logo
Original Year
 1997
# of pieces
 107
Categories
 Aircraft:  Helicopters
Dimensions
 22(L)x19(W)x14(H)
Features
 Rotating main and tail rotor
Other Views

8215 Gyro Copter
iso revolve
Click the image to download the LDraw file of this model.
Model by Michael Heidemann
The 8215 Gyro Copter was the first and only Auto Gyro in the Technic line-up, although arguably it is actually some sort of hybrid helicopter instead.  In a real auto gyro the main rotor is not powered but auto-rotates as air flows over it.  It is therefore as analogous to a wing as to a rotor.  Forward thrust is provided by a traditional longitudinally mounted propeller.  In the case of this model, both the rotor and the prop are geared together.  The model uses uncommon yellow flex tubing as a curved cockpit.  The cockpit is scaled for a Technic figure although the model does not include one at this low price point.  This is an example of one of the very simplest Tech Play models designed for a beginner Technic audience.

Features
Rotors
The rotor's and propeller's rotation is driven by an input crank on the left side.  This crank drives a 24 tooth crown gear.  Both the rotor and propeller are geared via an 8 tooth pinion from the input crank, therefore both turn at the same rate with a ratio of 3:1 with respect to the input crank

The main rotor has 3 blades and uses the Technic rotor hub to construct the blades with plates.  The prop is a specialized monolithic part.
 crank    rotor
 Click for an animation of the rotor in motion.
Wheels and Tires
The tricycle landing gear uses old standard pulleys and tires.  The whole undercarriage makes extensive use of the new angle connectors.
 Wheels
 

Other Views
Side View
side view
 Top View
top view
Front View
front view		 Back View
back view
Computer Render
Render

Contact me with comments on this page.