Well this is a new thing.
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Well this is a new thing. My brain is making the sound of the doorbell when I wake up in the morning. I know it's all in my head because the dog isn't barking and nobody rings my doorbell at 4-5 am. But that's two days in a row that I wake up to that sound, and it feels/sounds like real thing.
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Well this is a new thing. My brain is making the sound of the doorbell when I wake up in the morning. I know it's all in my head because the dog isn't barking and nobody rings my doorbell at 4-5 am. But that's two days in a row that I wake up to that sound, and it feels/sounds like real thing.
@dillyd Interesting - I had that happen years ago, in the middle of the night I was waking to the doorbell.
Turns out, I was dilly dallying on an important decision, and once I had made that decision, the doorbells stopped.
Also, it turned out to be such an important decision, made the right way, and the results of which have had such a positive impact on my life ever since.
I wonder if it is the same for you? Good luck.
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undefined Oblomov shared this topic
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Well this is a new thing. My brain is making the sound of the doorbell when I wake up in the morning. I know it's all in my head because the dog isn't barking and nobody rings my doorbell at 4-5 am. But that's two days in a row that I wake up to that sound, and it feels/sounds like real thing.
@dillyd I get something similar when I'm just about to fall asleep. I hear either the front door slamming or one of the kids calling (but it's not real). Brain playing silly buggers.
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@dillyd I get something similar when I'm just about to fall asleep. I hear either the front door slamming or one of the kids calling (but it's not real). Brain playing silly buggers.
@eleanorrees it's super annoying when you're falling asleep. Also the leg jerk lol. I don't mind too much that it's happening to me when I wake up.
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@eleanorrees it's super annoying when you're falling asleep. Also the leg jerk lol. I don't mind too much that it's happening to me when I wake up.
@dillyd @eleanorrees I heard a phantom canary for months a few years ago.
No canaries were harmed for the making of this toot. 🤷
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Making a Cardboard Airplane Wing
Ideally, an aircraft would be made of something reasonably strong, light, and weather resistant. Cardboard, is none of those things. But that did not stop [PeterSripol] from building an ultralight wing out of cardboard.
Firstly, he wanted to figure out the strongest orientation of the cardboard flutes for the wing spars. He decided on a mix of horizontal and vertical flutes for the wing spar, with the horizontal flutes resisting vertical deformations and the vertical flutes resisting chord wise deformations.
The main spar is made up of two long strips of these cardboard pieces, glued together with a single sheet of cardboard on the top and bottom to create a structural beam. Unfortunately, the glue had not fully dried on one of the sheets before making the spar resulting in the final spar warping. Fortunately, the first wing was always intended to be tested to destruction. The wing’s ribs are made of laser cut cardboard, with doublers on the inside providing greater surface area for hot glue and a stronger rib.
Testing revealed the aft wing spar failed around 200 lbs, approximately equivalent to a 2G wing loading with a fully weighted aircraft. Since the aft wing spar broke, for the final production wings, that spar was reinforced with an separate piece of cardboard positioned perpendicular to the spar creating more of an I beam shape.
After the lessons learned from the cardboard flute orientation tests and the first wing destruction, the two wings for the final ultralight could be built. Minor changes were made from the prototype wing. After testing one wing to 150 pounds of loading, they were skinned in butcher paper to match the esthetic of cardboard. The wings came out weighing 21.8 lbs, more then ideal, but certainly workable for a single flight ultralight aircraft.
We look forward to seeing this plane fly, so stay tuned for more coverage! While you wait, make sure to check out his previous ultralight build!
