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Scary Chassis Questions


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#181 fezzasus

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Posted 06 December 2016 - 09:17 AM

Ah yes, I think I see the bit you mean.

 

Personally I think the vast surface area of the flat surface to flat surface chemical bonds will be stupidly strong anyway, losing a few CM of glue on long spars won't affect it (if it is only melted in a few CM).

 

I built an ocean going boat out of epoxy in the early 90s. I know how strong it is.

 

Of course epoxy will be strong when used within it's working conditions. Here we describing temperatures which have burnt away epoxy. There's also a vast temperature range above the working temperature and below the melting point where the epoxy undergoes a glass transition and changes its properties significantly. You simply can't verify the performance of an epoxy based on it's presence and assumed performance prior to significant heating.

 

Note: Bond strength is proportional to the edge length of the bond not surface area. This means many lines of epoxy is significantly stronger than the same area entirely filled with epoxy.


Edited by fezzasus, 06 December 2016 - 09:19 AM.


#182 FLD

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Posted 06 December 2016 - 10:02 AM

Is there any risk to the heat treatment of the alu or any risk of corrosion with this? Having had aeroplanes with repairs it's a trick to know what to replace and what to repair and corrosion is a key one to watch for. Interestingly all the planes I've seen that were bonded together are now drilled and riveted! Sent from my iPhone using Tapatalk




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