Buoyancy Check And Weight Adjusting; Launch; Recovery - THUNDER TIGER Neptune SB-1 Instruction Manual

OPERATING
BUOYANCY CHECK & WEIGHT ADJUSTING
Before using the submarine for the first time, check its correct buoyancy.
Fill a bath tub with cold water and put the submarine into it
With the ballast bag completely empty, the submarine should float keeping the turret and a thin part of the
outer hull above the waterline. You can change the weight parts to get the suitable position.
Check if the submarine has a good trim, staying horizontal and without listing. If necessary adjust the ballast
in the submarine keel. And, adjust the position of the weight parts to make the submarine level without pitch
up or down.
Please remember that different water conditions (for example, bath tub, swimming pool or lake) have an influence
on the submarine trim due to different water density. Perform a buoyancy check any time you want to use the
submarine in new places.
Ballast empty

LAUNCH

Find a good launch position, with the possibility to stand stable with no risk of falling into the water. The water
surface should be easily reachable and must not be too low.
Insert the handle into the holes of the external hull. Be sure that the hooks are connected to the metal rod of
the inner hull and not only to the outer plastics .
Lift the sub and gently place it into the water.
Wait until the front nose and the rear cone are totally full of water. These are free-flood compartments and it's
normal they become totally full of water, no large air bubble should remain inside them.
At this point, disconnect the handle.
NOTE: Pay attention not to let the handle fall into the water, because it will sink!
Start piloting your Neptune SB-1.

RECOVERY

Start the pump in order to have the ballast bag completely empty
Pilot the sub along the side of the swimming pool or lake, in a reachable position.
Connect the hooks handle to the lifting points inside the slots of the hull. Be sure to clamp the inner metal rod
and not only the plastic hull.
Lift the submarine out of the water. During this phase, it will be significantly heavier, because of the water trapped
between inner and outer hulls. Then, this water will be discarded and the operation will be simpler. Place the
sub on a horizontal surface
Switch the submarine and the transmitter off.
Have a quick inspection of the hull and check no part has been damaged or lost.
80% Ballast full 100% Ballast full