UPD 06.05.2019 - Android version was removed.
Hello!
This mod allows you take aim like in War Thunder.

EXAMPLE TANK 1

EXAMPLE TANK 2

ROTATORS

If for some reason you can not download a mod from the site, the link to google drive:
PC: LINK
Android: LINK

TUTORIAL:

Block attributes:

Pitch following speed-speed of following the cannon for the camera along a vertical axis.
Yaw following speed-speed of following the turret for the camera along a horizontal axis.
Pitch stabilizer sensivity-sensitivity of the vertical stabilizer.
Yaw stabilizer sensivity-sensitivity of the horizontal stabilizer.
Jittering compensation- it is the parameter, which is reccomended to set 0.
If you have fulfilled the all requirements for the correct work of the mod,if you have tryed to change the all other parameters, and by the unknown problem your cannon is jittering along horizontal axis, then try to increase by the little steps "jittering compensation".
X Sensivity-sensitivity of the mouse on the horizontal axis.
Y Sensivity-sensitivity of the mouse on the vertical axis.
Invert X-inversion of the mouse along the horizontal axis.
Invert Y-inversion of the mouse along the vertical axis.
Horizontal limit speed-coefficient limiting the maximum speed of rotation of the tower.
Vertical limit speed-coefficient limiting the maximum speed of elevation / lowering the cannon.
Cannon positive angle limit-coefficient specifying the maximum elevation angle of the cannon. The unit of measure - degrees.
Cannon negative angle limit-coefficient specifying the maximum lowering angle of the cannon. The unit of measure - degrees.
Mode on/off- enable or disable "Tank aiming" mode.
Aim- enable or disable aim. It works when the "Tank aiming" mode is active.
Zoom in -approach the camera at sight from the 3rd person (when Aim is off) and optical magnification at sight from the 1st person (when Aim is on).
Zoom out -distancing the camera at sight from the 3rd person (when Aim is off) and optical reduction at sight from the 1st person (when Aim is on).
Activate mouse-activation of the mouse when the mode "Tank aiming" is active. The cursor is shown only when the key is pressed.
Aim type-type of aim. At the moment there are two types of aim.
Camera height- camera height when "Aim" is disabled. When "Aim" is enabled, camera height is 0. The camera height does not take into account vertical parralax. Increase this attribute entails vertical parralax error.
Rendering range –the visibility limit when the mode "Tank aiming" is active. The unit of measure - meters.

The available keys, which you can to assign Mode on / off, Aim, Zoom in, Zoom out, Activate mouse via XML editor, are indicated inside the quotation marks:

"Q","W","E","R","T","Y","U","I","O","P","A","S","D","F","G","H","J","K","L",
"Z","X","C","V","B","N","M","Num1","Num2","Num3","Num4","Num5",
"Num6","Num7","Num8","Num9","Num0","Mouse0","Mouse1","Mouse2",
"Mouse3","Mouse4","Mouse5","Mouse6","LeftShift","LeftControl","LeftAlt",
"RightShift","RightControl","RightAlt","CapsLock","Tab".

Approach and distancing of the camera can be assigned to the mouse wheel- "ScrollWhell". And "ScrollWhell" should be assigned as Zoom in, and Zoom out.

I know about problem of a little jittering along vertical axis. This is a technical issue. If this can be fixed, I will update the mod. Also, you can see this jittering, when your tank strictly horizontal relativity ground.

Requirements for the correct work of the mod:
1."Rotator" from the "Gizmos" section should be used for rotation of the turret and the cannon.
2. The speed of the rotators should be 200%. Angle of rotation for the rotator of both-turret and cannon-must be 100 degrees.
3. If the "Rotation" of the turret rotator is 0.0.0, the rotation inversion in the Part Properties of the rotator must be turned on.
4. If the "Rotation" of the cannonrotator is 0.0.270, the rotation inversion in the Part Properties of the rotator must be turned off.
5. The values of the min and max attributes of the rotators in the InputController category in the XML editor must be -1 and 1, respectively.
6. The Tank aiming block must be on the cannon and its longitudinal axis must be parallel to the longitudinal axis of the cannon.
7. Rotation axes: VTOL for turret rotator and Trim for cannon rotator.
8. For the correct work of the stabilizer, the main cockpit must be located in the hull, and not in the turret or cannon of the tank.

Enjoy!

Updates:
Ver.0.85 UPD. Fixed little problem with example tanks: jittering compensation is 0 default.
Ver.0.85: Added new parameter "Jittering compensation".
Android version is added, but I do not guarantee correct work of mod.