I simplified the overall design to reduce the holes
and the narrow areas.  I also reduced the number of connecting links (3+2)
instead of (4+5).

The entire Link is only 4 parts (one of those parts just a simple layer addition).
But it uses the rolled and layer technique for the hinge parts.



The Track Links still require a "pin" (which is the part I don't like)
and I have used 1.5mm Florist Wire.
Its a green coated wire used by Florists to support Flower arrangements.
Its pretty common in Craft stores and Florists.
Its the thinnest thing I could find that was easy to cut and available to most.
Wooden dowels would require at least 2.5mm, making the part to big.

I'm still looking for a way to cut the wire lengths smoother and cleaner
and not sure about how to "lock" the pins in place.










Based on the dimensions of the Track Links, I am estimating somewhere close to 100 Links
for each Track. So...about 200 Links, each with 4 parts and a hinge pin...should take about
six months to assemble. No problem. Shoot me now.






DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

milenio3

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Re: Centurion Tank
« Reply #43 on: July 29, 2013, 12:59:27 PM »
The tracks can be a Paper Model on their own!!
- Gerardo
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