Lola T-70 Mk III

[Scale-Master]

I machined tool to make controlling the parting line in the wheel molds easier. 

It locks into the back of the wheel center like the rear piece of the rims.

Clay is used to seal one side.

[Scale-Master]

Then I cast the side that contains the face of the wheel in RTV so that the seams are all on the inside of the wheel and quite minimal at that.

[Anglia105E]

You could apply for a patent on that tool, Mark....... ?

David

[Scale-Master]

Very doubtful David.  It only works on these wheels and it is just a means to an end to control a mold line.

[Mattilacken]

Nice work! You are for sure making som great progress, been following this on AF before. /Gveman

[Scale-Master]

Thanks Anton!

 

The half-shafts are done for now.  The yokes are cast resin (dyed black) copies of 3D parts.

The shafts are brass acid treated for the dark finish. 

Each U-joint has four bearings/caps (with E clips) and they work.  The half-shafts telescope too.

Edited February 2, 2020 by Scale-Master

[porschercr]

Just amazing!

[Scale-Master]

Thanks Trevor!

 

I was going to have to adjust the rotor hubs (or make shims) so I decided to mill a new one out of resin stock instead of editing the 3D file and growing a replacement.  This was quicker too.

[LaughingIndian]

 

Thanks for the posts and pics Mark. This is just wonderful ... although a sport I’ll never be able play ... but inspiring nonetheless.

Great great work!

[Rich Chernosky]

Mark..have been following this post from the beginning.  And I have seen a few of your other completed models.  Thank you so much for explaining in detail what you are doing. Now I know the method to your madness and appreciate your other models even more.  Can't wait to see it finished..it should be world class.  How long have you been 3D printing BTW.   Did you do some of this on your other models??

[Scale-Master]

Thanks Mike and Rich.

I only starting doing my own printing a couple months ago, before then I subbed out my files to a company called Fraxional for the actual printing. 

The first model I used 3D printed parts on was my Gulf Seven.  (Have been using the processes for my "real" work for years.)

I had the coil and ignition box grown. 

This one will have more 3D generated parts than any previous model of mine.  But most of the 3D parts are used as masters to cast resin copies.

[Bugatti Fan]

It is coming on well Mark!

[Scale-Master]

I designed and then grew the rotors several times over the course of a few months.  The detail I want is just not something my printer can do on both sides.  (One side is great.)  I redesigned them adding more material so I could post-machine  after growing them, but the material is too brittle when cured, and too soft and pliable before fully curing.  I was able to make them look really good after machining, but every one of them had micro fractures (or worse) that would show up under paint.

The good side of them:

The rough side of them before machining:

[Scale-Master]

So after way too much time and effort without acceptable results, I went back to my original plan to make the rotors before I got the 3D printer…  Good old machining.

First I milled in the rectangular vent holes around the perimeter.

Then I cross-drilled 60 holes in each side.

[porschercr]

Mark,

The rotors look great. I admire your patience drilling 60 holes each side.

Trevor

[Scale-Master]

Thanks Trevor. 

Those 60 holes I did today were a breeze compared to the rectangular vents I milled around the perimeter yesterday. 

[porschercr]

1 hour ago, Scale-Master said:

Thanks Trevor. 

Those 60 holes I did today were a breeze compared to the rectangular vents I milled around the perimeter yesterday. 

Your welcome. I'm sure that was no fun.

[Scale-Master]

It's all fun.  Why else do it?

[porschercr]

7 minutes ago, Scale-Master said:

It's all fun.  Why else do it?

?

[Scale-Master]

As satisfied I was at the time, the more I looked the more I thought I could do better…  So more time on the mill and now I think I have what I want.  These cross-drilled holes scale out to ¼ inch in diameter.

[Scale-Master]

I decided to go with my earlier rotor configuration; slotted and cross-drilled.

Raw rotor blanks cut from high-pressure cast blank aluminum composite material.

I milled the vents around the perimeter and faced them.

I cross-drilled and slotted them.  They are directional.

This is the natural cut finish of the material.

[Pete J.]

Mark, with your ventures into 3D printing, I am surprised you never converted you mill and lathe into computerised machines.  Neither CAM or 3d is perfect for every job, but they each do things better the other. 

I always seem to get more satisfaction when the chips are flying and makin a mess.  ?

[Scale-Master]

I'd have to either have my mill fully rebuilt or buy a new one to go CNC.  (New is the way I'd go.)

I'm with you Pete, I still like to drive it manually.

[Codi]

I'd still like to have the CAD skills you possess Mark.  It makes you the entire package when it comes to creating things.  Nice to always have that tool in the tool box even though you've not pulled it out just yet.   Been a while since I checked in on the project but I certainly wasn't disappointed.  Great work sir.  cheers, tim

[Scale-Master]

Thanks Tim!

 

One year "birthday" for this project.