torpedo system

[Tutor]

come to Canada, model rocket rules are.

5 miles from an airport
no great then 30 degrees off vetrical
must have recovery system , ie, shoot, tumbel or glide
any thing over 5000 feet you have to file a flite plan( man is fun to do)

and thats it.
oh ta, use commen sence.

Tutor

[deepseadiver]

Yes, Rocket launches should follow the same rules and laws that fireworks displays do, because that's really what they are.

thanks for the sapport ! I do not want my kids around it, like you said its a fire work . I dont want to see any ones kids hurt from something like this. Being a costee i think alot of saftey thats all. :)

[toppack]

Yes, Rocket launches should follow the same rules and laws that fireworks displays do, because that's really what they are.

[deepseadiver]

The video show the torpedoes, how they are made. But they do not show torpedoes, launching from the submarine, Only the rockets what a shame.:rolleyes: I want to see the torpedo do there stuff. The rockets would look better if they did not spiral around, they need to go straight up. All well it's the effort that is made is whats nice. I hope those rockets do not one day spiral out of control and injure a child since they don't fly straight just an observation :)


Jim

[redboat219]

Check out these videos:

http://www.youtube.com/watch?v=89zlFbmSy18&feature=channel

http://www.youtube.com/watch?v=PANHv4LyYEo&feature=channel

http://www.youtube.com/watch?v=RpCLNrP5BSE&feature=channel

http://www.youtube.com/watch?v=Ky2Ra02pyPk&feature=channel

http://www.youtube.com/watch?v=yYlgnIkKkl4&feature=channel

[KevinMc]

Hi guys!

I agree with Andy- if you want to do a timed-run electric torpedo, learning about microcontrollers is definitely the way to go. I can't speak for the Picaxe, but the baseline PIC's that they're built from are fantastic. Microchip (PIC's manufacturer) also has the smallest micro available in the PIC10F series - it would be a tight fit but you could get one in to a 1/72 torpedo. (I dunno how you'd float it though!)

As for the question of torpedo tube (shutter) doors, I guess I'm a masochist- my OSCAR's getting her tube doors right now.

[toppack]

Going back about those torpedo doors. David said "Keep it simple:no doors."

I was wondering. Would having all those hull openings in front have any effect on how the boat handles specially at high speed?

I'm not trying to argue with David but,
If we're talking about Mach-speed or Warp-speed here, It will! :D LOL :D
It may even limit the speed to Under 500.MPH! :eek:

[He Who Shall Not Be Named]

Going back about those torpedo doors. David said "Keep it simple:no doors."

I was wondering. Would having all those hull openings in front have any effect on how the boat handles specially at high speed?

Nope.

David,

[redboat219]

Going back about those torpedo doors. David said "Keep it simple:no doors."

I was wondering. Would having all those hull openings in front have any effect on how the boat handles specially at high speed?

[Subculture]

Actually the circuit that Kevin has used for the little air pumps would be a good start. The firmware could be adapted to cater for a different application.

At a minimum for a time controlled electric fish, you'd need a switched source, this could be a MOSFET or an ordinary transistor switched from the microcontroller.

If the former, you would ideally use a logic level MOSFET to avoid having to use a separate driver, unfortunately these are tricky to source in small quantities (at least they are here in the UK). An ordinary transistor is easy to source, but less efficient. In this instance however the 0.6 volt diode drop is not necessarily an inconvenience, as pager motors are designed to run off about 4-4.5 volts.

You would want a couple of super caps to give 5 volts, and a voltage regulator for the benefit of the microcontroller.

You will also need either a small reed switch, or possibly a hall sensor to detect when you want the fish switched on.

All sounds a lot, but with surface mount components, it will all be tiny. Your soldering skills will have to be good, and you would need to make your own PCB.

I would use a Picaxe microcontroller- they're very easy to code, and have the routines needed already built in. They're inexpensive too as they're just PIC chips with a bootstrapped code.

Inside the submarine, you would need an electromagnet. Winding a few coils of wire around an old nail would do the trick. This could be switched using a relay or solid state switcher of some description.

[Slats]

Andy or maybe Kevin,
any ideas of what a basic circuit would look like and components involved?
Yes I know I ask a lot but am electronics ignoramus and want to know more.

J (resident pain)

[Subculture]

Yes, okay, but my response was chiefly directed towards John's request for a system small enough for a 1/72 fish.

Here's another link to some suitable caps http://media.digikey.com/pdf/Data%20...Z%20Series.pdf

[toppack]

As stated earlier in this thread, I want to be able to launch from middle of pond to shore, at least several times before having to recharge Anything. :) A 3A battery, on these motors, should be able to do that and then some. I don't want to have to retrieve any from middle of pond. I want them to land at my feet, ready to go again. :)
As stated earlier in this thread, I'm making a tray with built in deactivation magnets in it, to turn off motors as they are retrieved on shore, to be ready to reload.

[Subculture]

What amount of capacitance were you running, and what were the size of the torpedos and motors powering them?

For a small torpedo you should be able to get at least 30 seconds of running (how much range do you want!).

[toppack]

Yes, I experimented with capacitor powered torpedo motors. This was discussed before in this thread, I think.
I found that they would have an even shorter propulsion range than gas does.
Not what I want!