Comment on SkyLarc - Helicopter MK2 by eRe4s3r

Generally you'd have a gear shaft extending from the body or engine that uses a U joint or differential joint to change that rotation to vertical, either underneath the fan or over it. (for the side ones) basically you'd use a gear to turn the force 90 degrees.

Another detail I should mention is that classically with a ducted fan approach...the point of a ducted fan is to channel the air into a narrow opening thus keeping the thrust of the fan blades concentrated and low to the lifting point. Your fan ducts are basically the same depth as the blades, which mean that as soon as the thrust leaves the blades, it spreads out in a cone, similar to a regular fan. Look up ducted fans and you'll see what I mean.

Also looking at your design more closely...instead of pitching the blades, you could pitch the entire ducted fan assembly...to include opposite pitches to assist in yaw action.

Again though...All of this stuff is merely real physics being applied to a fictitious design...your modelling is quite well done!