LEGO 8856 PDF

View LEGO instructions for Rescue Helicopter set number to help you build these LEGO sets. Set , released in , is the best helicopter ever released in the Technic line in my opinion. It’s big and it’s functional. This set is similar to a Sikorsky HH- Find great deals for Lego Technic Whirlwind Rescue (). Shop with confidence on eBay!.

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At the end of the axle is a ball joint which connects to another flex cable.

LEGO Rescue Helicopter Instructions , Technic

The main gear pivots forward via a 24 tooth crown and spur gear. Inside the swashplate is a four blade rotor part.

The rotor axle drives a spherical ball gear. If a real helicopter did this it would risk striking the rotor against the frame. Click the image to download the LDraw file of this model.

For example, the leading and trailing blades may be at 10 degrees of pitch, while the port and starboard blades are at 5 and 15 degrees respectively.

In both the extended and retracted positions the gear rests against a hard stop.

LEGO Technic Rettungshubschrauber (8856)

The next axle pivots a lift arm which deploys the winch boom. Lateral motion of the stick rotates an axle which runs aft. The final gear ratio is Each gear 856 a little over 90 degrees.

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A set of 14 tooth bevel gears drive the second axle which works as a cable drum. Click for an animation of the rotors in motion. The control of the cyclic is from a stick at the pilot’s position. Landing Gear The 3 point landing gear retracts using another crank on the port oego. A pair 88556 simulated turbine engines are nestled beneath the main rotor head.

Here another set of 14 tooth bevel gears drives the 4 blade tail rotor. The second crank attaches to a 16 tooth spur gear used as a ratchet plate.

This flex cable attaches to a ball joint on oego side of the swashplate. Click for an animation of the cable in motion. This crank drives a set of 14 tooth bevel gears giving the main rotor a ratio of 1: Click for an animation of the cyclic in motion.

Whirlwind Rescue | Brickset: LEGO set guide and database

The crank turns a worm gear which mates with a 24 88856 spur gear. Because of the shape of the gear, the rotor can pivot on two axes while still rotating. Click for an animation of the landing gear in motion. Rotating main and tail rotor, ratcheting winch on 885 boom, retractable landing gear, working two axis cyclic. The first crank turns a worm gear which drives a 16 tooth spur gear. Rescue Winch A pair of cranks on the starboard side operate the rescue winch on the port side.

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The flex cable runs up to a link which lifts the swashplate using a suspension control arm! Cyclic Pitch A number of new parts made a simulated cyclic system possible.

Rotors The rotors’ rotation is driven by an input crank on 886 left side.

Lego Technic Whirlwind Rescue (8856)

The ball joints also keep the swashplate from rotating. The spur gear drives an axle which runs both forward and aft.

Real helicopter cyclic works by changing the pitch of individual blades as they rotate using a swashplate. Ldraw file courtesy of Benjamin Wendl.

Click for an animation of the winch boom deploying. lwgo

The nose gear retracts forward via a set of 14 tooth bevel gears. There is one flex cable and sleeve for each axis.