Reverse Calabash pipes can also be wonderful to the eye, although they are often clumpy, chunky, ugly. Respect the exception, as there are quite nice, exciting-looking RCs, you could say, artistsic ones. The essence of the thing is not the appearance… but the dynamics of the internal flows.
We wanted to try out what it’s like to put an extreme but really extreme sized mortice in a pipe. Chosen an olive wood block with nice straight grain, made the most simple “tubesque” design for her, and started to work on it.
In practice, this solution should be imagined as after a draught the hot smoke in the chamber (A) is transferred to the short draft hole (B) and then the mass of smoke flows into the big-big mortice (C). Since the pressure increases here due to the Venturi-effect and the temperature of the smoke cools in inverse proportion, the smoke moving in this mortice should be in principle cooler. Since there is no possibility for the smoke to swirl aroud in this extra chamber and there are no steps on the smooth surface along where condensation would take place, the smoke leaves the cooling chamber to the mouthpiece without any small wet drops causing a gurgle what every of us tries to avoid. The present pipe has received a massive wide (15mm) but precise push tenon on the lathe, with a concave, uniform hemispherical inner shape (D). This puts the draft in front of a second Venturi effect, actually accelerating the smoke on arrival at the stem. As the airhole in the lip (E) is tapered (F), the smoke can be well dynamized when exiting the second venturi.
In practice, this means that even with quite small suction, we can extract high-quality and large amounts of cool and dry smoke from the chamber.
The experiment works! The pipe is really ugly 😭😭😂 and simple, but the smoking experience is ferocious 👍.
We can (also) build on such experiences and experiments on an ongoing basis.