Back to the Minnie

[krv3000]

oooooooo thats sexy

 

[don-tucker]

Thanks Bob but I don't think the Misses would call it sexy ;D
Don

 

[kustomkb]

Very cool, looks great!

 

[seagar]

Amazing !!!!! th_wav

Ian (seagar)

 

[don-tucker]

Thanks for your kind comments and thanks for looking
Don

 

[putputman]

Don, once you really understand the scale size of that engine, it is truly amazing work. Will follow this one to the finish.

 

[don-tucker]

Beginning to look a bit like a Traction engine now.

I'm getting all excited,some tricky bits comming up next,water pump,cylinder,brake gear.

 

[Henk]

Don,

Indeed looking very good.

Out of curiosity, what is the function of the eccentric thingy on the back wheel?

Regards,
Henk

 

[kvom]

Checking progress from the Istanbul airport lounge; looking real nice!

 

[don-tucker]

Don,

Indeed looking very good.

Out of curiosity, what is the function of the eccentric thingy on the back wheel?

Regards,
Henk

Hi ,the eccentric thingy is the wheel drive pin,just a round pin with a knob on it to engage drive,I think that is what you mean.
Don

 

[Jasonb]

Its comming along nicely, that pressure gauge is definately the right size, a 1" would have been too large. The cylinder is where the fun starts - so many holes - such small taps

Henk The hubs have the teardrop profile to avoid weakening them where the drive pins are inserted. Thes epins give the option of having an open or locked diff on engines equiped with a diff or in the minnies case you can drive just on erear wheel for manovering in tight spaces.

On the other side of the engine, inboard of the wheel is a "winding drum" this is a large pully that carried a steel cable for winching, again the pins are used to remove drive from the wheels and just have the axle turn the drum.

On a few of the larger engines such as Road Locos they had double pins and the hub was shaped accordingly as you can see from these castings

Jason

 

[don-tucker]

Checking progress from the Istanbul airport lounge; looking real nice!

Come on kvom get back in that workshop there is a paddle engine waiting for you ;D
Don
Jason.You answered that much better than I ,thanks
Don

 

[Henk]

Ah,

Got it now, thanks for explaining.

Henk

 

[don-tucker]

This is my setup for machining the cylinder saddle.I used a dti to centre the mandral then moved to the correct offset using the dro.setting the boring head to the correct radius before hand.

Please don't look to closely at my hi tec handle on the z axis,but it worked well so I shall make a nice permanent one later,I machined the rest of the cyl by mounting the mandral on an angle plate horizontaly.
Don

 

[don-tucker]

Here is the progress to date,I can see the end in sight but still a month or so yet.

I thought maybe someone might be intersted in my method of centering a centre pop in the lathe.
I held a piece of 5/16" silver steel or drill rod in the collet and turned a 60 deg point then turned 1/4" along the length from the point,faced and centered the other end,I just pop the pointed end in the centre pop on the job and a running centre exerting enough pressure to make the rod turn
then DTI the turned bit,works a treat.and cheapo.

Don

 

[Jasonb]

Its comming along well, you will have a busy month ahead :

Jason

 

[don-tucker]

Cheers Jason,I have been told that i am obsessed with it,so I have to take it easy.
Don

 

[don-tucker]

Ready for mounting on the boiler,
Don

 

[zeeprogrammer]

That is just beautiful Don. Really a piece of art. I just saw an earlier picture and the detail is just awesome. Just awesome.

 

[don-tucker]

Thanks Zee,you made my day,I didn't think anybody looks at my posts.
Don