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Scott Flamelicker (Vacuum Engine)

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Hrmech:
I have built this engine but I can not get it to run. I am struggling with the timing, the piston and cam position. Could you please advise.

Bogstandard:
Hi H,

Welcome to the site.

The way the cam is made, this engine can work in both directions, I have mine running clockwise when viewed from the side away from the flywheel (see last video).

First things first, you must ensure that the cam follower bearing is in contact with the cam at all times, make sure the spring underneath the operating arm holds the bearing in contact all the time.

The basic setting is to set the loose cam so that the carbon block is lifted fully upwards just as the follower leaves the hi spot on the cam, not half way along the upper face, covering the inlet hole completely, then holding the cam solid, turn the crankshaft until the piston is at TDC. If you now tighten up the cam grub screw, your settings should be good enough to run.

Notice how I had to cut away the carbon block to allow easier access for the flame. The flame position can be rather critical in these flame lickers and is the cause of most of them not running.

When I get back onto my build, I will be changing the block movement from dropping downwards to open the port, to be being lifted upwards to allow the flame to enter the port directly from underneath without having to wait for the block to get out of the way.

I hope this helps.


John

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