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19
Chapter
– 3
S e r v o p r e p a r a t i o n
(Assembly group 6)
0630NS Elevator servo mount
2
0630RS Aileron servo mount
4
0630HS Tail servo mount
2
0634
Servo pad
8
0638
Threaded ball link M2x5
– 3mm
1
0640
Servo gear - 28 teeth
3
N02
Nut M2
1
P2516
Phillips screw M2,5x16
16
NS25
Nyloc nut M2,5
16
L0306
Lense head screw M3x6
8
WL03
Washer M3 large
6
Generally the servos can also be installed when the helicopter is completely assembled. But I advise to prepare the
servos in this stadium to be able to install them in the next assembly step at the inner side of the chassis plates in
advance of the chassis mounting. This eases the work.
Attention!
There are three different servo mountings:
0630NS
(elevator servo),
0630RS
(aileron servo) und
0630HS
(tail
servo). Take care to use the right blocks for the respective servo and take care of the orientation of the M3 hole in the
blocks towards the right side according to the drawings.
The servos are positioned on the drawings (next page) in a way as looking from the right front side on the mechanics
when installed.
The blocks for the two aileron servos are identical and will be mounted with the thread orientated respectively to the right
and the left side.
The blocks for the elevator servo are a little bit longer. They can be distinguished from the other ones by the third hole
between the holes for mounting the servos.
The blocks for the tail servo are much longer and therefore easily to identify.
Note:
All blocks are equipped with a larger hole so standard size servos (hole spacing=10mm) and midi servos (hole
spacing=7,5mm) can be fitted. The screws touch either the outside or the inside of the holes.
Unfortunately there are no standardized rubber fittings or spacers available by the servo suppliers. The fittings are from a
period were the servos were mounted on wood with wood screws and are inappropriate for today’s helicopters. Often the
mounting is too soft depending on the length of the spacers or the design of the rubber blocks. Therefore I recommend
either to shorten the spacers supplied with the servos to be able to compress the rubbers more or not to use them.
To get the necessary extensive pressure on the rubber blocks of the servos the servo pads
0634
will be used (see
drawing next page).
By equal torqueing of the M2,5x16 screws the rubber blocks can be pressed until the servos are fitted tight on their
blocks.
Содержание Three-Dee-Fun TDR-II
Страница 66: ...66 Jan Henseleit ...
Страница 67: ...67 D i m e n s i o n s TDF equipped with 712mm long baldes ...