Rons' Mastiff

[ozzie46]

Sorry I haven't been as active as I should have been for a while. Maye this will make up for it a little bit.

  I started making this in the summer of last year.  I made the crankcase from 4 pieces of aluminum.
 I got the idea from a post by "nemt" on HMEM.



  I used J-B weld to glue it together along with the screws.

 


  The heads are 2 piece to make the water passages as this is a water cooled engine. They will be glued together also. They still have to be profiled to the cyl contours yet.

   

  I was sweating bullets about making the crankshaft but it wasn't all that bad! I used some hot rolled steel and left it about .030 oversize and rested it for a few days before I finished it to size. I still have to thread both ends yet but it is true.



  This is the top of the crankcase. The hole is to put the oil in and the raised pad is for mounting the carb or carbs as you can use 2 if you want.

 

  This is the bottom of the oil pan or sump if you will.  Sorry about the bad pic.

   

This part goes between the oil pan and the crankcase and has the engine mounting pads on it. How ever I goofed up and machined the mounting pads up side down. The will still work but it's not plan.

  More to come.

  Ron

[steamer]

Looks great Ron!  Thanks for sharing that!
Keep it coming!

Dave

[Jo]

Looks good Ron. Looking forward to seeing some more 

Jo

[ozzie46]

  The camshaft was harder to make than I thought it would be. It is made from a central stainless steel 1/4 in shaft and the lobes are made and then glued on with locktite . I will post more on this later when I take pics of the tooling to make it.

   

   The rods and the wrist pins. As the wrist pins are floating they are drilled 3/32 for aluminum or some other kind of pin with a head that won't score the cyls.

 


   The cyls have wet sleeves and were lapped using the tool that Len Mason described in his article on building the Mastiff.  Ramon has shown the tool in his thread on lapping. The pistons were lapped to fit the cyls also.  I made the rings and heat treated them too.
 That was an interesting project in itself.

   


    This is the timing gear housing for the front of the engine.

 

   Here's the gears. I would like to take the opportunity to thank everyone who offered advice on gear cutting when for it a while back. It came in very handy and after I just got brave enough to do it I was surprised by how relatively easy it was. I cut them on a rotary table after practicing an some aluminum blanks first.

   These are the practice ones.
 

   The real ones.

 


   And a family portrait so far.

   

    Ron
   
   

[ozzie46]

 

  Thanks Dave. Thanks Jo.
   I will post some more after I take a few more pics.  Might be a day or few though

  Ron

[b.lindsey]

You've done a lot of work there Ron, and it looks very good.  Will look forward to more pictures and even more progress in the days ahead.

Bill

[ozzie46]

   Thanks Bill. This is my first IC engine and I will be happy if it runs even poorly.

 Ron

[Don1966]

Just finished reading your post Ron, you have some great looking parts. I will be following along with interest.

Don

[ths]

Hi Ron,

Things are looking really good. Is this the mastiff engine designed by L C Mason?

Cheers, Hugh.

[ozzie46]

  Thanks Don, I'll try to keep it interesting.


   Thanks for looking in Hugh. Yes,that's the one.

  Ron

[vcutajar]

Fantastic parts Ron.

   This is my first IC engine and I will be happy if it runs even poorly.

I know the feeling.

Vince

[Jo]

Agreed.. Sometimes even a pop would be nice   

Jo

[ozzie46]

thanks Vince,
  Jo I have been following your Double Tandem saga and am patiently awaiting the successful ending.

[ozzie46]

Some more of the Mastiff.

 These are the combined intake/exhaust manifolds. I still have to drill the exhaust port holes yet.



 The oil dipstick and housing.It will be bolted to the side of the crankcase.
Some more of the Mastiff.

 These are the combined intake/exhaust manifolds. I still have to drill the exhaust port holes yet.



 The oil dipstick and housing.It will be bolted to the side of the crankcase.

 


  A posed shot of the complete setup for turning.

 

    The fixture will hold material for 2 lobes to be turned at a time.
 One side of the plate is for intake and the other side is used for exhaust.

 After the lobes are turned they cut in two with a thin slitting saw and finished machined and hardened as they are made out of drill rod/silver steel.

  Now the fixture for assembling the cam lobes onto the 1/4in stainless steel rod to make up the cam.

 

 

  A posed shot of the setup.

 The cam lobes are lined up with the appropriate marks and lock tited on.

 


  That's it for now, hope you enjoy it.

  Ron
 

 
 

 

  A posed shot of the setup.

 The cam lobes are lined up with the appropriate marks and lock tited on.

 


  That's it for now, hope you enjoy it.

  Ron

[arnoldb]

  I was wondering what you were up to Ron.  Looks great so far, and there's a lot of work in the parts 

Kind regards, Arnold