Here are some more advancements that I have maid to the XXI.
First the main shaft cooling system for the motors,note the 2 indidendent systems since there are 2 seperste ESCs and if one is in reverse well you know what would happen to the drive.
The 2 small coils are the heatexchangers,this is a sealed system with a few drops of antifreez to lube the pumps.
Air craft 3/16th aluminum tubbing is used for its lightness and ease of bending and it fits the large fueline tubbing perfectly.
The pumps are driven by the Lego drive shafts and U joints and bearring blocks all lubricated by water.
I have used this type of setup in other subs and have not had to replace a sigle Lego component due to wear!Good stuff and very cheap.
Also I would like to say that this sub was the most easest to ballance I have ever done.It took 2 hours to obtain a level serfaced and level submerged nuetral bouyant state and serfaces level.!
With just one bar of supplied lead of which there was 4 the keel waight was laid and then some foam,by the way I use marine grade foam from of all sources ,body boards I buy at garage sails for usualy 3 to 5 bucks!
That stuff is supper strong durrable and easy to cut and totaly closed celled.
In the picture you can see the method for ballanceing with rubber bands.There are 2 longer foams inside just aft of the forward dive planes.
Also in the pics is the hydraulic retracting dive plnes,wait till you see how smoth and realisticly they operate.The pump is in the acsses area in the bow on the keel.The syrige is for the counter volume of water and is set to lock when the planesare retracted while the ram at the top that operates the planes also locks at the bottom when fully deployed,no switches no electronics except for the blue ESC used to reduce and switch the current for the pump at full 12 volts the pump moves the planes too fast. Simple system and so sweet to watch operate right down to the sound.The green fluid is the antifreez and water.
I must say that this sub dives like an elivator and serfaces nice and slow very scale like on the new pump system I have developed and am very happy with its performance.
Later Ill show the guts a real eyefull.
Also the masts go up and down now and the turrets I am happy to say rotate in both directions in variable speeds,there geared together with a Legos gearboxes U joints and drive shafts and feature a break away joint.
The drive for the guns are located in the secound WTC maid from a Foccus free camara case,high qualty case that has alot of things we can use ,like knobs and switches that are all made waterproof ,see thrugh and cost get this 9.95$!
I just installed the diveplane servo and gun drive servo,the later is a microservo that I hacked or modified so that it can rotate 360 degrees on comand.Just remove the gear stop on the large gear and glue the potentiometer so that it does not rotate in the center position.
A radio controlled mini graer motor is obtained in this way,then connected to the Legos frive train and your OFF.
The entire sub uses the same highpowered micro servo from TOWERPRO and so far are very strong stable and inexpensive.Get them in bulk off Ebay directly from China.
What is next are the wireing of the connector that will be installed inbetween the pumps,a military cannon plug will be used a 14 gold pin type.
Enjoy the pics and any questions just ask.
Dave Amur Ship Yard