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Forum: Basic questions and answers 09-21-2018, 07:49 PM
Replies: 11
Views: 456
Posted By crystallographic
Hi Jay, Flame-cut and welded makes for good...

Hi Jay,
Flame-cut and welded makes for good strong frames.


This is a prototype of ours:
48827


And this is our large design, being made at Columbia Helicopters, now.
Forum: Basic questions and answers 09-20-2018, 12:13 PM
Replies: 11
Views: 456
Posted By crystallographic
Shapes to practice

Hi Jay,
Having an assortment of geometries to practice is helpful:
48803
3003, .040 and .050, half hard or fully annealed

These were created by Howard Booster, a student of mine, in an effort...
Forum: Basic questions and answers 09-19-2018, 05:13 PM
Replies: 11
Views: 456
Posted By crystallographic
Hi Jay, Make sure your upper and lower rolls...

Hi Jay,
Make sure your upper and lower rolls are aligned:
48784
Not leaving tracks like this.


48785
But nice even tracks like this.
Forum: Basic questions and answers 09-19-2018, 04:24 PM
Replies: 8
Views: 288
Posted By crystallographic
The C4R is probably the best-looking of the...

The C4R is probably the best-looking of the Cunningham series of race cars. Looks like an accurate buck, to me.

One of the most functionally-designed race cars ever made, in my opinion. All...
Forum: Individual Classifieds 09-19-2018, 12:04 PM
Replies: 1
Views: 243
Posted By crystallographic
If that will cut .032 then it is a good machine...

If that will cut .032 then it is a good machine for the $$.
I suspect it is a 16ga machine, mild steel.

If it has the olde manual back gage then even better.
:)
Forum: Automotive Projects 09-14-2018, 03:43 PM
Replies: 187
Views: 69,736
Posted By crystallographic
Sweet results. Heard of a factory 327Chev...

Sweet results.
Heard of a factory 327Chev having two intake gaskets on one side, but never heard of two on both sides....
Some squishy gaskets work real good ....

Sorely missing the chat, the...
Forum: Introductions 09-13-2018, 01:20 PM
Replies: 7
Views: 302
Posted By crystallographic
Hey Rob, Welcome to the metal gang. Carpentry...

Hey Rob,
Welcome to the metal gang.
Carpentry ... rusty Brit stuff ... 16 ga anvil ... ratty old Bean shirt ...
yep, you fit right in.
Forum: General Discussion 09-12-2018, 11:48 AM
Replies: 8
Views: 342
Posted By crystallographic
Right on, Robert. When I finally got onto them...

Right on, Robert.
When I finally got onto them I was deeply appreciative.
And the Trizact.
And the cubic zirc/ceram combo - those can also cut!
(For my experience, from 1970, 3M = Minn. Mining...
Forum: General Discussion 09-12-2018, 11:39 AM
Replies: 101
Views: 48,942
Posted By crystallographic
Alfa 2900B "Corto"

Nice resto.
And best congratulations on taking Peb'l.


I've seen that car in old photos many times. Always wondered when it would make it onto the Peb'l reviewing stand.

Same with the...
Forum: Introductions 09-11-2018, 12:21 PM
Replies: 5
Views: 213
Posted By crystallographic
Hi Keye, Welcome to the metal gang. Got a few...

Hi Keye,
Welcome to the metal gang.
Got a few aeroplane guys here.
Forum: General Discussion 09-11-2018, 12:09 PM
Replies: 7
Views: 511
Posted By crystallographic
Hi Jon, Using hot gas on hot sheet (plastics...

Hi Jon,
Using hot gas on hot sheet (plastics like Lexan or Lucite, and some aluminum) cause shapes to be formed, like blowing bubbles or blowing glass.


I was just making observations on the...
Forum: Beginner Projects 09-10-2018, 02:15 PM
Replies: 18
Views: 1,111
Posted By crystallographic
Yep Cliff, funny thing about filler rod...

Yep Cliff,

funny thing about filler rod developed specifically for butt welding - it has some metallurgical science behind it. Although, if you watch "World's Fastest Indian" you can see that...
Forum: General Discussion 09-10-2018, 01:51 PM
Replies: 7
Views: 511
Posted By crystallographic
Hi Jon, The article you reference sure looks to...

Hi Jon,
The article you reference sure looks to me like the "all-aluminum" model specifically requested by Larry Ellison -
https://jalopnik.com/5385797/how-to-build-an-all-billet-aluminum-cobra
...
Forum: General Discussion 09-09-2018, 12:18 PM
Replies: 7
Views: 511
Posted By crystallographic
Fore-runner of the stretch press. yes, there...

Fore-runner of the stretch press.
yes, there are shops using them today.
Forum: Beginner Projects 09-08-2018, 06:02 PM
Replies: 18
Views: 1,111
Posted By crystallographic
Corking good process, Cliff. If those...

Corking good process, Cliff.
If those production numbers were low, then some shop guys likely bunged them out in some fashion, as you have done so well with your recipe.
Good cookin'!


Another...
Forum: Software for Metalshaping 09-08-2018, 01:07 PM
Replies: 1
Views: 368
Posted By crystallographic
Hmmm - "fold" vs "bend" ... some semantic detail...

Hmmm - "fold" vs "bend" ... some semantic detail involved here.

Seeing the cylindrical shapes resolve back and forth indicates to me that some added programming feature would be required to help...
Forum: Basic questions and answers 09-07-2018, 12:20 PM
Replies: 12
Views: 1,157
Posted By crystallographic
Some typos are way more serious ... :rolleyes:

Some typos are way more serious ... :rolleyes:
Forum: Introductions 09-07-2018, 12:18 PM
Replies: 3
Views: 172
Posted By crystallographic
Welcome to the metal gang, Mac. "Materials" is...

Welcome to the metal gang, Mac.
"Materials" is one great field of study.
Got "Unobtanium"? Atomic symbol, Un.
Or "phenomenol"?
:)
Forum: General Discussion 09-05-2018, 06:59 PM
Replies: 21
Views: 1,032
Posted By crystallographic
powder coat metal quality

Hi Bill,
I don't like powder coat for any metal less than .063 - too much variation from the heat cycles.
I do use epoxy filler and sand that. And the coater can apply a primer that can be sanded,...
Forum: Basic questions and answers 09-05-2018, 11:57 AM
Replies: 3
Views: 487
Posted By crystallographic
Hi Tom, Lowest heat for shrinking sheet of...

Hi Tom,
Lowest heat for shrinking sheet of thickness <.063, that I have successfully tested for, is no color but when the sheet has swelled to its max.
You can see the various heat colors -I hope -...
Forum: General Discussion 09-03-2018, 02:16 PM
Replies: 21
Views: 1,032
Posted By crystallographic
48636 Bodyshop guys use slow reducer to...

48636
Bodyshop guys use slow reducer to highlight the surface before primer.
Or this stuff.
Once you make the surface smooth enough that you cannot work it smoother, then you change to metal...
Forum: Basic questions and answers 09-03-2018, 01:43 PM
Replies: 3
Views: 487
Posted By crystallographic
I'd say that you ignore the gun and apply the...

I'd say that you ignore the gun and apply the warm with your air-propain flame until the metal is blue/purple - about the minimum heat for this, assuming your metal is steel.
When hot then pat down...
Forum: Basic questions and answers 09-01-2018, 04:14 PM
Replies: 6
Views: 515
Posted By crystallographic
Hi Mucci, You get the symmetry and contour by...

Hi Mucci,
You get the symmetry and contour by accurate and methodical shaping.
Then you can lose that by planishing.
Then you fight a bit to get symmetry, contours, and surface back and all good...
Forum: Announcements 09-01-2018, 03:42 PM
Replies: 27
Views: 1,380
Posted By crystallographic
rare excellence

Will,
I have met very few people who could tackle those race machine problems with the results you have gotten. I intend to follow Kevin Costner's tin cup example and spend more time at the Waffle...
Forum: Basic questions and answers 08-31-2018, 05:28 PM
Replies: 2
Views: 336
Posted By crystallographic
Corrections IN CAPS below, as I see the issue: ...

Corrections IN CAPS below, as I see the issue:





:):)
Showing results 1 to 25 of 1942

 
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