[Originally posted on spudshot.com, then slightly edited, then posted here to get more traffic]
Ok I’ve been chasing the idea of an auto combustion for quite a while now. Surely it could be done with high tech electronics, lots of money, electronic solenoids, timers, pneumatic cylinders, etc. This is being posted so that we can provide solutions to problems faced in making an auto combustion, and hopefully this will speed up the time that it takes one of us to make an auto combustion.
The way I approach problems is to list the things needed to be accomplished then design something that will accomplish just that.
- Loading mechanism
And normal components such as barrel, chamber, etc...
This isn’t necessarily how the process needs to go, but your going to have a different concept in nature to “toss” up the order of the procedure.
I think when its broken done this way its much easier to understand and to design around.
Discussion of how such a item would be constructed/ operated:
Loading needs to be the first step because something needs to contain the fuel within launcher. Since in my set up loading will be first. Thus, the first shot cannot be powered by a mechanism driven by the combustion (blow back). So a “manual” force or a different force such as a pneumatic cylinder will be required to load the first shot. Also spherical ammo should be used because other shaped ammo will only add to designing difficulties. Although the problem with spherical ammo is that it usually is a low friction fit and light, not creating enough back pressure to drive a loading mechanism. This mechanism could be ran by a either forces from combustion (a blow-back mechanism) or a separate power such as a CO2 operated pneumatic cylinder.
If such a cannon was constructed I think an electronic solenoid on a 555 timer would be the best way to go because it would give you consistent fuel amounts. The timer would be synced by connecting a contact switch to a point in the loading process. Once contact switch is connected then the solenoid will open immediately, run for 3 seconds, then shut off.
This also might be run on a 555 timer switch, which would be set off by the same contact switch. Say that the fueling process took 3 seconds, and then you could set the timer for the ignition (stun gun would be the way to go) at 4 seconds. The duration would only be say half of a second. This means it would detonate a second after fueling sequence is completed.
This would again also be set on a 555 timer. Once the contact switch in connected it will delay for 5 seconds then run for an undetermined amount of time, then shut off. You would vent via a leaf blower or compressed air. This would force burnt fuel out of the barrel. There also would have to be a check valve between the chamber and venting source, because combustion would damage venting system. The check valve would have to be modded so that it can be opened a low pressure from venting source side. Maybe even have it slightly opened then force from combustion would force back close. Then have additional spring to reset check valve.
Then the process will be reset. A problem is that this method you wont be able to use a combustion driven force for reloading mechanism. Also electronics will be a [female doggy].
This was posted so that we could point out and hopefully solve the more then overwhelming number of problems. Trust me there’s over a billion in my above process (I just got done counting).
If you have any concepts be heard! Also diagrams would be greatly appreciated. Make sure you think out before posting so that Im not here correcting mistakes. By that please don’t be shy though.
None of these 2 liner bullshit posts that ive been reading a lot…