Century Hummingbird 3DPRO

4-17-2007

I am still very limited on machine time but I do have Kit's in stock at the moment. I will try to stay up on the website. I am running very low on the landing struts.

I greatly appreciate the support. Keep the Hummingbird alive !

Belt Drive Conversion for the Century Hummingbird 3D Pro.

Belt Drive Conversion - Complete Kit

A bolt on kit to convert the stock gear driven tail system to Belt Drive.

Includes Boom Adapter with pulleys, 48 tooth pulley, 10 tooth pulley, Tail Box, Belt.

Uses the stock HB boom, servo mount, fins, tail blades and slider system.

If using the MH Aluminum Tailbox - It will require some modifications as the belt will not fit though the Tailbox.
Uses Stock bearings NOT Included

New design tail pulley not shown, now with only one flange.

HP-BCP10 - 10 Tooth Tail Pulley - $6.00 each

I am in the process of updating some of the items and pictures.
The lastest versions do not have the second side of the pulley, this became a bigger problem then what it was to solve, Due to the inconsistant quality of the commercial version of this pulley I am now making my own.

Tail Pulley - 10 tooth

New design main pulley, injection molded one pc not shown

Main Pulley - Replaces the Crown gear with the new front pulley. Just remove the crown gear pin, slide off the gear and replace with the pulley and adapter, uses the same stock pin as the crown gear. Bolt On Replacement.

380 tooth Belt - Used with the Stock HB boom.

Conversion Boom Adapter - This replaces the rear frame support and guides the belt into the boom. No cutting required, and includes a spot for the Gyro to mount. Includes Idler pulley and spacers for the bearings.

New lighter version shown

Tail Box - Heavy Duty tailbox for the tail, holds the tail pulley inplace. Uses all stock tail parts. Uses Stock bearings NOT Included. We have started shipping a new version of the Tailbox that I am injection molding, it is the same design and stong just easier to produce. It does look better with rounder corners.

Now shipping with 4 aluminum spacers that hold the idler bearings centered. I will send out these spacers to previous owners per request. It appears this helps some people and others don't need the spacers. Much of this is due to slight alignment issues on the boom mount, if it's slightly raised the belt will run at the top of the pulleys and same for downwards.

Here is part of an Email response I received in regards to the spacers.
I was able to get a lot of flying in today and test the new spacers you sent me. I found that when I tightened up the screws with out any of the spacers the belt would start to ride on the bottom of the idler pulley and this is why i requested the spacers. Before i recieved them I loosened the screws so that the bottom of the threads were aligned with the bottom of boom/frame/idler pulley mount. With this setup the belt would keep the pulleys in the right place and never moved off them like it did when it screws were tight. I installed the spacers on the bottom of the idler pulley's and kept the screws loose and it moved the belt up and it seemed like there was a little more friction then with out the spacers. I have decided to fly the heli with out the spacers but if I have anymore problems then I will let you know what I do.

Basic Instructions:

Instruction Manual

For More information on this Mod Check out the discussion on RunRyder