In the last three month we got some information together which we want to share - tell you its worth it! But one after the other ... LOL!
Aeromobile Inc. made their first testdrive with the gimbal fan and it looks like they can circle around a peanut - guess this is the craft for all in rescue and close encounter situations -
F. Marc de Piolenc got in touch with us and after a few E-mails he send us some specs for his new Gizmo - so all Sevtec user and racer - here is something which will hold your but up - or better hold more equal pressure in your skirt if you are at idel -
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An object of my invention is to provide a force or torque proportional to an applied, low, pneumatic pressure. This force in turn causes a change in the position of a device (hereinafter "splitter") tending to increase or reduce the pressure to the desired level. Another object is to provide a damping force or
torque to limit overshoot and prevent oscillation. A further object is
to provide all of the above in a device that is easily constructed and
maintained, light and inexpensive, having only
A final object is to provide the above features in a device that can be made an integral part of the plenum chamber whose operating gage pressure it controls. Background: In the course of the inventor’s work on integral lift/propulsion systems for static air cushion vehicles (hovercraft) and on liftoff aids for wing-in-ground effect vehicles (WIG), a recurring problem has been to maintain a constant pressure in a plenum chamber feeding a static ground cushion, while engine power and fan rotation speed varied in response to propulsion requirements. Problem: In small hovercraft at least, constant cushion
pressure is usually sacrificed to simplicity of construction, and the solution
adopted is a fixed flow splitter downstream of the lift/propulsion fan,
which of course furnishes a cushion flow that varies with propulsion power
setting. As a result, the necessity of maintaining a minimum skirt flow
and pressure at minimum power setting ensures that excess flow occurs at
higher settings, wasting propulsion power and causing handling problems.
In the course of developing an automatic
Description: The actuator consists of three plates--- -two
fixed, one mobile ...
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David Carambat from http://cust2.iamerica.net/io1/whitbd.htm send us his Design description for his "High Speed Hovercraft"
| Design description:
The Io Design, High Speed Hovercraft is a streamlined hovercraft
based on proven technology. Its primary use is for comfortable, quite,
long range cruising and brief overnight trips. This is accomplished by
well padded seats and the application of sound deadening material placed
around the perimeter of the enclosed cockpit. The streamlined, wide body
shape of the craft allows for a narrow port and starboard bunk. Twin
front seating is provided with additional space aft ( approximately 3'
x 6') for seating or storage. The craft is designed for durability and
damage tolerance by the application of a monoqouc type structure made up
of encapsulated balsa/fiberglass reinforced panels. The balsa core panels
also help to attenuate sound and vibration. Automotive quality
 Length overall = 20' - 4" (6.2 meters)
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Makes me feel better that i'm not the only one beliving a Hovercraft has to be built after marine standard - equipment which is a lot more expensive than regular automotive. Check out his website on his construction http://cust2.iamerica.net/io1/whitbd.htm .
Last not least here a response from Jim Lyne from the HCGB regarding
the G forces in Hovercrafts - they dropped it ... read on :
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forces because it was felt by all scrutineers that it would be impossible for amateur builders to even measure these let alone make detailed calculations about them. Hope this help clear the problem. Best wishes Jim Lyne
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So for the builder / designer we have three diffrent regulations :
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