Helicopter with 4 sets of propellers

Here is a model which I don't know if it exists or not, but my imagination came up with the design.

You can see the shape of the helicopter is kind of like the LEGO Police Heavy Duty Helicopter, only this design  heavy duty in weapons.

The rear

All the propellers spin together by a simple gearing system beneath the  model.

The interior is split into 2 sections: Monitor room, and skydiving launch room. 

A closer look at the control panels.

I wanted to use strings in the model, but in LEGO Digital Designer, strings weren't available in the mode I was using. The chains will make do.

Mansion

Since I didn't post anything for quite a while, I decided to build something big. A lot of the details and style of the house is inspiration from Jaystepher; who can be seen on YouTube and Facebook.

This house contains 3 floors, 4 separate parts, and 4212 pieces (The biggest model in terms of number of pieces).

Here is a mansion. From far away it doesn't even look like it's made of LEGO bricks. Since it was made in LEGO Digital Designer, all the same colors of bricks are stuck together. The exterior has detailed corners, textured chimney, tucked in windows, and roof in the shape of an arch.

The interior of the first floor has a family room, corridor, kitchen, spiral staircase, tiled floors, and restroom.

Living room details include armchair, sofa, bookcase, TV, glass table, and piano.

corridor and kitchen details have a spiral staircase, drawers, stove,cupboards, and island in the middle of kitchen

The restroom has a toilet, and drawers.

Second floor details include balcony, angled walls, master bed and bathrooms, hallway, and guest bed and bathrooms.

Master rooms feature 6x6 bed, drawers cupboards, mirror (Hard to see), Dresser (Hard to see) and Chimney (Behind gray stonework).

Hallway includes rails, and small balcony to first floor.

Guest room has a bunk bed, and TV

Guest Bathroom has a toilet, sink, and bathtub.

The rear of the mansion has an angled wall. the roof follows the angle of the wall. 

Inside the very top floor is a bowling alley. with lots of fun to roll bowling balls into pins.