When you look at AmyJo you could be forgiven for thinking not much has been done but you would be wrong.
|Um looks like metal spiders have taken up residence|
|The starboard stern plate|
|Jim points out the welding that was taking place|
|The engine bed and, the water cooling tank, are now done|
The welding set is earthed or connected with a cable to the hull and a high voltage electric current is passed through the welding rod. When the rod is moved close enough to the metal an arc jumps across from rod to hull completing a circuit melting the flux and welding rod at its tip. The extreme heat generated from this melts the steel in the mediate vicinity in to a molten goo that fuses as the weld cools. The flux stops oxidisation occurring during the weld. This stops a coke build up weakening the joint. The flux dries to a coke like crust which is then scraped or tapped away leaving a clean metal joint underneath.
Having watched through a welding mask to see the process up close I was fascinated to see the weld take shape.
The hissing and crackling you can hear is not a fault with the video, it's Craig welding the rubbing band on the port side at the stern and the fussy bright cloud at the end is actually smoke from the weld.