Author: B. Boss
Edition: Model Aviation - 1993/08
Page Numbers: 78, 79, 82, 89
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CONTROL LINE SCALE

Bill Boss 77-06 269th St., New Hyde Park, NY 11040

COMPATIBILITY

Finishing materials can often be a problem. At times you may wonder which undercoat or finish is compatible with another. The table below shows compatibility for some finishing materials frequently used on models. The table was found in The Probable Cause, newsletter of the Rocky Mountain Aeromodelers. I could not find a credit, so to whomever put the data together—thanks for a job well done.

Using the table is simple: C = compatible, N = not compatible.

Examples:

  • Vinyl spackle is compatible over poly resin. Find vinyl spackle in the "over" section and read down to poly resin — a C indicates compatibility.
  • Vinyl spackle is not compatible under poly resin. Find vinyl spackle in the "under" section and read across to poly resin — an N indicates incompatibility.

Make a copy of the table, mount it on stiff cardboard, and keep it handy at the workbench as a finishing reference.

CHEMICAL COMPATIBILITY OF COMMON FINISHING MATERIALS

Columns (left to right):

  • Poly-Urethane
  • Acrylic Enamel
  • Epoxy Enamel
  • Alkyd Enamel
  • Acrylic Lacquer
  • Butyrate Dope
  • Nitrate Dope
  • Aero Gloss Dope
  • Dupont 305
  • Poly Resin
  • Vinyl Spackle

Rows (each line shows compatibility of the row material with the columns above; C = compatible, N = not compatible):

  • Vinyl Spackle: Poly-Urethane C, Acrylic Enamel N, Epoxy Enamel C, Alkyd Enamel C, Acrylic Lacquer C, Butyrate Dope C, Nitrate Dope C, Aero Gloss Dope C, Dupont 305 C, Poly Resin C, Vinyl Spackle C
  • Poly Resin: Poly-Urethane C, Acrylic Enamel C, Epoxy Enamel C, Alkyd Enamel C, Acrylic Lacquer C, Butyrate Dope C, Nitrate Dope C, Aero Gloss Dope C, Dupont 305 C, Poly Resin C, Vinyl Spackle C
  • Dupont 305: Poly-Urethane C, Acrylic Enamel N, Epoxy Enamel C, Alkyd Enamel N, Acrylic Lacquer C, Butyrate Dope C, Nitrate Dope C, Aero Gloss Dope C, Dupont 305 C, Poly Resin C, Vinyl Spackle C
  • Aero Gloss Dope: Poly-Urethane C, Acrylic Enamel C, Epoxy Enamel C, Alkyd Enamel C, Acrylic Lacquer N, Butyrate Dope C, Nitrate Dope C, Aero Gloss Dope C, Dupont 305 C, Poly Resin N, Vinyl Spackle C
  • Nitrate Dope: Poly-Urethane C, Acrylic Enamel C, Epoxy Enamel C, Alkyd Enamel C, Acrylic Lacquer C, Butyrate Dope C, Nitrate Dope C, Aero Gloss Dope C, Dupont 305 C, Poly Resin C, Vinyl Spackle C
  • Butyrate Dope: Poly-Urethane C, Acrylic Enamel N, Epoxy Enamel C, Alkyd Enamel N, Acrylic Lacquer N, Butyrate Dope C, Nitrate Dope C, Aero Gloss Dope C, Dupont 305 C, Poly Resin C, Vinyl Spackle C
  • Acrylic Lacquer: Poly-Urethane C, Acrylic Enamel N, Epoxy Enamel C, Alkyd Enamel N, Acrylic Lacquer C, Butyrate Dope N, Nitrate Dope C, Aero Gloss Dope C, Dupont 305 C, Poly Resin C, Vinyl Spackle C
  • Alkyd Enamel: Poly-Urethane C, Acrylic Enamel N, Epoxy Enamel C, Alkyd Enamel N, Acrylic Lacquer C, Butyrate Dope N, Nitrate Dope N, Aero Gloss Dope C, Dupont 305 N, Poly Resin N, Vinyl Spackle C
  • Epoxy Enamel: Poly-Urethane C, Acrylic Enamel N, Epoxy Enamel C, Alkyd Enamel N, Acrylic Lacquer C, Butyrate Dope N, Nitrate Dope C, Aero Gloss Dope C, Dupont 305 C, Poly Resin C, Vinyl Spackle C
  • Acrylic Enamel: Poly-Urethane C, Acrylic Enamel N, Epoxy Enamel C, Alkyd Enamel N, Acrylic Lacquer C, Butyrate Dope N, Nitrate Dope N, Aero Gloss Dope C, Dupont 305 N, Poly Resin C, Vinyl Spackle C
  • Poly-Urethane: Poly-Urethane C, Acrylic Enamel N, Epoxy Enamel C, Alkyd Enamel N, Acrylic Lacquer C, Butyrate Dope N, Nitrate Dope C, Aero Gloss Dope C, Dupont 305 C, Poly Resin C, Vinyl Spackle C

F.Y.I. — Model Flight (reference book)

Model Flight is an 8½ x 11 softbound book (more than 200 pages) covering many aspects of model flying. The fluorescent pink cover makes it easy to find on the workbench or in your library.

The book has five sections:

  1. Yellow pages — alphabetical listing of model products sorted into 265 categories, with company names and phone numbers.
  2. White pages — manufacturer listings (names, addresses, phone/fax, products, catalog/brochure data, ordering information). More than 1,500 sources listed, with a comprehensive index.
  3. Tables — 15 tables comparing vital statistics on six types of model aircraft (CL, RC, FF, sailplanes, electrics, and helicopters), motors, and RC equipment. Example: the kits table lists kit name, manufacturer, class, wingspan and area, weight, motor size, brief notes, and retail price.

4–5. Listings — more than 2,500 model clubs and hobby shops, alphabetically and by state.

Purchase: $19.95 (includes shipping & handling in the U.S.; add $1.45 for first class) from Dynamic Modeling, 4922 Rochelle Ave., Irvine, CA 92714-2941, or from your local hobby shop. Clubs or groups ordering four copies from Dynamic Modeling get one free.

CONTEST REPORT

Dale Campbell, president of the Metrolina Control Line Society, reports the October 1992 Carolina Criterium meet was a great success. The two-day affair had good weather, temperatures in the 70s, and second-day winds of only 10–15 mph.

Sport and Profile Scale events had a total of 10 entries — a record for this contest. Fliers came from South Carolina, New Jersey, Ohio, Georgia, and North Carolina. Dale hopes the increase in scale contestants is a good sign for the future.

The contest was held at the new David B. Waymer Flying Field (developed by Mecklenburg County) in Huntersville, near Charlotte, NC. The former landfill now contains two paved circles, one grass circle, and an RC runway. The Metrolina Control Line Society—and modelers in general—owe a big thank-you to Mecklenburg County for this park development and for promoting model aviation.

WORKSHOP HINT

From Prop Wash (Garden State Circle Burners): Windy Untrowski wrote on control systems for stunt planes. Key points applicable to scale and other CL models:

  • Braided leadouts can fail; solid wire leadouts are a good alternative.
  • Soldering leadouts: choose a strong, vibration-resistant solder. Stay-Brite (silver-bearing) solder is recommended. It melts at about 430°F and can be used with an iron, gun, or torch.

Soldering procedure:

  1. Apply Stay-Clean flux to parts to be soldered.
  2. Heat parts until the solder flows thoroughly onto them.
  3. After solder hardens, wash the area with water to remove flux residue.

Always follow product instructions and cautions. Make all connections good ones—you may be saving a great model.

Please send ideas, notices of upcoming CL Scale events, contest reports, and especially photos of CL Scale activity to the address at the top of this column.

Transcribed from original scans by AI. Minor OCR errors may remain.