BMPT Forum Homepage
Forum Home Forum Home > General Discussion > Modelling
  New Posts New Posts RSS Feed - Torpedoes & Bofors Gun
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Torpedoes & Bofors Gun
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
E.S.ChildsDrum1 View Drop Down
Groupie
Groupie


Joined: 02 March 2005
Status: Offline
Points: 43 		Post Options Post Options   Thanks (0) Thanks(0)   Quote E.S.ChildsDrum1 Quote  Post ReplyReply Direct Link To This Post Topic: Torpedoes & Bofors Gun
    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
E.S.Childs
Back to Top
Christian View Drop Down
Senior Member
Senior Member


Joined: 17 June 2005
Location: Gibraltar
Status: Offline
Points: 775 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Christian Quote  Post ReplyReply Direct Link To This Post 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. 
Back to Top
dgray View Drop Down
Senior Member
Senior Member


Joined: 24 November 2005
Location: United Kingdom
Status: Offline
Points: 580 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dgray Quote  Post ReplyReply Direct Link To This Post 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
Don


Only a number, not even a name. How shall posterity hear of thy fame?
Back to Top
clive View Drop Down
Senior Member
Senior Member


Joined: 11 December 2006
Location: United Kingdom
Status: Offline
Points: 379 		Post Options Post Options   Thanks (0) Thanks(0)   Quote clive Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2007 at 11:26pm

Hi Ted,

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

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.........
masbie something in the water.   www.freewebs.com/masb32/
Back to Top
E.S.ChildsDrum1 View Drop Down
Groupie
Groupie


Joined: 02 March 2005
Status: Offline
Points: 43 		Post Options Post Options   Thanks (0) Thanks(0)   Quote E.S.ChildsDrum1 Quote  Post ReplyReply Direct Link To This Post 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.
E.S.Childs
Back to Top
Christian View Drop Down
Senior Member
Senior Member


Joined: 17 June 2005
Location: Gibraltar
Status: Offline
Points: 775 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Christian Quote  Post ReplyReply Direct Link To This Post Posted: 12 January 2007 at 2:20pm

Hi Ted

Try http://www.fastcomponents.co.uk/index.php?cPath=43 for motors to train and elevate the gun.
Back to Top
S R Wilson View Drop Down
Senior Member
Senior Member


Joined: 08 December 2006
Location: United Kingdom
Status: Offline
Points: 170 		Post Options Post Options   Thanks (0) Thanks(0)   Quote S R Wilson Quote  Post ReplyReply Direct Link To This Post 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.
SRW
"Never yield to force; never yield to the apparently overwhelming might of the enemy" WSC.

Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down