TDR-Manual 2009 - Henseleit Helicopters

Chapter – VII C o n t r o l & S e r v o A s s e m b l y ( Assembly Group 6 )Assembly of the cyclic servo(Bag 6-II) At first, use thin double-sided tape to attach the four servo attachment plates 0642 on the inside of the side-frameplates of the chassis such that they are aligned to the holes. This facilitates the servo assembly considerably.According to the drawing the cyclic servos are pushed from the outside through the cut-outs of the chassis frame plates withthe cable pointing to the bottom and screwed using the M2,5x12 cross-head screws 0643 and the washers 0643a.(Bag 6-I) Mount the ball links 0630d on the two 45mm rods 0630e such that a distance of approx. 27mm remains betweenthe front sides. Turn the ball links so that they are positioned at right angles on the ball of the servo and the swash plates andthat the writing (2,5) points to the outside. It is difficult to press the ball link on the ball the other way round. The rods are fineadjustedlater.Assembly of the fore & aft cyclic servoAt first tighten the fore & aft cyclic servo supports 0644to the fore & aft cyclic servo using the M2.5x12 crossheadscrews 0643 and the washers 0643a.Attention!Screw the four M3x6 stud screws 0644a in the providedholes.These are used to adjust the correct height of the fore& aft cyclic servo support.This is necessary because the servo housings of thedifferent manufacturers are not standardised and havedifferent heights.If you use the recommended Futaba BLS 451 with thecorresponding plastic servo arm, you can screw thestud screws in such that they evenly protrude from thebottom of the fore & aft cyclic servo support 0644 by2.5 mm. The servo can then directly be screwed to theright inner chassis wall using the two M3x10 lens headscrews 0644b (see images on next page).If you use different servos, screw the stud screwsentirely into the supports and read the furtherinstructions on the top of the next page.20