torpedo system

[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]

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.

[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?

[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,

[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:

[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.

[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

[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

[toppack]

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

[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. :)

[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

[Slats]

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

Its pretty much the same in Australia.
My on board VLS systems of 72nd scale targets use Mirco rocket engines as these are scale for SM2, Harpoon, and are overscale for evloved Seasparrow. Nonetheless I have had to mount these within VLS silos, my Harpoon cannisters I am putting on my Anzac frigate are around 35 degrees off vertical and to be within the law I either adjust the pitch (out of scale), or keep the system within the VLS (vertical).

Now that's rocketry aside lets get back on to torpedoes.

[deepseadiver]

I can live with those kind of rules sounds like they have conditions to reduce any injurys.

Jim

[deepseadiver]

a very expensive version of a torpedo system from japan

http://www.youtube.com/watch?v=1aDDlCHjewc

[Slats]

Leaving what colour the torpedo will come in to those without an airbrush…(come on guys – don’t like the colour – re-paint it!) :eek:

Here are a few questions of mine. Its not that I am inpatient, its just I tend to build relatively fast and these questions pertain to having my boats ready for the torpedo installation. In fact HMAS Rankin is progressing quickly and I intend from the get go to install the torp system in her. This means I might need to buy and build a new SD for her too.

First: the firing mechanisim.
Do we run a servo linkage out of the SD for this in addition to the electronic gizmo (sequencer)– you mentioned previous that plugs into the RX?
Is RX 5 volt power the only power required for the squencer unit?

If NO for the servo linkage, and its some sort of electrical device plugging from the mechanism back to the SD – how is the electrical wires to the SD waterproofed?



The radio:
Which is the best ctrl from the TX – switch / dial / gimbal?
It is only 1 channel required right?



The 4 shots / tubes –
Can these be configured across the bow OR 2 per side like on a Permit or later SSN?



Torpedo equalisation and ballasting
Does the weight of a fully “propel” charged torpedo roughly equal the free flooded empty tube? Moreover if the shot gets charged in tube prior to release I take it there would be a negligible change in trim (to the bow for example if bow tubes are fitted) to compensate for the liquid propel being distributed in the torpedo forward.



Interior required space in the submarine for 72nd scale system
For a bow configuration?
For two per side like a Permit?
Size (length and diameter of 1/72 scale tubes)?
Size (length and diameter of 1/96 scale tubes)?




And something for my FFG and FFH(targets)
Can these warshots fire from tubes above the surface of the water?



Range of torpedoes in 1/72 and 1/96?
I also read a couple of years back the 1/96 shots actually went further than the 1/72 – was wondering if correct what the science was behind that.


Now that is a list of pain in the back end questions.:D

Adding to my above list of painful questions for David is:

Transportablity / Transferability
Will the torpedo system be transferable from boat to boat in much the same way a SD can be shared amongst similar sized models?

To clarrify, I'd imagine that you would install fixed tubes inside a model, but was wondering if the these could be a sleave set up where by the torpedo tubes containing the torpedoes themselves could sleave into a greater outside diameter tube fixed in each boat, there by allowing the whole torpedo system to move from one boat to another of the same scale?