OneX, landing gear axle fit

Discussion for Onex builders on specific plans page experience. These posts are limited to technical suggestions such as assembly order, challenges, or techniques related to specific plans pages.

Re: OneX, landing gear axle fit

Postby peter anson » Tue Nov 28, 2017 9:51 pm

I've come to this pretty late but it might be relevant for other things.
As a side issue, I always wondered what heating and cooling aluminum does, if anything, to its strength...

The answer is, cooling - no problem, heating - plenty, but it depends on the temperature and time at temperature. 6061T6 is made by "artificially aging" the metal at a temperature of around 180°C for about 5 hours. If it is kept at that temperature for longer, the strength falls off until you end up with something which I think is equivalent to 6061-0 which is pretty soft, but it does take time. If you are only heating the metal up to 180°C for a few minutes it will probably be OK but at higher temperatures things happen quicker and I'd guess that going above 200°C is a no-no. Here's a link to a report which explains it better:
And here is a summary aging graph.

peter anson
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