I've started welding the inside seam of the conning tower, as well as starting work on the windows. For the inside seam I decided to get rid of the small flaps of steel I bent up in the previous blog, it would have been too hard to weld them without burning holes in the drum. And I made the front window slightly higher.
Fig. #1. A before shot of the rear inside seam. All those flaps have to come off, which involves sitting in the sub with an angle grinder in my lap.
 |
| Fig. #1 27/05/2016 |
 |
| Fig. #2 27/05/2016 |
 |
| Fig. #3 27/05/2016 |
 |
| Fig. #4 27/05/2016 |
 |
| Fig. #5 27/05/2016 |
 |
| Fig. #6 27/05/2016 |
Fig. #7. I had to hold the sub on it's side so I could lean in and weld the inside seam.
 |
| Fig. #7 27/05/2016 |
 |
| Fig. #8 27/05/2016 |
 |
| Fig. #9 02/06/2016 |
Fig. #10. Moving on to the front window. Sat there for a while trying to figure out what was the best way to do it. After sitting in there for 5 minutes I decide to cut the window out higher by about 40 mm all up.
 |
| Fig. #10 02/06/2016 |
 |
| Fig. #11 02/06/2016 |
Fig. #12. Much higher. However it will look a bit smaller once the window rim goes in.
 |
| Fig. #12 02/06/2016 |
Fig. #13. Cutting the pieces out from 20 mm x 5 mm mild steel bar. I found a few rims that were rolled up a few years back which I'll use for the top and bottom of the rim. I had to also make the frame a bit higher again.
 |
| Fig. #13 02/06/2016 |
 |
| Fig. #14 02/06/2016 |
 |
| Fig. #15 02/06/2016 |
Fig. #16. The window rim has been tacked in place. There's a few big gaps, mainly around the bottom, but it should weld up nicely.
 |
| Fig. #16 02/06/2016 |
The next step is to mill out the window from 5 mm thick clear perspex, along with all the bolts holes, and use that as a template to drill the holes through the window rim. Then I can weld the rim in completely and move on to the rear window.
