12 Shot Pyro Fitting

[outofmydepth]

Hello everyone.

I am hoping someone can shed some light on this 12 shot rotating chamber that fires Pyros.

As it rotates each pyro hits a positive contact and explodes but how is this controlled? There is a motor that rotates the drum but is there something that rotates it the right amount for each shot? If I connect a normal ESC to it then it keeps rotating and would set off a bunch all at the same time (and they pack a punch, it would probably blow the turret off if that happened!).

If anyone who has seen one of these in action, or used one I would be very grateful for some pointers, even how it is wired up to fire. There is a relay in the tank, and I wonder if this was used to send a large current to the positive terminal? I think I have found some Pyros that fit the bores although I haven't received them as yet (so not sure if they will fit).

Many thanks! Chris.

Drum in place

Drum - exhaust ports

Base of Drum

Base Contact

[Marco Peter]

Is that an 1/6 Armortek?

[outofmydepth]

Hi - it's from a 1/8th Model Works Tiger.

[Jay-Em]

Hmm.. seems there’s some serious gearing-down going-on there.

If I’d take a wild guess, it’s just the slow speed by which the drum rotates, that makes controlled firing possible.

Or màybe some kind of step-motor.

By the by, a construction like that would indubitably make one end-up in jail overhere in the Netherlands. They’re kinda paranoid afa constructions that go “Boom” are concerned overhere....

[Raminator]

A stepper motor would be an ideal way to ensure that the pyro charges line up incrementally and accurately, but if there's already a motor and you can hook it up to an ESC it obviously rules that out. I'd have to assume that there's some kind of linkage, trip switch or sensor that's missing; something that stops the drum from rotating once it's ready in position to fire the next shot. Either that or perhaps the pyro charge itself is the trigger? So when the drum rotates a charge over the firing contact, it closes a circuit that stops the rotation and fires the charge; then the drum doesn't rotate again until the next radio command to fire is received. Having never seen such a device, I can only speculate though.

[outofmydepth]

Hi Raminator and thank you for your input. This is a good theory! Perhaps power for the rotation and charge is sent via the relay (emanating from a radio signal) which in turn is switched to an off position when the contact for ignition is made - can a relay act in such a fashion?