The OBS Engine is quite distinctive.
It sits 25mm in diameter yet only 54.5 mm high, the top airflow altering the proportions and making it appear even shorter.
Despite its diminutive appearance, the tank boasts a liquid capacity of 5.2ml.
The body is made from 304 Stainless Steel, in this case externally black coated, with a quartz glass tank.
On top, we have a short, sloped base POM drip tip that fits into a standard fit 510 socket.
The very smoothly machined top cap is a busy place, holding the top airflow as it does. The airflow control ring has three good sized openings and is smooth without being too loose.
Helpfully, the ring is just slightly recessed to help prevent accidental movement.
Below this we have the fill ring, with the distinctive machining of the OBS logo.
Pulling this ring upwards reveals the side fill port which is easily big enough to take a large dropper or bottle tip.
The position of the fill port is helpfully marked with a drip symbol.
Below the quartz glass tank, we find the base, helpfully knurled to aid removal.
On the bottom, we have a fixed gold plated 510 pin sitting nicely proud of the threads. The base reads “Designed by OBS” and has the Engine name and regulatory marks.
A nice touch is that the main of the base is recessed to prevent the coating and wording from being rubbed away.
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Unscrewing the base reveals the velocity styled deck with its PEEK insulator.
The deck is 17mm across, giving plenty of room for thicker builds although the wire holes are not particularly big.The deck has two lugs that engage with the chimney to ensure the airflow is aligned correctly onto the coils. Simple but clever.
The airflow passes from the inlets down the outer tube of the chimney and down over the coils, the resulting vapour being drawn up the centre tube.This not only helps prevent leaks but it also reduces the amount of heat energy that would normally be wasted heating the e liquid and tank, instead pre-heating the air destined for the coils.