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K-141 Kursk (by Ceravyn)
v1.5 RC ready
Assembly instructions
Printed parts required
Hull_rear (or hull_rear cut 1 & 2) ........................................................ 1pc
Hull_main (or hull_main cut 1 & 2) ........................................................ 1pc
Hull_front …........................................................................................ 1pc
Hull_bow …........................................................................................ 1pc
Prop_5blade …........................................................................................ 2pcs
Propshaft_seal …............................................................................ 2pcs
Prop_gear …........................................................................................ 2pcs
Rear_hatch_seal …............................................................................ 1pc
Rear_hatch …........................................................................................ 1pc
Rear_side_plane …............................................................................ 2pcs
Rear_top_plane …............................................................................ 1pc
Rear_small_plane …............................................................................ 4pcs
Rudder_seal …........................................................................................ 1pc
Rudder_shaft_joint …............................................................................ 1pc
Rudder …........................................................................................ 1pc
Rudder_pushrod …............................................................................ 1pc
Motormount ….........…............................................................................ 1pc
Motor_gear …........................................................................................ 1pc
Tower (high or low detail) …................................................................. 1pc
Missile_silos …........................................................................................ 2pcs
Missile_hatch …........................................................................................ 2pcs
Front_plane_pushrod …................................................................. 1pc
Front_hatch_seal …............................................................................. 1pc
Front_hatch …........................................................................................ 1pc
Front_plane_joint …............................................................................. 1pc
Front_plane …........................................................................................ 2pcs
Front_plane_seal …............................................................................. 2pcs
Stand_plate …........................................................................................ 2pcs
Stand_connecting_rod …................................................................. 1pc
Non-printed parts required
2x14mm rod …........................................................................................ 1pc (rudder)
3x70mm rod …........................................................................................ 2pcs (propellers)
2x62mm rod …........................................................................................ 1pc (front planes)
3x55mm rod …........................................................................................ 1pc (motor gear)
Bearing 10x3x4 (out-in-depth) …..................................................... 2pcs (propeller shafts)
M3 screws …........................................................................................ 4pcs
M3 nuts …........................................................................................ 4pcs
Thin nails or similar thin studs …..................................................... 4pcs
Tools required
Glue
Drill (to ream the holes into proper diameter)
Possibly sandpaper (depends about printing quality)
Grease (optional but recommended)
2-sided tape (for mounting battery etc)
Electronics used in testing
DC-motor 2-6V …............................................................................ 1pc
XTD-1109HB Digital Servo …................................................................ 2pcs
Servo tester …............................................................................ 1pc
5V power supply …............................................................................ 1pc
I went with cheapest possible solution as I don't currently have lots of cash to throw in for this
project, but as motor mount is detachable it's easy to modify it to fit any motor out there.
Servo mounts are sized to accept 23mm x 13mm x 25mm servos so most of the micro/mini servos
should fit easily.
Main hull has lots of empty space to fit battery and RC electronics in any configuration necessary.
Please keep in mind that water + electricity is not a good combination. I am not in any way
responsible for any damages or injuries caused by using this build. This is an experimental proofof-
concept build and making it work may require additional work in sealing the hull to be watertight
with hot-glue, silicone or similar sealing materials.
Propeller shaft assembly
1. Push propeller shaft seals into their holes. (optional but recommended: Apply grease inside
the seal and into the propeller shaft tunnel to further improve water-tightness)
2. Push propeller shaft bearings into their holes.
3. Glue propeller shaft gears to the end of the propeller shafts
4. Insert propeller shafts with their gears through the bearing into the shaft tunnel
5. Glue propellers into the end of the propeller shafts
Notes:
You may need to ream the shaft tunnels into the proper diameter (3mm) depending on the print
quality of your printer.
Applying grease into the shaft tunnels further decreases chance of water entering inside the hull
via the propeller tunnels. This may not be necessary, but due to layers in most of the 3D printed
parts it is highly recommended. Silicone grease was tested to work well in this application.
Rudder assembly
1. Insert rudder shaft seal into its hole (optional but recommended: Apply grease inside the
seal to further improve water-tightness)
2. Glue the rudder shaft into the shaft joint
3. Push the shaft through the rudder seal
4. Glue the rudder to the end of the rudder shaft to complete the assembly
5. Connect rudder pushrod to the shaft joint
Notes:
Just as with propeller shaft tunnels, silicone grease inserted into the rudder hole and seal further
helps to keep water out from the hull.
To keep rudder pushrod from detaching from the shaft joint, you may drill a hole through the shaft
joint and insert a screw with washer to keep the pushrod in place. However this was not necessary
in the test build, and pushrod was kept neatly in place when it was screwed to the servo arm only.
Completing the powertrain
1. Insert motor gear into the motor shaft, push the motor shaft into its hole between the propeller
shafts. Align motor gear to match the propeller gears and mark the placement with a piece of tape.
2. Remove motor gear with its shaft and glue the motor gear to its place marked in previous step.
3. Fix motor gear shaft into the motor with glue or screw connection.
4. Insert motor with its shaft into the motor mount and secure with screws.
5. Insert motor mount inside the rear hull and secure with two M3 screws.
Notes:
You may want to add some grease into the gears to reduce noise and smoothen the power
transmission. Connection from rudder shaft joint to the servo rod can also be lubricated to smooth
out the operation, especially if printing quality isn't the best.
Rear hull final assembly
1. Glue the rear planes to their places. These act as stabilizers in this model so make sure they
are fixed as horizontally as possible.
2. Glue the small planes to their places.
3. Glue the top plane to its place
4. Insert maintenance hatch seal and attach the maintenance hatch to its place. Depending on
the application and water-tightness required from the top of the hull, you might secure it
with M3 screw or rely on the fastening clip only.
5. Insert rudder servo to its place between the mounting columns and connect the pushrod
with a screw to its arm
Notes:
The maintenance hatch seal is meant to be splash resistant. It is not meant to provide fully watertight
application. If the vessel turns upside-down water will leak through this hatch. If more watersealing
is needed, secure the hatch to its place with hot glue or similar sealing.
You may need to sand the mating surfaces of the tail planes to form a smooth surface for gluing
the planes to.
Main hull exterior assembly
1. Glue the missile silo plates into their places in the sides of the main hull
2. Insert small studs (I used pins cut from thin nails) to the missile bay hatch rear mounting
holes and connect the rear end of the hatch to the hull.
3. Aligning the front mounting holes, push another set of small pins through the hull wall to
connect the hatch and secure it in place.
4. Glue the bridge & command tower to its place.
5. Glue the small side planes to their mating surfaces.
Notes:
You may need to sand the missile bay hatches a little to make them close properly, especially if you
have printed them thin side facing the build platform like I did.
Main hull interior assembly (optional)
1. Insert servo for controlling the front planes. You may fix the pushrod now, or in later phase.
This is purely visual and the front planes do not effect to the movement of the vessel in any
way so if you don't have extra servo's available I recommend skipping this assembly
entirely.
2. Insert battery and other necessary electronics to the empty space within the main hull.
Notes:
Try to keep components at the center to stabilize the weight distribution. Rear planes do stabilize
small differences in weight distribution but for example mounting battery to the starboard side
and leaving the opposing side empty is not a good idea :)
There is no mounting points for battery as I tested this with wired controls and DC power supply,
but 2-sided tape is a good solution.
Front hull assembly
1. Insert plane shaft seals into their holes, push the plane control rod through one side of the
hull.
2. If front plane servo is attached, insert the shaft joint to the plane shaft and push the rod
through the hull.
3. If front plane servo is attached, connect the servo pushrod to the shaft joint and glue the
shaft joint to its correct placement.
4. Glue the front planes to the both ends of the shaft. Make sure they are both attached in
same angle, since the rod tilts both at the same time.
5. Insert the front maintenance hatch seal and attach the maintenance hatch to its place.
Secure the hatch, like the rear maintenance hatch, either with the fastening clip only, or
with additional screw.
Notes:
Like with the rear hatch, the front hatch seal is splash resistant only. It isn't meant to provide 100%
waterproofing. If this is necessary, further fix the maintenance hatch with glue.
If you don't want front planes to move, you can seal the shaft holes shut and simply attach the
front planes to their mounting points with glue.
Finishing steps
Securely glue all the parts of the hull together. Make sure the seams are glued properly to avoid
leaks, and all the wiring and other parts you may need access to are brought close to the
maintenance hatches so you don't need to take it completely apart if some servo wire comes
loose.
There is also a display stand provided, this is a simple three-piece assembly. Glue the rod between
the two side plates and you're done.
That's it. You have now built your very own K-141 Kursk nuclear submarine.
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发表于 2021-8-24 13:12
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