Day 3

FLOAT Documentary Vid
Build Design

• Balsa
  • (1) 18" sheet A grain, thickness between .045" and .050", density not more than 5.5 pcf (for wing and stab spars)
  • (1) 18" sheet C grain, thickness between .020" and .030", density not more than 5.5 pcf (for rolled motor stick if used)
  • (1) 18" sheet any grain any density around .030" thick (for ribs)
• Winder: yellow plastic 15:1
• Torque meter: the torque meter must have a range to at least 1.0 in-oz. You can make this if you'd rather do it that way.
• Covering plastic
  • Covering: Indoor Mylar, clear. .000059 x 12" 35 ft roll
• Propeller assembly
  • Plastic Prop or Ikara SO model propeller
  • Ray Harlan Penny Plane bearing (NOT the SO model bearing) .019 or .020" or the bearing included with ikara props.
• Music wire and Teflon washers
• Glue; Ambroid or Duco glues
• Glue Thinner; Acetone from hardware or home improvement store
• Glue Bottle: with steel needle nose and cap
• Glue for wing covering Super 77 spray glue
• Rubber for motors
• Tool box: fishing tackle boxes are nice esp. the 747 model.
• Table: folding but get one big enough to have some weight when winding
• Building Board; cork or 3 inch or more thick styrofoam from home improvement store
• Wax Paper: to cover building board with plans in between from food store
• Pins: to hold wood on building board in place to glue. Regular straight pins or T shape are better from
• Knife: Exacto type
• Razors Single edge: for striping wood
• Ruler: for straight edge to cut wood
• Scale: Best bet is to borrow the schools or get a digital scale with 0.01 gram accuracy.

Alternatives

• Balsa Cutting: Master Airscrew balsa stripper
• Thrust Bearing:
• Winders: (You really probably don't want anything other than the 10:1 or 15:1 yellow plastic type)
• Pitch Gauge: for pitching the prop blades
• Scale: not digital but more accurate than most. You need to measure to 0.01 grams. You can also build your own, look under the "build your own" section
• Knife: thin bladed Surgeon's type for cutting ribs
• Sand Paper: very fine grain for smoothing wood; usually 220-320+