New lu mi num

[removed]

very old Lu-mi-num

 

[filmonger]

From The Wheel 1896

 

[SKPC]

That is one stiff drive-side chain-stay! Very, very cool old frame design. Question. Does cast aluminum deteriorate or weaken over time stress or no stress?

 

[Mercian]

Hi SKPC,

Yes, time and temperature, and the fact that Aluminium casting processes were not that advanced (this really was a wonder material of the age), can mean that the castings become crystalline and weaken. Problem is, there's really no way of telling without aeronautical grade test equipment for non destructive testing, and, over the course of 100+ years of differeing storage conditions, weaknesses may vary from frame to frame.

Best Regards,

Adrian

 

[removed]

same way with the evinrude... it was obvious to see some of the small parts were cast and sanded of buffed smooth

 

[Blue Streak]

From May 5, 1898 The Wheel:

Cropped images from article above:

 

[Blue Streak]

January 1897 issue of Digest of Physical Tests:

March 1898 issue of The Aluminum World:

June 1898 issue of The Aluminum World:

 

[Blue Streak]

August 25, 1893 issue of The Referee:

September 14, 1894 issue of Bearings:

September 21, 1894 issue of Bearings:

October 10, 1894 issue of Bearings:

 

[bikebozo]

The St.louis gutter company , the company that built the Lu-Mi-Num was destroyed in a storm , cyclones, tornados , I do not remember what year it happened .