|
DEVELOPMENT and DESCRIPTION
Poland was comparatively late in attempting an all-glassfibre design, the first SZD type in this category being the prototype Open Class Jantar 1 single-seater (or Amber) of 19m span, designed by Dipl-Ing Adam Kurbiel.
It was then developed by Dipl-Ing W. Okarmus into the SZD-41A Jantar
Standard, which had the same fuselage and tail unit as the Jantar-1 but
new cantilever mid-set wings of 15m span designed to OSTIV Standard
Class requirements. The SZD-41A made its first flight on 3 October 1973
in the hands of A. Zientek, and the Polish team flying the type in the
1974 World Championships at Waikerie, Australia, took 3rd and 7th
places in the Standard Class, while SZD-41s were placed 4th, 6th and
18th in the 1976 World Championships at Rayskala, Finland. Altogether
160 Jantar Standards had been built by the beginning of 1980 and the
type has been exported to 18 countries, including both East and West
Germany, the USA and the Soviet Union.
The wings are single-spar ribless structures with foam-filled
glassfibre/epoxy resin sandwich skin; no flaps are fitted and there are
DFS glassfibre air brakes above and below each wing. There was
originally provision for 80kg (176Ib) of water ballast in the leading
edges. The fuselage is an all-glassfibre/epoxy resin shell, the centre
portion having a steel tube frame on which the wings and the monowheel
are mounted. The cantilever T-tail is also of glassfibre/epoxy resin,
the fin being integral with the fuselage; the elevator has a spring
trim. There is a retractable monowheel with a disc brake and a fixed
tailwheel. The pilot sits on a semi-reclining seat under a
flush-fitting two-piece canopy of which the front half is fixed and the
rear section is removable for exit and entry.
The SZD-48 Jantar Standard 2 single-seater is a development of
the SZD-41A also designed by Dipl-Ing W. Okarmus, and first flew in
prototype form on 10 December 1977; 96 had been built by the beginning
of 1980. The cantilever shoulder wings have single glassfibre roving
main spars and no ribs; they are covered with
glassfibre/foam/glassfibre moulded skins and have plain ailerons, with
duralumin air brakes in the upper and lower surfaces. There is
provision for 150 litres/33 Imp. gal.) of water ballast. The glassfibre
fuselage has a steel tube central frame, and the rear portion is
stiffened by half-frames and ribs. The cantilever T-tail is of similar
construction to the wings and has a spring trim in the elevator. There
is a retractable monowheel with disc brake and a semi-recessed
tailwheel. With simple modifications to the trim and speed measuring
systems the SZD-48 becomes the SZD-48-2.
The SZD-49 Jantar K is an FAI 15m class version of the Jantar
Standard with wing flaps; the prototype first flew on 10 October 1978.
PERFORMANCE DATA
| Span |
15.0m |
| Length |
6.7m
|
Height
|
1.51m
|
| Wing Area |
10.66² |
| Wing Section |
NN-8
|
| Aspect Ratio |
21.1 |
Empty Glider Mass
|
267kg |
| All-Up Mass |
535kg
|
| Water Ballast |
150kg
|
| Load Factors |
+5.3 -2.7 |
| Maximum L/D |
39 at 51kt
|
| Stalling Speed |
34.5kt
|
Minimum Sinking Speed
|
0.6 m/s at 40.5 kt
|
Max. Rough Air Speed
|
92kt |
Never Exceed Speed
|
154kt |
Three Axis View SZD Standard Jantar 2
FLIGHT MANUAL download (PDF 1.18MB)
GGC's SZD STANDARD JANTAR – VH-IUD
VH-IUD was purchased new from Camden in 1980. A group of members was
flown to Sydney (courtesy of the RAAF) to evaluate the prospective
purchase.
The glider fitted in well as a higher performance single
seater. It competed in the World Championships in 1987 being flown by
Eva Daroczy of Hungary. It later performed the role of the clubs first
single seat conversion for many years before being supplanted by the
Junior.
At present the glider has been fitted with winglets; reputed to
improve the low speed handling and performance significantly. The wings
are being refinished in gelcoat and paint.
GGC's SYNDICATE STANDARD JANTAR – VH-CQX
Owned by a small syndicate of three members VH-CQX is easily
recognised by it's distinctive colourful nose. It was purchased
by the syndicate from Barry Woodcock who had imported it new. Over the
years it has been a frequent competitor in the Australian Nationals as
well as in regional competitions such as Horsham Week. It was also the
Standard class winner of the Great Australian Bicentennial Glider Race.
It is fitted with the optional hinged canopy as well as a
second; winch, release on the undercarriage. It has been extensively
sealed as well as beautifully finished in polyurethrane.
|