SZD-54-2
„Perkoz”
TECHNICAL SERVICE MANUAL
SECTION 17.
SAILPLANE REPAIRS
Issue II
April 2014
Revision
Allstar PZL Glider Sp. z o.o.
Doc No. 542.4.02
page 17.23
corrected
If unit performing the repair in agreement with state authority wishes to use
other fibreglass fabric, approved for aviation production, must follow the rule that
quantity of fabrics used needs to be at least equal to total „basis weight” of fabrics
given in Fig. 17
‒1. to 17‒6. In parts made of roving use E-glass roving 2280 tex.
When repairing sandwich shell, foam loss is to be filled with PCV foam, that is
in common use in aviation industry, with density of 3,7 lb/ft
3
or 2,5 lb/ft
3
, in
accordance to notes given in the figures.
Instead of foam recommended by manual, other sandwich core materials used
in composite sailplanes may be implemented, especially if damage is minor.
If laminating composition needs to be thickened for gluing or luting there must
be used following filling materials:
brown microballoon,
fibres cut to length 0,12
” ÷ 0,24”, made of above mentioned roving,
colloidal silica (aerosil).
In filling materials selecting follow the rule:
foam and trailing edges gluing with the addition of microballoon,
joints, fittings, etc. gluing with addition of cut fibreglass and colloidal silica (aerosil).
