My version of the De Haas Chicopee

[JScott]

Highpower, you are so right.  I took a job here in Louisiana as an engineering manager and my hobby time went bye-bye.  This year is shaping up much better though.  But over the last two years my projects have suffered.  Also, lost all my shop space in the move which is a major setback.

Regarding finishing a project like this, in his book Frank De Haas described the way to approach it.  He said to make a model in wood first.  If you can't finish the wooden version it will be a huge undertaking to do one in metal for real.  I'm taking his advice although I did buy the lathe and milling machine just in case.  I had always wanted a metal lathe and a guy was selling a nearly complete shop for 30¢ on the dollar so I jumped on it.

I'll work on the garage this weekend and start roughing out the pieces on the bench top band saw.  More pics to follow!

JScott

[Highpower]

[mnovinger]

I'm building the same rifle using 4140. There are measurements for the hinge pin and for the hammer pivot pin. My parts are cut out and I'm fitting them now. I had a full sized pattern glued to the breach blocks and noticed my holes were lower than those shown on the pattern. I followed the measurements and now I will be changing the sizes and shapes of other parts to make those misplaced holes work. Making a wooden prototype is a good idea. Wish I had done so also.

[JScott]

I found quite a few dimensions that were "off" when I did the CAD drawing and I adjusted them as necessary to make it all fit and work.  AutoCAD has a great feature where you can group several lines together and then make them into what is called a block.  All the major components in my drawing are blocks such as the hammer, trigger, breech lock, etc.  As I built the model in the drawing I put each of the components in a separate part of the drawing as a stand alone detail.  Then when I edited a specific item as a block the changes were automatically updated on the detailed component.  Once I had everything working on the assembly drawing all I had to do was dimension the detail pieces.

I have attached two drawings; one without the dimensions and one with dimensions.  I know that I have over dimensioned the individual pieces but I will go back and clean things up after I build the wooden model and find out what is critical and what is not.

Looking forward to seeing some pics of your build soon!

JScott


  Chicopee CF Rev F-Model2.pdf (Size: 357.26 KB / Downloads: 67)


  Chicopee CF Rev F-Model.pdf (Size: 437.91 KB / Downloads: 60)

[mnovinger]

Wish I'd had those dimensions a month ago.  The receiver sides are not cut to shape yet.  The support shoulders have been welded to the receiver sides.

[JScott]

Sorry I was late with this information.  The drawing is not 100% complete as I have not checked it or built the wooden version.  Dimensionally all the parts and pieces "should" work and potentially with less hand fitting than the ones drawn in the book by Frank de Haas.

When can we see some pictures of your Chicopee?  Please start a new thread on it so we can get a look at your progress.

Thanks,
JScott

[B. Reynolds]

Great drawings. They should make it easier for future Chicopee builders.
I just finished my second rifle. The first one in 221 Remington fireball was finished 10 years ago.
My new one finished almost 10 years to the day from the first, it's in 17 Rem fireball. These are real accurate
rifles, consistent 1/2" groups from each.
In case you are curious, the innards of the actions are made from O-1 tool steel and the breech block as
well as the receiver sides is from 4140 steel. The only parts that are heat treated are the hammer and the trigger.
I made the receiver sides from a solid piece and did the radius on the rotary table so it matched the breech block
halves perfectly.

B.Rerynolds