Zon Bird Cannon Function under Propane Pressure.

Close up example of the cycling and timing of my Zon Bird Cannon from 1965 or so. (Date on the tubing is 1965).
I took the sparker out so I didn't go deaf. I have another vid with the sparker in place but using air instead of gas.
The timing is controlled by gas flow knob. Might also be able to control blast size by adjusting the plunger spring tension in the secondary diaphragm bell.

[@nielshulzebos3432]

Hi,
While we were checking our new project, the same kind of bird scare cannon from dazon, we came across a problem with the spring shown around 1:15. We couldn't get the rod ,which moves with the membrane and lets the Flint spark, under tension without it standing upwards or coming loose.
Do you have any tips for the right assembly method?
With kind regards,
Niels

[@TheWhiteleather]

I can't know which rod at which function you mean from your comment matched to the video.
It is possible that the timing rod passing through the iron bell on top of the diaphragm has chipped the bell, or is coming too far upward.
Sorry I cannot be more specific based on your comment.
Can you video your unit in motion and show the problem?

[@nielshulzebos3432]

@@TheWhiteleather thank you for your reply, I will make a video later this week or next week to show the problem. Hopefully, the video will explain the problem better than me with my crappy English as a Dutchman.

[@martinst.charles6257]

thanks for the video this might help me ,mine wont fire it isnt as loose it wont trigger to fire ,not sure how the secondary diaphram bell works thanks

[@TheWhiteleather]

Dude, e-mail me directly and we will get it figured out. These are elegant, AMAZINGLY simple machines (...that will also blow your eardrums in..) to repair.
Regards [e-mail].