Revolution and other "4 liners"
flying with 2 lines
Bridling 4-2 (version 2).
For sometimes, I had been preoccupied
by the ROGALLO curse, in other words, the impossibility to get away from the
Delta shape to obtain a 2 lines stunt kite with the exception of the JALBERT
parafoils and the Peter POWELL kites.
The first breakthrough within this
curse came from an old commercial kite : the "Trekking Sport", a soft kite
derived from the paragliders and equipped with a pulley bridle system bringing
together 3 points of the bridle (central, rear leftand rear right) to the two
flying lines (left and right).
The fatal breakthrough was the invention of
the "Jonathan" by Maxime ROUSSELLE : a "2 liner" with a wing ratio of 5 which
won the innovation first prize in Berck in 1996. A creation shaking the Delta
monopoly ky its novel shape, its ingenious rudder bar bridling system
distributing the static bridles and the warping wing bridles on the two
The drawing of the 4-2 bridle clearly explains how to bridle from 4 to
2. The device is attached to the 4 connecting points of the four lines : B1, B2,
B3, B4. The bridles B1-C, B2-C have a lenght of 141 cm, and the brides B'3-B0
and B'4-B0 = 115 cm. The B3-B'3 and B4-B'4 depend on the "4 liner" model and
wind strength, 24 cm long for the Revolution 1.5 . At the C point, I use a
fishing rod ring to ease the sliding of the G-C-D bridle which is 275
centimeters long and made of Topline 135 Kg (or Dyneema). You must slighty
adjust the length of the B0-C bridle (= 10 cm long for the Revo 1.5) in order to
get B'3-G and B'4-D bridles just taut. The B3-B'3-G and B4-B'4-D bridles, 257
centimeters long, act upon the incidence of each "wing" of the
Depending the wind strength, you will have to adjust the general angle
of attack of the sail by modifying the length of the B3-B'3 and B4-B'4 bridles :
+/- 4 cm long.
I experimented the
4-2 bridle on very different kites : the Revolution, my DoubleV 100, my
Sledmatiste C3. The flight is generally classical if we refer to the "2 liners",
but the control of the kite at low speed is somewhat more difficult. To come
more easily out of the turns and most of all, out of spin, pull simultaneously
on the 2 lines as you do for a fighter kite. On the other hand, if your kite
lands on its leading hedge, simply pull one of the lines to force it to pivot