1:3 Grunau Baby IIb by Schneider - RC installation
Rudder control system:
As I did on my other scale ships, here I also am using a pull-pull setup, with a bellcrank at the servo end, so that the wire tension is not applied to the servo bearings.
On this occasion, however, I also installed a bellcrank on the rudder end, for 2 reasons :
1. So that the wire tension would not have to be absorbed by the rudder hinge points either,
2. So that the ruddder is easily and quickly removed and installed
Servo is ein a Hitec HS-475 HB
Elevator control
The elevator servo also is a Hitec HS-475 installed directly at the elevators in the horizontal stabilizer
I later decided to change the method of joining the 2 elevator halves shown in the upper pictures.
The 2 halves are joined by means of matching size square brass tubing, which slide into one another.
On the outer tube, a control horn, also made of brass, is brazed on
Spoilers
For testing purposes, a Hitec HS-525BB is installed, which was later replaced by a Hitec HS-475 HB. The arrangement
shown was also changed to the arrangement shown in the lower pictures.
This was done for 2 reasons : First, with the previous arrangement, I would not been able to "hide" the servo under
the sheeting surrounding the spoiler, without altering the size and shape of the sheeting field, and second, to be able
tomake the pushrod shorter.
Selfmade tow release and tow release servo installation
Fuselage section of the wirnig harness for the wing servos. Connectors are the grey Multiplex 5-pin connectors
Receiver below the cockpit floor
The wiring was also placed "belowdecks" to keep it out of view.
View from the cockpit aft, into the fuselage : Of course, my picolario variometer also needed ist place,
it wa splaced next to the ruder servo.
View from the cockpit forward :
Since I will need balancing weight up front anyway, I decided to put some of that weight to use, adn installed 2 5-cell
2400mAH packs.
5 cells, in order to compensate for the voltage drop along the relatively long servo leads in this model
In order to keep space for the tow-release linkage, on of the 2 packs is placed in a battery box above the row-release.
Aileron servo & bay :
Here the aileron servo, already installed. Servo is Hitec HS-475HB, access panel and pushrod are on the underside of the wing.
