|
Pendulum and Dihedral Stability "Myth"
Demolished
Its common knowledge that the passive yaw
stability of a single-line kite is severely limited by its pendulum
stability force. Flat kites further rely on dihedral to counter roll. A
lateral bridle eliminates the need for dihedral and soft kites are often
so based. The sudden "obvious" insight is that "staking-out" a kite across
the wind completely eliminates the need for pendulum force or dihedral to
stabilize a kite. This use of the surface-plane as the constraining
stabilizing principle is great news for scaling up our kite farms with
great stability to fly in high wind and turbulence. The pitch axis is a
lesser remaining stability challenge; a luffing leading edge is the
condition to avoid. A pressurized leading edge, "ski-jump" center nose
reflex, and/or a trailing edge flap or tail effectively eliminate plunging
dive or somersault; added as needed for required engineering margins.
This general staking-out geometry is the "green-light" for megascaling
cross-linked kite formations without critical dependence on active
servo-stability.
CoolIP*
~Dave Santos 19Jan2012 AWES5424
Comment and development of this topic will be occurring here.
All, send notes, drawings, and photographs!
Terms and aspects:
Related links and concepts:
- [ ] Early drawing of tri-stake-out of large kite
- [ ] Video?
- [ ] Notice anhedral kites
- [ ] Notice the stake-out of the wide-base rotating ribbon kite.
- [ ]
-
Commentary is welcome:
|