Fitting the Sceadu Evo 50 tail boom into the heli
| Author: | Rob Turnbull |
|---|---|
| Article Date: | 8th May 2007 |
If in your repairs process you removed the tail pushrod guides, tail boom servo mount and horizontal fin mount, these all need loosely fitting back onto the boom prior to fitting the boom into the heli (you'll have to take the boom back out of the heli in order to do it later).
Pushrod guides and horizontal fin mount
Tailboom servo mounting bracket
Being careful not to lose the correct twist in the tail belt, slide the belt through the tail boom housing at the back of the heli, lift the belt over the top of the shaft and fit it on to the pully.
Fit the belt over the pulley
To tension the belt, carefully pull the boom out of the heli. Belt tension is quite critical, it should not be too tight, and it should not be to loose either.
When applying light sideways pressure to the belt using an Allen key or screwdriver (or similar), just in front of the tail boom tube, the correct belt tension will allow you to not quite touch the two insides of the belt together.
With the belt correctly tensioned, the boom can be locked into position by tightening the four boom clamp bolts in the back of the heli, below the gyro mounting plate.
Next, you can re-attach tail boom support struts to the heli, and once they are in place line up (make horizontal) the horizontal fin and tighten the clamp that holds the fin down to the boom.
Re-attach the tail boom support struts
Set the tail pushrod guides approximately one third distances apart along the length of the boom and screw them down firmly into position ensuring the pushrod does not bind and snake along the boom between these guides. You can check this by looking down the boom, through these guides, from the tail rotor assembly end of the boom.
Finally, reconnect the tail pushrod to both the servo and the tail pitch slider.