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Thursday, May 28, 2015

Materials For Decoupage Crafts

Common household materials can be used to create effects. Here is a short list of supplies:
  • Something to decoupage onto. Examples include: furniture, photograph albums, plates, ceramics, shelving, frames, mirrors.
  • Pictures to decoupage with. These can come from myriad sources: newspapers, magazines, catalogs, books, printed clip art, wrapping paper, greeting cards, fabric, tissue paper, lace, paper napkins
  • Cutting utensil. Scissors, craft knife or razor blades can be used.
  • Glue. Standard white glue works best if it is diluted with a little water. Specialty glues can be found in most crafting stores.
  • Smoother. Popsicle sticks work well. A brayer is a specialized tool like a miniature rolling pin designed to help remove wrinkles, remove excess glue and smooth pictures.
  • Glue spreader. Many things around the house can be use for this: cotton swabs, paint brushes, sponges.
  • Rags, sponges, tissue paper to help wipe up glue and other clean up.
  • Sealer. Glue or other decoupage medium can be used as a sealer. Alternatively, polyurethane, spray acrylic, epoxy resin or other lacquers are usually used.

Monday, May 25, 2015

Special Flood Hazard Areas


Parcel 6


Parcel 12


Parcel 18

Saturday, May 23, 2015

Thrust-To-Weight Ratio (TWR) Of Jet And Rocket Engines


Thrust-to-weight ratio is a dimensionless ratio of thrust to weight of a rocket, jet engine, propeller engine, or a vehicle propelled by such an engine that indicates the performance of the engine or vehicle.

The instantaneous thrust-to-weight ratio of a vehicle varies continually during operation due to progressive consumption of fuel or propellant and in some cases a gravity gradient.

The thrust-to-weight ratio based on initial thrust and weight is often published and used as a figure of merit for quantitative comparison of the initial performance of vehicles.

Jet Or Rocket EngineMass (N)Thrust (N)Thrust-To-Weight
Ratio (Low To High)
RD-0410 nuclear rocket engine20,00035,2001.8:1
Pratt & Whitney F11918,00091,0005.1:1
Rolls-Royce/Snecma Olympus 593 turbojet with reheat (Concorde)31,750169,2005.3:1
J58 jet engine (SR-71 Blackbird)27,220150,0005.5:1
RD-0750 rocket engine, three-propellant mode46,2101,413,00030.6:1
RD-0146 rocket engine2,60098,00037.7:1
SSME rocket engine (Space Shuttle)31,7702,278,00071.7:1
RD-180 rocket engine53,9304,152,00077.0:1
RD-170 rocket engine97,5007,887,00080.9:1
F-1 (Saturn V first stage)83,9107,740,50092.2:1
NK-33 rocket engine12,2201,638,000134.0:1
Merlin 1D rocket engine4,400690,000156.8:1

http://en.wikipedia.org/wiki/Thrust-to-weight_ratio






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Friday, May 15, 2015

Oceanic Niño Index (ONI)

Thursday, May 14, 2015

Turing Bombe

Monday, May 04, 2015

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