A twist on triangulation
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Author:  a.moore [ May 21, 2020, 4:35 pm ]
Post subject:  Re: A twist on triangulation

KB58 wrote:
The problem isn't tube fabrication, it's allowing (easier) access to the entire circumference of every tube when welding. If the head of the TIG/MIG can't be maneuvered into position, it's hard to know whether weld strength is sufficient.

The angle is pretty much the same whether it goes to a node or stops 4" away. Round tube makes it even easier since you can get the torch closer to the center.

It is purely to make those tube lengths less critical. You only have to be close enough to do it how they chose to. If you're only building one chassis, make it perfect and have it go to the node.

Author:  kreb [ May 21, 2020, 5:18 pm ]
Post subject:  Re: A twist on triangulation

Again, not meaning to pick on the Goblin. They look WAY safer than most Locosts.

Author:  rx7locost [ May 21, 2020, 8:44 pm ]
Post subject:  Re: A twist on triangulation

Since the Goblin is built with round tube, if the diagonals were made to made to point to the intersection, how would they do that? It would require a specific construction order. And possibly not even possible? I don't care to figure that one out. Someone want to?

Author:  KB58 [ May 21, 2020, 10:48 pm ]
Post subject:  Re: A twist on triangulation

It was described before: one "ear" at each end of the diagonal is cut off, it's slid into position, and the ears welded back on.

Author:  a.moore [ May 22, 2020, 10:07 am ]
Post subject:  Re: A twist on triangulation

There are two more scenarios:

Often the weld bead that is being covered by the diagonal tube fills most of that space. By the time you round the tips of the ears Kurt described to clear the weld, you can slide them in and there won't be a large gap to fill.

If that fails then it becomes an order of operations - bottom tube first, diagonal second, top tube last.

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