Oshkosh Het M1070, M1000

[Car5858]

Well classes are out till June, the only problem was that my HD was approaited by one of the students. Luck would have it that I backed up the drive last week. No cad drawings were lost.

Anyway, my friend Tyler came through for me on the air bags.

Then I realized that I gave him the wrong measurement . So I had to do some modifications.

First the product supplied was what I asked for to within 0.004"

I took a trip to the local autozone, and was able to get an end section of hose material for the air bags. As I was compairing the assemblies with the 1:1 I noticed the slight bend in the bag assembly. I cut the new material a little long in case I need to shorten them later. Then I used a dremal fine burr to resize the inside. This worked out pretty good, as I was able to get the bend in the bag assembly.

Next I mounted the bag to the frame mount, and support arm. I used a 2-56 threaded rod and a nylock on the top. The bottom was secured by threading a bracket that is mounted to the support arm. The best part is that it gives me a way to adjust the height of the axle.

I am very happy with Tylers work, since I am a newbee. I can't understand why these bags are not on the other trucks on this great board.

Heres the pics

Had to add the referance pic

[Car5858]

I installed axle 3's suspension today.

[rockNmayhem]

Hey Carl those bags look right at home now on your project. Sorry you had to re make the bags themselves but they look great. Can't wait to see this chassis rollin.

[Car5858]

Originally Posted by rockNmayhem

Hey Carl those bags look right at home now on your project. Sorry you had to re make the bags themselves but they look great. Can't wait to see this chassis rollin.

Thanks for the hard work you put in I am one step closer in getting to that point.

Finished installing the rear drive suspension.

[rockNmayhem]

Carl that thing is going to be such a beast. What axles are you going to be running on it?

[Car5858]

Originally Posted by rockNmayhem

Carl that thing is going to be such a beast. What axles are you going to be running on it?

I am going to use some axles that I designed, the internals will from a tlt axle.
I will have to shorten the axle shafts, byt its the challange in it.

I will start making a pattern for casting the axle housings in the morning.

Still don't know what to do for the front leaf springs. I want to stay close to scale, but may have to compramize. If I could find some blued 1/4" annealed spring steel, I would make them myself.

I found some at McMaster Carr, that is 60$ I only need 32 inches worth.

So if ya know a supplier that will supply short lengths, I am all ears.

Took this beast up to the hospitle to show my Dad, he was impressed. (first time in 53 years)

Now he wants out so he can turn the rims.

[glorydays24]

Fist of all let me just say your wood models are OFF THE CHAIN!!!
And this Oshkosh is going to be one amazing ride...
Just like the real thing, only smaller

Big John

[Car5858]

Thanks, to bad I never kept one of the wooden ones for myself. Maybe the next one, but the RC bug has bitten again and it may be a while.

[Car5858]

Made the axle master patterns today. Wood sealed with thin CA, sanded and recoated 3 times.

[Hos1880]

Carl,

I have been reading thru your thread and it is awesome, this truck is on my list of trucks to build once i get two others finished. What thickness aluminum are you using for your suspension brackets. I hope when I get the M26 done to start on one of these thank you for sharing.

Merritt

[Car5858]

Merritt, the brackets and frame rails are 1/16" thick. Basiclly standard extruded alumnium cut to shape and finished with a file.

I am still learning about how to build them. So far so good, changed my mind about casting the axle housings(it would cost more that the truck itself).

So now I am awaiting some flat stock alumnium. These axles are designed to use Tamiya's diff setup.

Thanks for looking.
Carl

[doodlebug]

Hey Carl have you thought about casting them yourself? http://www.lindsaybks.com/dgjp/djgbk/char/index.html
Later, Neil#2 aka doodlebug.

[9W Monighan]

Originally Posted by Car5858

Made some progress this afternoon, made the axle supports, changed the design a bit so I can mount the shocks inside the frame like the 1:1. I have the front support side frames started but not finished (need to bend them).

Its amazing what you can do with a bandsaw, drill press, and a set of good files.
here is the axle support.

That IS some nice hand work. I like it.
On your solid modeling; Is that done with Autocad or Solid Works? I hope I can do that kind of drawing someday.

[Car5858]

Originally Posted by doodlebug

Hey Carl have you thought about casting them yourself? http://www.lindsaybks.com/dgjp/djgbk/char/index.html
Later, Neil#2 aka doodlebug.

Thanks Neil I will look into that.

Originally Posted by 9W Monighan

That IS some nice hand work. I like it.
On your solid modeling; Is that done with Autocad or Solid Works? I hope I can do that kind of drawing someday.

Steve, I did solid the modeling with AutoCad 2009. First make an orthographic drawing of the part you want to model. Copy that drawing and start a new acad3d drawing, then paste the copied drawing into the new. This way you have all the elements in the proper view. Then you can use the extrude, press pull, subtract combine and 3d rotate commands to finish your shape.

You can get fancy by adding surface textures and rendering to get jpegs like I have posted.

Then use stlout on the command line to create an stl file for export to bobcad or othere gcode generator program that you have.

As for solidworks, I am not that proficent at it so far. (still Learning)

[Car5858]

Originally Posted by oztruck

Here in Australia we sometimes get large boxes that have "Blue/Black metal packing tape around them. the metal tape is app 1/2" wide and it comes in different thickness. It is great for scale leaf springs after it has been cut down to size.

Thanks OZ

I thought about that also, just haven't located some. I will have to look in the scrap bin when I pick up my order from AAA supply.

[doodlebug]

Try your local lumber yard or plumbing supply house for banding, look around construction jobsites. The stuff is always laying around.
Later, Neil#2 aka doodlebug

[Car5858]

Thanks Neil I will give that a try.

[Car5858]

Thanks for looking and helping out so far. My materials order came in and I will be able to make some progress now. I hope to start on the front spring assembly soon thanks to Steve for helping on that score.

[Car5858]

Made some progress slow going, took two days to make this one, 3 more to make. Still have to resize one axle shaft, thinking about that one.

[edwalsh18]

Originally Posted by Car5858

Made some progress slow going, took two days to make this one, 3 more to make. Still have to resize one axle shaft, thinking about that one.

..... speechless!

that is amazing work. what tools were used to make that? and what is the overall length?