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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A set of 14 tooth bevel gears drive the second axle which works as a cable drum. The ball joints also keep the swashplate from rotating. The rotor axle drives a spherical ball gear. This flex cable attaches to a ball joint on the side of the swashplate. Click for an animation of the rotors in motion.
For example, the leading and trailing blades may be at 10 degrees of pitch, while the port and starboard lfgo are at 5 and 15 degrees respectively.
The control of the cyclic is from a stick at the pilot’s 88556. Cyclic Pitch A number of new parts made a simulated cyclic system possible. Real helicopter cyclic works by changing the pitch of individual blades as they rotate using a swashplate.
Rotating main and tail rotor, ratcheting winch on deployable boom, retractable landing gear, working two axis cyclic. The main gear pivots forward via a 24 tooth crown and spur gear. There is one flex cable and sleeve for each axis.
Lateral motion of the stick rotates an axle which runs aft. Inside the swashplate is a four blade rotor part. Fore-aft motion of the stick pushes and pulls the cable using a ball joint. Click for an animation of the winch boom deploying. At the end of the axle is a ball joint which connects to another flex cable. A pair of simulated turbine engines are nestled beneath the main rotor head.
This model pivots the entire rotor head instead.
LEGO Technic Rettungshubschrauber (8856)
If a real helicopter did this it would risk striking the rotor against the frame. Landing Gear The 3 point landing gear retracts using another crank on the port side. The first crank turns a worm gear which drives a 16 tooth spur gear. Model by Eric Albrecht. Ldraw file courtesy of Benjamin Wendl.
The nose gear retracts forward via a set of 14 tooth bevel gears. The next axle pivots a lift arm which deploys the winch boom. Click for an animation of the landing gear in motion. The spur gear drives an axle which runs both forward and aft. The crank axle also drives a set or gears made up of a 24 tooth crown mating with two stacked 14 tooth bevel gears one of the rare places this pairing is made which passes torque along the length of the boom to the tail through 3 universal joints.
This crank drives a set of 14 tooth bevel gears giving the main rotor a ratio of 1: In both the extended and retracted positions the gear rests against a hard stop.
The final gear ratio is Rescue Winch A pair of cranks on the starboard side operate the rescue winch on the port side. Click for an animation of the cable in motion. The cable runs out to the winch and attaches to a metal hook. The second crank attaches to a 16 tooth spur gear used as a ratchet plate.
The crank turns a worm gear which mates with a 24 tooth spur gear. Click for an animation of the cyclic in motion.
Click the image to download the LDraw file of this model. Each gear pivots a little over 90 degrees.