|
|
Post by pelle4242 on Nov 20, 2020 1:46:34 GMT -8
Hello all, new beginner here.
I want to try to cast a small 4 inch (100mm) J-tube (I know 6 inch is easier but I want to try to keep it as small as possible).
Can I please get some feedback on the proportions and if I have missed any vital elements? I understand it will take some experimentation but I would really appreciate a sanity check before I start building the mould.
|
|
|
|
Post by martyn on Nov 22, 2020 1:14:45 GMT -8
|
|
|
|
Post by pelle4242 on Nov 22, 2020 23:14:03 GMT -8
Thanky you. The idea is absolutely to keep it textbook for starters. The full core is 400x200x200 mm with the walls at mostly 50mm.
|
|
|
|
Post by martyn on Nov 22, 2020 23:55:19 GMT -8
I have build quite a few similar designs, you would find quite a big difference in warm up time depending on the materials used for the construction.
I have cast several one pice 6” versions that have lasted very well but the thinner there refactory the better the performance or at least the start up time.
If you cast in two parts with good quality cement, you only need 32mm thickness in fact for a small 4” version, if you have a vibrating table and suitable cement additives, you could cast a single piece 32mm thick.
|
|
amo
New Member
Posts: 11
|
Post by amo on Nov 23, 2020 0:36:33 GMT -8
Hello Everybody,
First post here from France, but long time follower of the forum !
I went through the "Small scale developpment" thread. But sadly couldn't find the "textbook" for the dimensions of Peter's J Tube.
Would you know if there's a spreadsheet or a scalable sketchup about this improved J Tube ?
Thanks a lot !
|
|
|
|
Post by pelle4242 on Nov 23, 2020 1:02:57 GMT -8
I have build quite a few similar designs, you would find quite a big difference in warm up time depending on the materials used for the construction. I have cast several one pice 6” versions that have lasted very well but the thinner there refactory the better the performance or at least the start up time. If you cast in two parts with good quality cement, you only need 32mm thickness in fact for a small 4” version, if you have a vibrating table and suitable cement additives, you could cast a single piece 32mm thick. My plan is to cast with an isolating mix of perlite and refactory cement, not sure what mix exactly yet but as I understand it isolating the burn tunnel is a good thing? |
|
|
|
Post by pelle4242 on Feb 14, 2021 5:56:12 GMT -8
Some progress at last. Finally got the first half of the mould done and casted a mix of perlite and refactory cement. Taking ages to dry due to cold weather so test burn is a while away. The tripwire is a bit on the small side but still worth testing the cast i think.    |
|
|
|
Post by peterberg on Feb 14, 2021 8:47:54 GMT -8
|
|
