B6.4 – Steering Link Spacing

Tech Tip : B6.4 steering link spacing

To keep your steering more consistent left / right, it's ideal to have the servo horn vertical when the wheels are straight ahead. The B6.4 manual calls for a 1mm washer on the steering link, however with most servos we have found that you need 2mm spacing and with the Reedy 1705, you need 3mm to achieve a vertical servo horn.

• After making this change you must readjust your endpoints (especially for turning right) and your steering should feel more consistent.

Other tips:
We space the horn ballstud forward 2mm with the 1705 to set the link close to perpendicular when viewing from the top. This will depend on your servo and horn.
We don't use any washers under the ballstud connecting to the steering bellcrank
I have replaced the 10mm grub screw in the steering link with a 12mm to ensure the same thread engagement

Parts used in this pic:
Reedy RT1705A Digital HV Aluminum Brushless Low-profile Servo
FT Aluminum Clamping Servo Horn 25T, 15.5 mm
RC10B6.4 FT Steering Bellcranks, blue aluminum
Set Screws, M3x12 mm

R. Munday

Source: R. Munday