11 replies to this topic

[ITCHI]

I am starting with unchoked fountains and was wondering just how important the hole made by a real fountain tooling kit is and how far into the tube it needs to go if it is very important.
Also, what is the suggested choked hole for a 1" ID tube?
Thank you for any and all responses.

[Zinginex]

I am starting with unchoked fountains and was wondering just how important the hole made by a real fountain tooling kit is and how far into the tube it needs to go if it is very important.
Also, what is the suggested choked hole for a 1" ID tube?
Thank you for any and all responses.

Err i heard that a good size ID for a choke or "spindle hole" is 1/3 of the ID of the fountain Tube's ID. So for a 1" ID tube it would be a 1/3" ID choke/spindle hole. Someone correct me if i'm wrong. And a choke/spindle hole is important if you want a fountain that shoots high up. The choke makes the pressure come out of a smaller gap which means more pressure out of that one smaller gap. Hope this helps

[ITCHI]

That does help but I guess I am also asking is the spindle made hole necessary on an unchoked fountain and also what about the choked fountain?

[Zinginex]

Sorry i don't know much about tooling for fountains. I guessed that a spindle hole was a choke . Sorry

[ITCHI]

No problem buddy, I may be describing it all wrong too.

[maxman]

By definition an unchoked fountain has no choke! A faster comp may then be used. Slower in a choked fountain. The core need not penetrate the comp but the choke needs to be thick enough to withstand the burn and pressure.

[ITCHI]

Thank you gentlemen.
I just didn't want this thing to explode by not having the hole if it was important.

[maxman]

Well of course stricktly speaking a choked fountain is more likely to explode than an unchoked

[Zinginex]

Yeah maxman is right. If you have a choke it's possible for that to get blocked up then the gas and pressure will become contained and you can guess what happens next.

[StevenRS]

Choke= more pressure = faster burn = higher fountain
Spindle hole in comp= same as above, by increasing surface area

[ITCHI]

Ok, that clicked in my head. I can do an unspindled but choked fountain.

[StevenRS]

Exactly. Comps that burn very slow might require both, and very fast comps might not need either.