My new shorty core 180

hello!
I am happy to write because I am in the process of building a shorty with a bench and a hob... I have just done the first ignition...
I am in the process of building the door, and here is the problem...
I have welded some flat pieces on which, along the edges, I have placed some small squares in which the gasket will be fixed, but after having welded them I noticed that the frame has deformed, what do you think is the cause? How can it be remedied?

Hi Cedric;
So, are we seeing an 8" Shorty in the Sidewinder version?
The firebox looks larger than a 6".
Shorty uses a particular airframe to supply air.
What I see in your photos does not look like mine.

The heat created in a Batchbox will try to warp any steel.

thomas rubino wrote:Hi Cedric;
So, are we seeing an 8" Shorty in the Sidewinder version?
The firebox looks larger than a 6".
Shorty uses a particular airframe to supply air.
What I see in your photos does not look like mine.

The heat created in a Batchbox will try to warp any steel.

it's a 7" shorty sidewinder
the door is under construction, it's not ready yet...
it warped during construction, while I was welding it

Ok, I see now.
Nice job on the core!

Did you tag weld your pieces of steel first, before you started welding?

Matthias Hacker wrote:Did you tag weld your pieces of steel first, before you started welding?

In fact, after having pointed it, I started from one end and I did the whole side in a single cord without stopping... the door became incandescent...
Rookie mistakes, it's my first welding job

Warping is a result of excessive heat, deforming the metal. Before you finally weld the pieces together, first tag weld everything. Like little connection points about every hand width. Clean the tag welds and then make the real weld. If you still experience warping, don‘t weld your connections at once, but little by little, with some time in between to let the metal cool down a bit.

Sometimes it’s handy to clamp your piece of metal to a table or maybe a piece of strong board, so that it can‘t deform. Pros use a metal weld table for that, but you can come away with a piece of pressed wood as well, just take care that it won‘t catch fire too much.

Watch some welding stuff on YouTube, there is amazing stuff out there with a lot of things to learn a lot from.

I am far away from being a pro, but made some experiences.

In the end I redid the door frame, I spot welded it to the bench, and I did the welding a little at a time, letting it cool, it practically didn't bend.

Work in progres...

Cedric Noussan wrote:Work in progres...

Here the photo of Building
https://drive.google.com/drive/folders/1w9RYzvW2mqEuIUer5uM-1TbGfohPpPow

Thanks for those photos,  I like your style and ingenuity. Wondering about your mortar, is that a grey type of clay or perhaps a refractory cement mixed with sand?  Also, could you give a review of performance and idiosyncrasies thus far..

Rico Loma wrote:Thanks for those photos,  I like your style and ingenuity. Wondering about your mortar, is that a grey type of clay or perhaps a refractory cement mixed with sand?  Also, could you give a review of performance and idiosyncrasies thus far..

hi riko
the mortar used in the combustion chamber is refractory clay and sand, while for the rest of the construction it is cob
at the moment it is in the drying phase
at the moment I did not want to insert a by pass because I intend to insert a coil to heat the water between the two skins.
for cold starts I put a primer in the flue where I left the inspection... it was not a choice I would make again...

I would like to report my experience of building rockets on wooden floors:
in this construction the stratification is as follows:
1) wooden floor
2) 2cm of sand
3) 5cm of cellular concrete
4) 5cm plank that thanks to a vertical part creates a draft
5) 4cm of expanded clay and cob
6) 3cm of refractory
on the floor I placed a temperature sensor, never reached more than 40 degrees

I have a couple of possible applications for a Shorty sidewinder. Can you share more information and photos of how you built the core, and how well it works?

Glenn Herbert wrote:I have a couple of possible applications for a Shorty sidewinder. Can you share more information and photos of how you built the core, and how well it works?

hi glen,
unfortunately all the photos I have are in that link
it's still drying at the moment but it seems to be fine
if you have any questions just ask