launching missiles

[Steven WalkerParticipant @stevenwalker14202]

Does anybody a have any info on making missiles and launching systems for rc boats. I am looking to use an vertical launch box and a launcher on my FFG )7 class ship.

Any help or points in the right direction would be great.

 

Steve

[Steven WalkerParticipant @stevenwalker14202]

[ashley needhamParticipant @ashleyneedham69188]

Steven   Wow! good stuff, how big is the boat and thus how large are the missiles going to be, or can they be a bit oversize for effect. Do you want smoke and flames, or just a simple ejection system? Not that I have a clue, but all sorts of possibilities suggest themselves. The fat controller wants to make his M1 sub fire..not sure EXACTLY what, but health and safety laws are bound to impinge on any really DECENT missile system Ashley

 

(some years ago i bought, at bonfire night time, a few packets of little rockets, about 1/2 inch in diameter. These I planned to put in the exocet boxes on the front of my Leander frigate. i would have fired them by using fuse wire to ignite the motor….the sticks for guidance could have poked through into the superstructure…..i never did it of course, but it seemed like a plan to me…. I still have the rockets……).

 

[ArneSParticipant @arnes]

General comment – is it wise to encourage such an activity?

ArneS

[Steven WalkerParticipant @stevenwalker14202]

Ashley,

 Its 1/72 which puts it about 1.9 metes. Vertical are going to be a bit over size, but the launceh will be to scale. I am looking at both C02 and mini rocket motors for a start.

 

 

Steve

[ashley needhamParticipant @ashleyneedham69188]

Cant help thinking ACTUAL rocket motors could be a bit dangerous, from a person point of view and also a misfire and burning the boat to bits viewpoint. At  that size, as a suggestion, the fatter sized paper drinking straws, cut to length and sealed at the sharp end and then filled with a powder to be launched by Co2 may look effective….be of a scale(ish) diameter and be light enough not to need too much power to launch?  coupled with a woosh!! sound from an effect speaker/module?   The trick may be launching “on demand” and reloading etc etc. The Fat Controller also was musing on this subject for his M1 sub. A revolver system was contemplated, from memory?   Ashley

[Dr John BoothParticipant @drjohnbooth43899]

Steve & Ashley 

I am sorry about this but I have to make you aware of the legality regarding the manufacture and deployment of either gas or rocket powered projectiles as they will very probably infringe the firearms act and you could find yourself in very deep trouble especially if the police and legal system consider your creations to be firearms. 

I understand that Paul’s intention with his M1 was that the gun should be firing blanks, lots of noise and smoke but no projectile, but even this proposal has to be designed very carefully to avoid the model barrel from falling foul of the legislation and falling into the category of being a firearm. 

I have suggested to Paul that he designs a smoke/noise generator, probably gas powered where the exhaust is connected to the barrel of the model gun, the effect would be the same but the firing and propellant system would be remote from the barrel and therefore could not be misunderstood or used as a potential weapon but even then I have strongly urged him to discuss his designs with the local police firearms experts and seek their approval before he builds and operates the model. 

Dr John Booth

 

[ashley needhamParticipant @ashleyneedham69188]

John. good point. Perhaps we could hear from anyone else who has built, or contemplated a weapon of mass destruction!  (in the model boat department) Must be someone out there who has dabbled with missiles-for-effect?      I have certainly seen magazine pictures and other stuff on the `net concerning fighting warships with smoke, explosions and such   Ashley

[Paul TParticipant @pault84577]

John, Ashley & Steve 

 

I have discussed my M1 gun with a police firearms expert and he has advised me that the barrel should be designed to operate at less than 10lbs pressure so that any inadvertent object left in the barrel could not be ejected fast enough to be a projectile.  

 

Paul

[Colin BishopModerator @colinbishop34627]

John and Paul are quite right. You do have to be very careful in the UK with projectile “weapons” of any kind other than probably water. The regulations are more lax in other countries which is why in the States there are clubs that build balsa models fitted with ball bearing guns and spend their time blasting each other to pieces. Takes all sorts I suppose…

 

Colin

[Steven WalkerParticipant @stevenwalker14202]

To All

First out here in Aust we have simular laws to the US where we are legal to fire the CO2 powered BB guns on war ships.

 

i take your point about the safety concerns with a fire onboard a GRP ship. I have seen some CO2 combind with water for firing an I might go down that way. Can any body help with that.

 

 

Steve

[Dr John BoothParticipant @drjohnbooth43899]

Hello Steve 

It would have helped if we had known that you are in Australia as we all assumed you were in the UK.

It is perfectly possible to construct a gas powered low velocity launcher that can be fired by a servo and that the addition of a small amount of water in the mix would produce an impressive “cloud” burst of vapour as the missile leaves the launcher. 

A bigger engineering problem would be the design and construction of a multiple launching system. 

Personally I would use solid fuel pellets to power small rocket motors.

John

 

[neil hpParticipant @neilhp]

we used to mess around with rockets as kids years ago,

our choice of propellent was a mixture of sodium chlorate [ weed killer] 2 parts, suger 1 part and a pinch of salt petre’

wrapped in a cardboard tube, they went well.

they could then be “fired” by two electrodes with a 12 v battery.

[Paul TParticipant @pault84577]

Hi Neil

 

Nice to have you back on board.

 

Paul

[neil hpParticipant @neilhp]

cheers, paul.

amazing what pills and a new pair of glasses will do.

still as grumpy as ever though. lol

neil

[Gerald Gardiner 1Participant @geraldgardiner1]

I did try using model rocket engines once as torpedoes, they would have worked well as surface to surface missiles. They went 30 yards before they touched the water. They did scorch the deck up a fair bit.

Regards,

Gerald

[Mike DavidsonParticipant @mikedavidson22772]

I have read all the posts, and re-considering my past efforts, all I can say is that the intention must be to produce a flash and a bang followed by a smoke trail which would look like a missile being firedexocets we don’t needwe have enough natural hazards to couse grief with our models, so applying ALL my experience and knowledge, to be guilty of any offence, some-one / any – one must be able to prove intent, so if you study the devices you intend to use and clearly show intent to limit any harm they might cause, you will have an umbrella of sots as a damage limitation tool for yourselfI would suggest limiting the size and power of any projectiles you use to limit the effective range and hitting power they might have, for example, a historical group here in Plymouth regularly fire a cannon from Crownhill fortfor show. To enable muzzle loading and tamping down the powder, they use a block of OASIS foam because the instant it leaves the muzzle of the gun itbreaks up into minute fragments, and to my certain knowledge, the gun is pointing directly at a local Macdonalds, Hmmmmm, for the sake of my grandchildren’s diet, I might substitute the oasis for a block of concrete.BUT, I am putting them up as an axample that they take active measures to eliminate the possibility of injury or accident. And at the final rekoning, they intended NOT to hurt anybody, so that’s the way to go, all you need is someting to go fizz bang wallopand produce sparks and smoke,.What else do missiles do? apart from going bang at the other end, but that could be engineered

easily to complete the illusion.Can I suggest a one inch portion of a jumping jack straightened out as they go like rocketsespecially if launched from a nice tight tube.

………………………………………..Mike……………Davidson

[Paul TParticipant @pault84577]

Mike

 

They cant fire a cannon with oasis as the shell, yes it turns to dust as it leaves the barrel but that dust is toxic to asthama sufferers and will travel for miles.

 

Have they no thought of the damage they are doing to peoples health??

 

What is a Jumping Jack?

 

Paul

 

I do agree about the buildings with the golden arches being a greater risk to public health than most things in our PC namby pamby world.

 

[John HoffmansParticipant @johnhoffmans55592]

Hello Steven,

 

I´m working on the same subject of firing missiles from the boat ´flyvefisken´ i´m building right now. The flyvefisken has a vertical launch system i want to replicate. I´m in the early stages of the design fase for the module but i´m planning to use solid fuel rocket engines. I will share the design when ready (but this will take a while)

 

Regards John

[Mike DavidsonParticipant @mikedavidson22772]

 

 I’m fed up with all this health and safety nonsese, I’m building afull scale model of HMS Rodney, I bet those three triple 16 inch guns make your ears pop when they go off. I bet if I build it from balsa wood, I can get the weight down below 75,000 tons, and just for a laugh, I’m going to tow it down to the pond on a trailer behind my pushbike

[ashley needhamParticipant @ashleyneedham69188]

Mike, sorry, wrong again, you will need at least a TANDEM to tow such a thing.  My TITANIC at  40,000 tons  (paper mache)  needs a TRICYCLE to tow. Ashley

 

 

 

 

[JC Uknz 1Participant @jcuknz1]

Since you are in Australia you could check the JAYCAR catalog, at the back of my 2007 version for a rocket launcher, r/c on 27 or 40.    Don’t know how it works but you might be able to canabalise it to your model

[JC Uknz 1Participant @jcuknz1]

The spam I regularly get from EBAY arrived this morning with the fireworks remote firing system included …..

see http://cgi.ebay.com.hk/ws/eBayISAPI.dll?ViewItem&item=290303239522&ssPageName=ADME:B:FSEL:HK:1123

[Craig MParticipant @craigm61647]

 

 

 I used Model rocket motors as SSM’s, worked a treat!

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