Gastorpedo's

MFR · Oct 17, 2009, 06:19 AM

I'll start here a new buildingreport concerning the build about the gastorpedo's, and offcourse the launchingsystem.
Be patient, the pics will follow soon, first have to sort out all the pics i've took during the build sofar.

MFR · Oct 17, 2009, 11:29 AM

This was the start, using aluminum tubing and wood for the front and rear parts.

After making some front and rear pieces on the lathe the first torpedo's emerged.

Next thing to do was to make the fillercap for loading the torpedo, it's a regular fillercap from a gaslighter, a guy at our Dutch Forum has come up with this trick, inspired by his succes i also took a shot at it.

Next step is to prepare the fillercap for the head of the torpedo, this is the second stage after removing the fillercap from the gaslighter.

After preparing the fillercap i glued it inside a small tube, the tube complete with fillercap goes inside the head of the torpedo.

Drilling the right size of hole inside the front end, and making it waterproof with a solvant.

Done the same with the back end, and made the nozzle with a opening of 1 mm, drilled trough the filling of 2 component glue.
During testing it revealed that this wasn't the good solution for the nozzle, the gas leaked out during filling.

The front end with the fillercap.

The back end with the nozzle and stabilising fins, bended at the end to give rotation at the torpedo for stabilising it.

Bogdan.Manole · Oct 17, 2009, 03:56 PM

Hi everybody!

Very nice job MFR! ...But you didn't tell us how you start your torpedo.Are you using a magnetic switch?
How is it working? Distance?
I'm very curious!

Bogdan

MFR · Oct 17, 2009, 04:15 PM

Hello Bogdan,

You start them with pulling the endcap of the rear end, distance is depended on the amount of lightergas that you put inside the torpedo.
I've made already some testruns in the bath look for yourself.

Gastorpedo testrun 1 (0 min 20 sec)

Gastorpedo testrun 2 (0 min 19 sec)

Gastorpedo testrun 3 (0 min 20 sec)

CaptainNemo12 · Oct 18, 2009, 11:13 AM

That is one fast fish!!

Bogdan.Manole · Oct 18, 2009, 02:26 PM

Super!
MFR, have you also tried building torpedoes with electric motors?
I'm looking forward for a test run directly from your sub ..

Have you also thought of putting a war head in front of torpedo?

Thank you.

Bogdan

MFR · Oct 18, 2009, 02:52 PM

Bogdan,

I'am building the gastorpedo's not for myself, but for a friend of mine that has the Robbe type VII, for me i wanted to try if i could tackle this project.
For my own sub, a type VIIC, i already have working electric torpedo's,
about a warhead, inside the electric one's there is not enough weight left over to place one.
The gas torpedo's are working on lightergas, so explosions are not what i'am searching for, i've seen working examples, looks nice, but i have my own thought about warheads.
This is my vid about the electric one's, enjoy

Testrun torpedosystem (1 min 46 sec)

Greetings Manfred.

MFR · Oct 19, 2009, 05:03 PM

Next update on the build for gastorpedo's.

This is the gastorpedo i've build with all the components in sight.

Improved type of nozzle, the glue type didn't work well, after a few times it started to leak, this time used a round piece of plastick with a 1 mm hole drilled trough.

The plug i use for sealing off the nozzle, it has the pin as well a little O ring for sealing of the end.

It fits like this, the pin through the nozzle and the O ring around the little brass tube.

The launchtube, complete with connections for the torpedodoors and release mechanism for the torpedo.

The plug connected to the firingrod, there is a little rim that keeps the torpedo at his place.

If you pull at the rod the plug will come of and the torpedo is getting launched, next step which i'am still working on is to make a ajustable frame that can hold all four tubes.
Because i don't know the exact measurements of the inside of the Robbe type VII torpedoroom i'll have to make a frame that is adjustable in hight and width, i have to figure that out first.

Bogdan.Manole · Oct 22, 2009, 01:42 PM

Hi Manfred,

we are waiting for two days now....

)

Manfred, I'm very curious. Let's say, if the torpedo launching tube is flooded with water, why you still need something that pushes the torpedo out? If you start the electric motor of a torpedo it should self propel out if the launching tube is filled with water. Right? Have you tried? I followed your torpedo tutorial with great interest and I find your launching system so complicated. There should be better way...

Thank you.

Bogdan

Nemo · Oct 22, 2009, 02:05 PM

Bogdan,

This is not complicated at all! This is a very ingenious and simple system for working torpedoes! All that is required to launch the torpedo is to pull the pin. The escaping gas propels the torpedo forward and out of the sub.

Well done!

I really like your system!

Bogdan.Manole · Oct 22, 2009, 03:20 PM

Nemo,

I was talking about Manfred's electric driven torpedoes. Have you seen it?Please follow "One of the ways to build a electric torpedo" topic, a true demostration on how things should be done in modelling. But this gift is not for all unfortunatly...

The gas torpedo Manfred built is very simple and ingenious. I have a few questions regarding the project but I'm sure Manfred will upload new photos with the inner section of the torpedo.

Thank you.

Bogdan

MFR · Oct 22, 2009, 03:25 PM

Hello Bogdan

The push i use with the electric torpedo's is needed because my electric torpedo have bouyency, i've did a serie of tests with the launching tube.

1 Launch on the normal springaction way works well

2 Launching only with removal of the magnet works also, but when the sub is submerged the torpedo's get stuck against the upper part of the launchtube by the bouyency of the torpedo.

The advantage of the gastorpedo is that there is no bouyency at the start of the launch, Just like Nemo mentioned simply pulling the pin out will start the torpedo.
The advantage of the electric one is that the runningtime is longer and reloading the tubes is much easier, is don't have to open up the sub.
Simply cock the springs of the tubes, torpedo pushed inside and ready for a new run, max runningtime of the electric ones is 10 minutes, gas wil last about 10 sec on max load of gas.
About the progress on the launchtubes for the gastorpedo's, i've found the solution what i was searching for.
This weekend i'll put the intire system together, and try some launches inside the bath, still have to finish up 3 more gastorpedo's, the first one was more or less a prototype trying to get it working.
Will take some vids of the progress, and keep you all informed.

Greetings Manfred.

MFR · Oct 25, 2009, 09:41 AM

The first layer and second layer of the tubes are ready, also the ajustable frame is working.
Here are the pictures, see for yourself.

I've used the second layer to show how the adjustble frame works.

Standard straight.

Adjusted to the width of the torpedoroom, i can lock the position with the M3 bolts, also ajust the hight with the aid of the copper M3 thread

Front view of the tubes, next step will be building 3 more gastorpedo's, the plugs and the launchmecanism.

kry1001 · Oct 25, 2009, 11:33 AM

Hello Mainfred
The launch of the torpedo and you built torpedoes for the Robbe U-47 is great! I have a submarine U 47 from Robbe which I modified with a piston tank from Engel Pumps static. We also did functional periscoapele rotating antenna because of you, after you posted the video on youtube. From the beginning I want to thank you for the video posted by you and posted pictures of you. I have not yet managed to build Snorkel tube to rise, but further work on this. Torpedoes and torpedo launching system we wanted to build from the beginning but ... for a long time I thought to build torpedoes but we had difficulties in introducing the system of liquid gas in torpedo and torpedo device which keeps on Pending lansarii.De tube that greatly please tell me what you built torpedo diameter for this system, which is the length of torpedo and what software(plastic) is that there torpedo , which diameter is this software?
Thank you very much and look forward to your answer ..
Forgive me please for my English ..
Cristian

MFR · Oct 26, 2009, 01:12 PM

Hello Cristian,

The diameter of the torpedo is 13mm, total length 18 cm, the launchtubes are made from electricianpipe 16 mm outer diameter, 14 mm inner diameter.
Glad to hear that the vids from youtube helped you to make the extra things for your U47, the schnorkel is a tricky thing to build, i did that with the aid of a lathe.
On one of my vids (new wiring for my VIIC part 1) you can see how it's working, maybe it will help you to build one of your own.

Greetings Manfred.

Oct 17, 2009, 06:19 AM	#1
MFR Registered User Join Date: Sep 2008 Location: Netherlands Posts: 76	Gastorpedo's I'll start here a new buildingreport concerning the build about the gastorpedo's, and offcourse the launchingsystem. Be patient, the pics will follow soon, first have to sort out all the pics i've took during the build sofar.

Oct 22, 2009, 01:42 PM	#9
Bogdan.Manole Registered User Join Date: Sep 2009 Location: Bucharest, Romania Posts: 8	Hi Manfred, we are waiting for two days now....) Manfred, I'm very curious. Let's say, if the torpedo launching tube is flooded with water, why you still need something that pushes the torpedo out? If you start the electric motor of a torpedo it should self propel out if the launching tube is filled with water. Right? Have you tried? I followed your torpedo tutorial with great interest and I find your launching system so complicated. There should be better way... Thank you. Bogdan

Oct 22, 2009, 03:25 PM	#12
MFR Registered User Join Date: Sep 2008 Location: Netherlands Posts: 76	Hello Bogdan The push i use with the electric torpedo's is needed because my electric torpedo have bouyency, i've did a serie of tests with the launching tube. 1 Launch on the normal springaction way works well 2 Launching only with removal of the magnet works also, but when the sub is submerged the torpedo's get stuck against the upper part of the launchtube by the bouyency of the torpedo. The advantage of the gastorpedo is that there is no bouyency at the start of the launch, Just like Nemo mentioned simply pulling the pin out will start the torpedo. The advantage of the electric one is that the runningtime is longer and reloading the tubes is much easier, is don't have to open up the sub. Simply cock the springs of the tubes, torpedo pushed inside and ready for a new run, max runningtime of the electric ones is 10 minutes, gas wil last about 10 sec on max load of gas. About the progress on the launchtubes for the gastorpedo's, i've found the solution what i was searching for. This weekend i'll put the intire system together, and try some launches inside the bath, still have to finish up 3 more gastorpedo's, the first one was more or less a prototype trying to get it working. Will take some vids of the progress, and keep you all informed. Greetings Manfred. Last edited by MFR; Oct 25, 2009 at 09:41 AM.

Oct 17, 2009, 11:29 AM	#2
MFR Registered User Join Date: Sep 2008 Location: Netherlands Posts: 76	This was the start, using aluminum tubing and wood for the front and rear parts. After making some front and rear pieces on the lathe the first torpedo's emerged. Next thing to do was to make the fillercap for loading the torpedo, it's a regular fillercap from a gaslighter, a guy at our Dutch Forum has come up with this trick, inspired by his succes i also took a shot at it. Next step is to prepare the fillercap for the head of the torpedo, this is the second stage after removing the fillercap from the gaslighter. After preparing the fillercap i glued it inside a small tube, the tube complete with fillercap goes inside the head of the torpedo. Drilling the right size of hole inside the front end, and making it waterproof with a solvant. Done the same with the back end, and made the nozzle with a opening of 1 mm, drilled trough the filling of 2 component glue. During testing it revealed that this wasn't the good solution for the nozzle, the gas leaked out during filling. The front end with the fillercap. The back end with the nozzle and stabilising fins, bended at the end to give rotation at the torpedo for stabilising it.

Oct 17, 2009, 03:56 PM	#3
Bogdan.Manole Registered User Join Date: Sep 2009 Location: Bucharest, Romania Posts: 8	Hi everybody! Very nice job MFR! ...But you didn't tell us how you start your torpedo.Are you using a magnetic switch? How is it working? Distance? I'm very curious! Bogdan

Oct 18, 2009, 11:13 AM	#5
CaptainNemo12 RC sub dude Join Date: Nov 2004 Location: Montreal, Quebec, CANADA Posts: 202	That is one fast fish!!

Oct 18, 2009, 02:26 PM	#6
Bogdan.Manole Registered User Join Date: Sep 2009 Location: Bucharest, Romania Posts: 8	Super! MFR, have you also tried building torpedoes with electric motors? I'm looking forward for a test run directly from your sub .. Have you also thought of putting a war head in front of torpedo? Thank you. Bogdan

Oct 19, 2009, 05:03 PM	#8
MFR Registered User Join Date: Sep 2008 Location: Netherlands Posts: 76	Next update on the build for gastorpedo's. This is the gastorpedo i've build with all the components in sight. Improved type of nozzle, the glue type didn't work well, after a few times it started to leak, this time used a round piece of plastick with a 1 mm hole drilled trough. The plug i use for sealing off the nozzle, it has the pin as well a little O ring for sealing of the end. It fits like this, the pin through the nozzle and the O ring around the little brass tube. The launchtube, complete with connections for the torpedodoors and release mechanism for the torpedo. The plug connected to the firingrod, there is a little rim that keeps the torpedo at his place. If you pull at the rod the plug will come of and the torpedo is getting launched, next step which i'am still working on is to make a ajustable frame that can hold all four tubes. Because i don't know the exact measurements of the inside of the Robbe type VII torpedoroom i'll have to make a frame that is adjustable in hight and width, i have to figure that out first.

Oct 22, 2009, 02:05 PM	#10
Nemo Registered User Join Date: Mar 2004 Location: Victoria, BC, Canada Posts: 155	Bogdan, This is not complicated at all! This is a very ingenious and simple system for working torpedoes! All that is required to launch the torpedo is to pull the pin. The escaping gas propels the torpedo forward and out of the sub. Well done! I really like your system!

Oct 22, 2009, 03:20 PM	#11
Bogdan.Manole Registered User Join Date: Sep 2009 Location: Bucharest, Romania Posts: 8	Nemo, I was talking about Manfred's electric driven torpedoes. Have you seen it?Please follow "One of the ways to build a electric torpedo" topic, a true demostration on how things should be done in modelling. But this gift is not for all unfortunatly... The gas torpedo Manfred built is very simple and ingenious. I have a few questions regarding the project but I'm sure Manfred will upload new photos with the inner section of the torpedo. Thank you. Bogdan

Oct 25, 2009, 09:41 AM	#13
MFR Registered User Join Date: Sep 2008 Location: Netherlands Posts: 76	The first layer and second layer of the tubes are ready, also the ajustable frame is working. Here are the pictures, see for yourself. I've used the second layer to show how the adjustble frame works. Standard straight. Adjusted to the width of the torpedoroom, i can lock the position with the M3 bolts, also ajust the hight with the aid of the copper M3 thread Front view of the tubes, next step will be building 3 more gastorpedo's, the plugs and the launchmecanism.

Oct 25, 2009, 11:33 AM	#14
kry1001 kry Join Date: Feb 2009 Location: Romania, Slobozia-Ialomita Posts: 3	Hello Mainfred The launch of the torpedo and you built torpedoes for the Robbe U-47 is great! I have a submarine U 47 from Robbe which I modified with a piston tank from Engel Pumps static. We also did functional periscoapele rotating antenna because of you, after you posted the video on youtube. From the beginning I want to thank you for the video posted by you and posted pictures of you. I have not yet managed to build Snorkel tube to rise, but further work on this. Torpedoes and torpedo launching system we wanted to build from the beginning but ... for a long time I thought to build torpedoes but we had difficulties in introducing the system of liquid gas in torpedo and torpedo device which keeps on Pending lansarii.De tube that greatly please tell me what you built torpedo diameter for this system, which is the length of torpedo and what software(plastic) is that there torpedo , which diameter is this software? Thank you very much and look forward to your answer .. Forgive me please for my English .. Cristian

Oct 26, 2009, 01:12 PM	#15
MFR Registered User Join Date: Sep 2008 Location: Netherlands Posts: 76	Hello Cristian, The diameter of the torpedo is 13mm, total length 18 cm, the launchtubes are made from electricianpipe 16 mm outer diameter, 14 mm inner diameter. Glad to hear that the vids from youtube helped you to make the extra things for your U47, the schnorkel is a tricky thing to build, i did that with the aid of a lathe. On one of my vids (new wiring for my VIIC part 1) you can see how it's working, maybe it will help you to build one of your own. Greetings Manfred.