JS1 Flight Manual - Issue 4
Date of issue: 26 May 2016 SACAA Approved section
1.4 Descriptive data
The JS1 Revelation is a high-performance single-seat sailplane of
conventional layout with a T-tail. Two wingspan configurations (18 m
and 21 m) can be selected, both of which feature full-span flaperons
The cockpit is designed to protect the pilot in the event of a crash.
Safety features include a crumple zone in the forward structure. The
wing structure consists of spar caps made of carbon fibre rovings and
skins of carbon fibre fabric. The wings are connected with a tongue
and fork arrangement, secured with two main pins. The airbrakes are
a triple blade design on the upper surface of the wing.
Boundary layer control is achieved on the main wing bottom surfaces,
the horizontal stabilizer and vertical fin. All control surface hinge gaps
are sealed with Mylar strips and Teflon-coated tape.
The water ballast system consists of two main tanks, each integral to
a wing and holding approximately 90 litres of water, and two trim tanks
in the vertical fin. The tail ballast tanks consist of an expendable tank
of approximately 7.5 litres and a non-expendable tank of
approximately 5 litres. The 21 m wing tips also feature integral tanks,
with a capacity of approximately 17 litres each. The landing gear
consists of a 5 inch retractable sprung main landing gear with a fixed
tail wheel.
All controls are automatically connected during rigging.
Optionally a retractable jet engine approved for sustained flight can be
fitted.
