0673
DESIGN: SynchroLite ~
Rotor - Blade - Composite - VR-7b - Planform Layout
Drawing:
Notes:
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Coefficient of Thermal Expansion of Blade Materials
|
Material |
Coefficient |
|
|
(μin/in - degreeF) |
|
Carbon |
6.7 |
|
Fiberglass |
20.0 |
|
Tungsten |
2.4 |
|
Rohacell |
|
|
Aramid Honeycomb |
|
Tip
If tip cap was to have a VERY small winglet pointing down & out at say 45 degrees would this 1/ remove some of the tip loss & 2/ decrease, to a limited extent, the lifting of the front edge of the disk when the helicopter is in forward flight.
Core & Blade Strength
Could consider having honeycomb core go beyond the back edge of the uni-directional carbon and at the 41% location fill every 2nd or 3 hole with chopped carbon and epoxy?
Material
Should/must be prepreg to assure equal weight and location of weight in all blades
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Last Revised: February 5, 2000