Botmite 1

Construction
Details &
Photos

Basic

Aerodynamics

More
Photos and
Mods

From Botmite 1to 1.1

Repair
Repair 2
Repair 3
Repair 4
Repair 5
Repair 6

Botmite2 tools
B2-calcs1
 

Camera
Transmitter
Hacks & Mods

Photos 2  Botmite construction of skybot

Collection of Botmite ( skybot ) photographs

 

 

 

Electronics Lab Bench

Nose Battery Hood

IMU -Inertial Management Unit

October 2012

DIY vacuum pump system which removes air pressure to 28 inches Hg. (Mercury) vacuum relative to 14.7 psi - sea level atmospheric pressure. 
  Sealed parts set in an epoxy resin are cured with this vacuum system while temperature and vacuum level is controlled.  After about 24 hours, a lightweight molded part is produced. Parts, such as wings, are made from a composite structure and molded into a strong component using fabric materials, such as, fiberglass, carbon fiber, and kevlar.  The point of this system is to produce a part with high material content and less than 40 % epoxy for maximum strength to weight.
   Tank: 0.9 cu.ft. - about 7 U.S. gallons.
 

  Using air pressure, each square inch of the sealed part is subject to the clamping effect of the atmosphere.  At 14.7 pounds per square inch, a square foot experiences 144 * 14.7 psi or 2,116.8 pounds of clamping force, over a long ton of force per square foot until removed from the plastic bag.
   Core materials may limit the vacuum level as it may crush the core during the cure. 
   An autoclave, or pressurized oven may also be used with some designs.

Use information here at own risk.

Copyright (c) 2011-14 by RentNet, Inc. All rights reserved.

 Resulting composite components from vacuum forming provide tension and compressive strength along the direction of the fabric. This engineered composite may require careful study and analysis to select specific fabrics, layer fabric types, orientate tailored fabric; also select an epoxy and cure to achieve desired strength where necessary.

   Unlike metal, composite parts do not generally have isotropic material qualities; composite strength works in vectors.  So, many layers may be necessary to achieve a specified result.  There are specialized high temperature composites but mostly composite temperature product use may be limited from 140 degrees F to a few hundred degrees Farenheit at maximum. 
   Some ceramic composites may work well at 6,000 degrees F. 

[Home] [Aircraft] [Electronics] [Sensors]

.