Oh no! Not another Cracker? But there's always room for one more cracker!

[Tony Bird]

Hi,
Sorry but I'm not too good on theory but have made a burner for a Cracker. Hopefully the following photographs will help. A small air hole was made in the burner tube in front of the jet. This hole was enlarged until the flame looked right and was controllable high/low.
Small hole.

Larger hole high setting.

Larger hole in low setting.

Test in flue tube same size as fitted to boiler

Hope this might help.

Regards Tony.

 

[shred]

FWIW, my Cracker burner doesn't burn for beans outside the boiler, but roars away when installed, so be sure and try it installed as well.

 

[rpbidgood]

Thanks, I will try all your suggestions.
Keith.