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Old 12-31-2019, 05:15 PM   #151
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Re: Lola T-70 Mk III

Thank you 360!

This is the inside of the valve cover master. While I designed it with mounting features they filled in when the part was grown. So I milled those features in by hand.
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Old 12-31-2019, 05:29 PM   #152
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Re: Lola T-70 Mk III

I wasn't satisfied with the last wheel I grew so I redesigned a few parts of it and made a new one. The front came out fine; it was the back side I didn't like.
It like the previous one required a good bit of post-machine work (it was designed to have that work done) and I think it is an improvement.

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Old 01-02-2020, 12:08 PM   #153
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Re: Lola T-70 Mk III

The valve cover pattern is done and ready to have a mold made from it.

Same for the calipers.
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Old 01-02-2020, 04:43 PM   #154
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Re: Lola T-70 Mk III

Nice you are building a nice kit here!
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Old 01-03-2020, 02:31 PM   #155
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Re: Lola T-70 Mk III

Thanks! Discarding a lot the "kit" aspect though...

Once in primer I still was not satisfied so I re-engineered the wheel to be three pieces instead of two.
This is the new spoke piece as it was grown.


And then machined.

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Old 01-03-2020, 03:57 PM   #156
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Re: Lola T-70 Mk III

This is the rear section of the new rim design; it still needs to be final machined.

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Old 01-03-2020, 06:38 PM   #157
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Re: Lola T-70 Mk III

The U.V. resin is very hard and brittle. That part did not survive the machining process.
I started growing a beefier part and realized I could probably machine one from scratch faster.
I was correct, made this from scratch and the printer is still running.

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Old 01-07-2020, 11:05 AM   #158
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Re: Lola T-70 Mk III

I grew a new alternator fan but the inside filled in, a common issue with this printer.

So I machined it out.
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Old 01-18-2020, 03:09 PM   #159
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Re: Lola T-70 Mk III

I had a bit of a setback when it turned out that the platinum based RTV I use primarily would not cure against the U.V. cured 3D resin from the printer. Even after using the sealing materials that worked as barriers in the past, the molds were not curing and worse than the time loss was it making gooey messes on my patterns. That took many hours over several days to clean up.
I invested in some tin based RTV and that seems to be the right stuff for this resin.
Here are the calipers and one pair of pads I'll use on the car.

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Old 01-21-2020, 10:59 AM   #160
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Re: Lola T-70 Mk III

These are the resin versions of the valve covers.

With an internal mounting system to hold and align the magnets to the ones in the heads.


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Old 01-22-2020, 11:57 AM   #161
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Re: Lola T-70 Mk III

I redesigned the rear wheel to be three pieces like the fronts and restyled the back of the spokes to match too. This is the raw 3D grown/printed master before machining.



And after…


(The black marks are index points for making the mold.)
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Old 01-23-2020, 09:47 AM   #162
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Re: Lola T-70 Mk III

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.
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Old 01-26-2020, 02:02 PM   #163
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Re: Lola T-70 Mk III

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.
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Old 02-01-2020, 07:21 PM   #164
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Re: Lola T-70 Mk III

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.


Last edited by Scale-Master; 02-02-2020 at 11:34 AM.
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Old 02-05-2020, 06:08 PM   #165
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Re: Lola T-70 Mk III

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.
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