Here is a write up about the benifits and diagrams of water cooling a Sub ,it can be done with just about every sub desighne out there and In my opinion is important to increase the run time and longevity of a motor.
Its done on my subs with regular can type motors that are quite efecient voltage to speed and torqe ratios or on cordless drill and trany installations that that are used in large Nuke subs 5ft or larger,where more power is required to move a larger cross section of mass threw the water at a high scale operational speed like the full size subs must do.
The Alfa was the fastest sub in the world and had the power plant to take advantage of the hull desighne to in affect "out run" Nato torpedoes and that was a big shock to Nato that a sub could not be hunted down with available weapons,emergency programs where developed to make faster torpedoes and submarines to deliver them and to go as fast or at least as fast as the Alfa.
Well thats where cooling comes in ,heat exchangers and special heat tranferring exotic liquids where experimented on both sides of which the Russians came up with a Liquid Bithmus metal system that had to be maintained at a set temp or it would solidify,ruining the reactor,it happened and they learnt there lesson but they did get a super powerfull reactor system.
In Rc Subs most of the Casings are made from plactics that do not efectivly conduct or transfer heat or outside cold inward.
In effect the motor and ESC is issolted thermaly from the water and heat will build up in a sealed container where no fresh air is circulating,even if the motors are perfectly matched to the prop and sub there will be heat generated,maybe not in some casses to cause a problem but its there and not being dealt with.
On my larger subs the high power out put of a drill motor trany set up matched to the high pitch prop as on the Alfa or on any other large sub made it a good idea to water cool it.
It's easy to build, simple and pays off in many ways,a pump driven by the motor circulates a small amount of water and antifreez of abuot 3 table spoons and 1cc of antifreez,the antyfreez lubes and elliminates corotion of the alluminum tube which is minor and is maid to eliminate heat by transfer.
Just two passthrughs are needed for the 3/16ths dia miter aircraft grade coil tubes ,about .30 cent per foot,to enter the casing and are one piece , no flexable materials in the casing wall like silicone tubbing,only on the "inside" is it used to connect the 2 coils together. Marine Goop is used to seal them.
This system is called the "Sealed cooling Ststem" and thats what makes it so neat and eligant ,there is no way water is going to get into the casing if a tube is blown off.Pressure is nell becase there is no absolute abstruction or restricktion nor can one inter the coils.And the pump is only pumping when the drive is in use .And the amount spilled well no biggie and has not happened yet.
Pumps are made with oilite bushings and a special lipped shaft seal on a stainless shaft directly off the motor or driven off the main shaft,I leave pump making to the experts.
Vertauly no maintenace just change the fluid once a year and check hoses and that the pump is not leaking,so far I haven't had to change a pump or motor for that manner in any of my subs that have this system for many years now.
One might say why, its not necessary and complex, it might seem that way but ,your car has it ships have it,fullscale subs,pleasure boats Nuclear Power plants food processing even Astronaught space suits .any machine or process that has to remove heat even if its just a little will have great benifits.
I like the saying "a happy motor is a cool one" and its seen on RC scale and race boats scale or not or in RTR kits by major manufacturers that know the benifits,its just a better way to keep a" cool motor running cooler",no unmatched hot windding motors that where miss matched to there drives.
I can prove it in real time Telemetry now with the on board Eagle Tree System now being deployed on my subs,see" Telemetry For your Sub" for more details on this very revolutionary tool to mnitor the most important parts of your sub,just like the engineers do with alot more bucks.
I did prove it to my self when I first installed the Telemitry and was amazed at the difference in temperatures from ambient to normal cruise to full sustained speed or flank scale speed.
The diferrence was about 7 degrees and rissing fast if I did not stop the test and reconnect the cooling system to drop back to 99 degrees f.One might think wow he runs hot motors so thats why he uses watercooling ,not true I used to not run watercooling and was always amazed at the warm inner air of the casing when I opened the casing after a long run,I had to find some way to eliminate the heat build up.
Even on a very "fuel" efecient WWII sub hull like a Type XXI or Type VII the heat will still build up ,not to a level that will damage the motors but it is still there bringing down the efecincy of the motors that are also running side by side and drawing heat from each other with no way to diassapate it except into the surrounding air of the casing.
Now if one was to have say a stainless steel casing and a motor mounted drectly to that frame inner suport that is in contact wth the casing then a clear path of dissapation is achieved to the water and the heat is extracted,simple thermal dynamics applied to a RC Sub.
No pumps exetra and very simple desighne,I did that on my Alfa and water cooled it any way.
Please don't think that this is the best or only way to do it and that's it ,no there are other ways also and I would love to see them work but this is my way ,its cheap relliable and very cool method of an extra "piece of mind and assuarance "that like full size Marine vessles have been enjoying for many years now why can't we ?.
Please don't take my advice as a sales pitch.
Dave Amur Sub Yard
Its done on my subs with regular can type motors that are quite efecient voltage to speed and torqe ratios or on cordless drill and trany installations that that are used in large Nuke subs 5ft or larger,where more power is required to move a larger cross section of mass threw the water at a high scale operational speed like the full size subs must do.
The Alfa was the fastest sub in the world and had the power plant to take advantage of the hull desighne to in affect "out run" Nato torpedoes and that was a big shock to Nato that a sub could not be hunted down with available weapons,emergency programs where developed to make faster torpedoes and submarines to deliver them and to go as fast or at least as fast as the Alfa.
Well thats where cooling comes in ,heat exchangers and special heat tranferring exotic liquids where experimented on both sides of which the Russians came up with a Liquid Bithmus metal system that had to be maintained at a set temp or it would solidify,ruining the reactor,it happened and they learnt there lesson but they did get a super powerfull reactor system.
In Rc Subs most of the Casings are made from plactics that do not efectivly conduct or transfer heat or outside cold inward.
In effect the motor and ESC is issolted thermaly from the water and heat will build up in a sealed container where no fresh air is circulating,even if the motors are perfectly matched to the prop and sub there will be heat generated,maybe not in some casses to cause a problem but its there and not being dealt with.
On my larger subs the high power out put of a drill motor trany set up matched to the high pitch prop as on the Alfa or on any other large sub made it a good idea to water cool it.
It's easy to build, simple and pays off in many ways,a pump driven by the motor circulates a small amount of water and antifreez of abuot 3 table spoons and 1cc of antifreez,the antyfreez lubes and elliminates corotion of the alluminum tube which is minor and is maid to eliminate heat by transfer.
Just two passthrughs are needed for the 3/16ths dia miter aircraft grade coil tubes ,about .30 cent per foot,to enter the casing and are one piece , no flexable materials in the casing wall like silicone tubbing,only on the "inside" is it used to connect the 2 coils together. Marine Goop is used to seal them.
This system is called the "Sealed cooling Ststem" and thats what makes it so neat and eligant ,there is no way water is going to get into the casing if a tube is blown off.Pressure is nell becase there is no absolute abstruction or restricktion nor can one inter the coils.And the pump is only pumping when the drive is in use .And the amount spilled well no biggie and has not happened yet.
Pumps are made with oilite bushings and a special lipped shaft seal on a stainless shaft directly off the motor or driven off the main shaft,I leave pump making to the experts.
Vertauly no maintenace just change the fluid once a year and check hoses and that the pump is not leaking,so far I haven't had to change a pump or motor for that manner in any of my subs that have this system for many years now.
One might say why, its not necessary and complex, it might seem that way but ,your car has it ships have it,fullscale subs,pleasure boats Nuclear Power plants food processing even Astronaught space suits .any machine or process that has to remove heat even if its just a little will have great benifits.
I like the saying "a happy motor is a cool one" and its seen on RC scale and race boats scale or not or in RTR kits by major manufacturers that know the benifits,its just a better way to keep a" cool motor running cooler",no unmatched hot windding motors that where miss matched to there drives.
I can prove it in real time Telemetry now with the on board Eagle Tree System now being deployed on my subs,see" Telemetry For your Sub" for more details on this very revolutionary tool to mnitor the most important parts of your sub,just like the engineers do with alot more bucks.
I did prove it to my self when I first installed the Telemitry and was amazed at the difference in temperatures from ambient to normal cruise to full sustained speed or flank scale speed.
The diferrence was about 7 degrees and rissing fast if I did not stop the test and reconnect the cooling system to drop back to 99 degrees f.One might think wow he runs hot motors so thats why he uses watercooling ,not true I used to not run watercooling and was always amazed at the warm inner air of the casing when I opened the casing after a long run,I had to find some way to eliminate the heat build up.
Even on a very "fuel" efecient WWII sub hull like a Type XXI or Type VII the heat will still build up ,not to a level that will damage the motors but it is still there bringing down the efecincy of the motors that are also running side by side and drawing heat from each other with no way to diassapate it except into the surrounding air of the casing.
Now if one was to have say a stainless steel casing and a motor mounted drectly to that frame inner suport that is in contact wth the casing then a clear path of dissapation is achieved to the water and the heat is extracted,simple thermal dynamics applied to a RC Sub.
No pumps exetra and very simple desighne,I did that on my Alfa and water cooled it any way.
Please don't think that this is the best or only way to do it and that's it ,no there are other ways also and I would love to see them work but this is my way ,its cheap relliable and very cool method of an extra "piece of mind and assuarance "that like full size Marine vessles have been enjoying for many years now why can't we ?.
Please don't take my advice as a sales pitch.
Dave Amur Sub Yard
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