Handbuch Slingsby T21 - BGA 782
Seite 25 von 35
rh!!
leaf issued with A.L. No.
I,
September, 1949
A.P.4309A, Vol.
I.
Part
1.
Sect. 3
Chapter 1
RIGGING AND FLYING CONTROLS
LIST OF CONTENTS
General
T"stllng ...
.
Levelling ... .
RIGGING
Diagonals ....
Main-plane incidence
...
.
Maln·plane dihedral
... .
roil-plane Incidence .. .
.
Tall·plane level ....
Control surface movements
General
Ailerons
Rudder
£lc't'Qwr
Para.
I
3
�
7
8
9
10
"
12
,.
15
.... 16
Spoilers
FLYING CONTROLS
Aileron control .. .
.
Rudder control .. ..
Eleyator control .. .
.
control ....
. .
.
.
cable ,tensions
..vleran (on(ro/
Elevator control
Rudder
control
.
.
..
Static friction loads
Aileron (onlrol
E.levotor
(antral
Rudder control
Para.
17
18
19
20
21
22
23
H
25
2.
27
28
29
LIST OF ILLUSTRATIONS
Rlnlng diagram
Flyinr conlro/s
General
Flg.
I
2
1 .
This chapter describes the method of
rigging the glider, using a spirit level and a
parallel straightedgc, at least
6
ft. 3 in.
long, in conj unction with incidence boards,
Part No. 2 IB /4 /1 , 2 I B /4 /2 and 2 I B /4 /4,
and dihedral board, Part No. 21B /4/3.
2.
The packing referred to in the rigging
operations
(para.
S to
1 1 ) can, for con
venient adjustment, take the form of a long
wedgc of approximntcly' 2 dcg. included
angle and i in. wide. Alternatively, an
adjustable level can be used and direct
angular readings taken on the top edge of
the
incidence board, dihedral board or
straightedge, as appropriate.
TRESTLlNG
3.
:
For all rigging checks the glider must
be rigidly supported so that the rigging
datum lines are horizontal ; trestles should
be pLaced under the fuselage a.t frame 2
'
and forward of the tail skid, and under the
main spar of each main plane, adjacent to
the main strut attachment fittings. Suitable
fuselage trestles, which can be manufac-
F,S./I
Lubrication diorram
Fir·
3
tured locally, are illustrated in Part 2,
Sect.
I,
Chap. !.
LEVELLING
4.
To check the lateJ;at level, lay a straight
edge on the levelling blocks fixed to the
front face of frame 3 (the rear bulkhead in lhe
cockpit) and, using a spirit level, adjust
the trestles under the wings until the
straightedge is horizontal.
S.
To check the fore-nnd-aft level. hold a
straightedge so that its top edge lines up
with the straight portion of the top longeron
of the fuselage aft of the cockpit. Apply
a
spirit level and adjust the trestle forward
of the tail skid either with packing or by
moving it, until the straightcdge is level.
6.
An alternative method of checking the
fore-and-aft level is to set up a straightedge,
on any convenient support, at a distance
of approximately
15
ft. from the side of
·the fuselage, approximately parallel to the
longitudinal centre line of the glider, and
at the same height
as
the top longeron.
Level the straightedge and sight across the
top edge
la
the top longeron.
