Sunday, May 31, 2015

Prototype Skirt Inflated

Thanks to my helper Jenny today! We successfully inflated the test skirts using

We had to tape together 2 corners. Batten down the perimeter and then make a few tweaks to the starboard hull. (Note it's upside down and pointing into the garage so the starboard side is away from the camera.)

Inflated skirts


Here's the timelapse:



The skirts inflated and could take some weight resting on them with just the shop vac!


Lessons Learned

There were quite a few lessons learned today.

  • The port side skirt ended up 2" too short, so the front had to wrap around.
Missed front port corner.

  •  
  • The front batten port most screw got started cross threaded, and I tried to force it. Unfortunately the weakest point in the system is the wood the tee-nut is threaded into and I ended up with the tee-nut spinning behind the batten. It took some forceful work with vicegrips to get the screw out. And now the threads in the tee-nut are shot, so I think I'll be grinding that section of the batten out and gluing in a replacement segment with a new tee-nut, since the corner is the most critical portion of the batten.

Cross-threaded



Adjusting the starboard side required a little scrunching:
Scrunched skirt under batten from shifting starboard skirt by 2 inches

Also the rear starboard corner does not quite line up correctly. When transferring the template we need to make sure to take this into account.
Corner length miss alignment. The port side was folder over to match.



Next steps:

Landing pads, to protect the skirt when landing.
Lift engine mount. I think I'll test it out of wood for quick fabrication and testing. Then move onto waterjet cut alumninum. I think the wood will be strong enough for initial testing.