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Torpedoes & Bofors Gun

Printed From: BMPT Forum
Category: General Discussion
Forum Name: Modelling
Forum Description: Discussion about Modelling
URL: http://www.bmpt.co.uk/forum_posts.asp?TID=238
Printed Date: 26 March 2026 at 7:24pm


Topic: Torpedoes & Bofors Gun
Posted By: E.S.ChildsDrum1
Subject: Torpedoes & Bofors Gun
Date Posted: 14 November 2006 at 12:04pm

 

                         Hi. All.

          I would like to make Torpedoes that eject from the tubes and run on the water. Also I would like the bofors on the foredeck elevate and train this is for my new Gay boat and the scale is 1:16. any idears out there.

                          Regards Ted Drum1



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E.S.Childs


Replies:
Posted By: Christian
Date Posted: 14 November 2006 at 6:42pm

Hi Ted

Unless you can find stepper motors (maybe for car windscreen wipers) model boat sail-servos may train and elevate your guns, my plan for working torpedos at 1/16th scale was to use the cartridges for inflatable lifejackets in plastic plumbers pipe, with a servo-operated membrane-piercer to fire them. This is probably highly dangerous and may be frowned upon by grown-ups. You may end up torpedoing yourself, unless you can get fins on the back of them, they do have a threaded spout (same as a toothpaste tube but a little bigger) so brazing a few fins onto a collar which can then be wound on would work. Perhaps also a retrieval line so as to re-use this part. Otherwise the cylinders could be mounted inside the boat and simple plastic torpedoes made to fire by air passed through a delivery tube to the cylinders.

Don't blow yourself up!

B rgds, Christian. 

Posted By: dgray
Date Posted: 22 November 2006 at 9:56pm
As a thought, air pistols use smaller co2 cartridges than life jackets. It might be possible to add some flotation foam to give them shape as they, like the lifejacket cartridges, weigh a ton.  A foam type  'jacket' might if cut in half and the firing 'pin' built in. This would make the torpedos reusable.  Maybe that builders cavity foam, injected into a mould would do.....

If the floatation was correct, they could run on/near surface (if the fins were part of the foam casing).

I'm probably talking through my hat as I have never built a model but  it sounds like fun!  Matal cigar cases....
Good luck





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Don


Only a number, not even a name. How shall posterity hear of thy fame?

Posted By: clive
Date Posted: 08 January 2007 at 11:26pm

Hi Ted,

 I don't mean to post this twice - but will !!

http://www.pt-boat.com - www.pt-boat.com

there are 3 pages on torpedos and one on bofors, all far too detailed for me..

if anyone knows of a skeleton kit for a 63 or 70' whaleback I would like a challenge.

cheers, Clive.........



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masbie something in the water.   www.freewebs.com/masb32/

Posted By: E.S.ChildsDrum1
Date Posted: 09 January 2007 at 6:48pm

              Hi All

         Thanks for the info Clive`s Idea seems the best and I have downloaded all the info on torpedoes as my scale is bigger I hope to have some success later but it wont be for a couple of years yet.

                  Regards Ted drum1.



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E.S.Childs

Posted By: Christian
Date Posted: 12 January 2007 at 2:20pm

Hi Ted

Try http://www.fastcomponents.co.uk/index.php?cPath=43 - http://www.fastcomponents.co.uk/index.php?cPath=43 for motors to train and elevate the gun.

Posted By: S R Wilson
Date Posted: 12 January 2007 at 2:40pm

Hi, All

This might be total rubbish but have you considered a small eletric motor, battries and a micro switch the whole driving a propeller. Ejection can be achieved with compressed air using an air gun type arrangment but connected to pipes into the back of the tubes.

There are lots of small motors on the market and a spinning prop would look authentic.



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SRW
"Never yield to force; never yield to the apparently overwhelming might of the enemy" WSC.



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