[R/C ELECTRIC FLIGHT SYSTEMS*__ ) from A L L B A L S A SI Q NED FOR RSTRO FLIGHT inc. ASTRO 25 PIONEERS IN SILENT FLIGHT 13377 Beach Avenue $39.95 J Venice, California 90291 2 CHANNEL SPORT TRAINER DESIGNED FOR ASTRO 5 · 10 MOTORS ALL BALSA All Βλ Ιλλ I Spruce Construction Atm — ISO So In DT SIGHT D top ASTRO >5 T UC T R IC OR IS GLOW MOTORS Ffylne - M - «41 • ELECTRA-FLI NEW R/C SYSTEM FOR »STB0 10, IS, 1 2 6 ^ MtMHUTTI» »DO A ANALYZER — RAPID CHARGER DtDTlIO·•ECfrvl* COMTMt ΠΜΜ A R/C SYSTEM ANALYZER-RAPID CHARGER $38.00 FIELD CHARGER NEW MARINE SYSTEMS (Astro Pup) ASTRO - 020 ASTRO -10 This is the answer to your battery problems. Two ASTRO-23 *19.95 F.F. ASTRO 15 $22.95 R.C. years of development by the company that k tows batteries best — Astro Flight — has resulted in a great little unit that will: • Charge your receiver in 15 minutes. • Charge your transmitter batteries in 15 min. • Test for a high resistance cell in two min. • Test for a shorted cell. • Indicate the capacity remaining after a day’s fly­ ing in 10 minutes. MOTORS SYSTEMS • Measure the capacity of a fully charged battery in ASTRO $10.95 $27.95 10 minutes. SPECIAL TWIN PACKS This unit tells you what you have and allows ASTRO-02 $ 30.00 ASTRO 10 $32.95 $59.95 you to do something about it at the field, not ASTRO- 5 $ 50.00 ASTRO 15 $32.95 $84.95 after you get home. This unit obviates the ASTRO-15 $115.00 need for battery discharge units, expanded ASTRO 25 $44.95 $99.95 scale voltmeter and quick chargers. ASTRO-25 $150.00 Shown Above In Dumas SK20 . $38.00 retail . R /C SAILPLANES AND ACCESSORIES A S -W 1 5 High Performance — Std. Class Slope or Thermal FUSELAGE m RED, WHITE $54.95 MONTEREY Noldt Closed Course World Record of 189 M Perfect Thermal Trainer and Thermal and Slope Soarer Good Competition Plane DLL BALSA SPRUCE $34.95 CONSTRUCTION ? CHANNELR C Stake, line. reel, parachute, all hardware SPAN — iw r included. Std. Hi-start, 100 ft. Surgical $25.95 2 Channel R'C AREA — (00 Sq In. Tubing — $29.95. Astro Start — for big FLYING WT. — 30 Ot. planes — 100 ft. Bungee — $34.95 % FLYING MODELS for those who insist on the VER Y B E S T CONTROL LINE CONTEST AND SPORT MODELS P-40 TIGER SHARK S13.95 Span: 42" Eng: .19 to .35 Kit S-50 HAWKER HURRICANE S13.95 Span: 42" Eng: .19 to .35 Kit S-51 NOBLER S24.95 ” Span: 50" Eng: .19 to .40 Kit N-1 PEACEMAKER SI 5.95 Span: 46" Eng: .15 to .29 Kit N-7 World’s most famous stunt model; winner of hundreds JUNIOR NOBLER $13.95 of contests including many Nationals and World meets. Span: 40" Eng: .19 to .25 Kit N B SCALE & BEGINNER KITS SCALE & BEGINNER KITS All models feature large stunt wing PRO-FLITES JUNIOR ACES U-Control profiles for Vi A Gas engines. MUSTANG $3.95 ' Span: 18" Kit PO-3 γ*·ν LANCER $3.95 " '1 ^ ^ - « Span: 18" Kit PO-1 ^ SPITFIRE $3.95 W jL Span: 18" Kit P0-2 O COSMIC WIND S5.95 Span: 24" Eng: .049 Kit N-12 FORM-FLITES < Scale models for Vi A Gas engines. Superform fuselages. J f l u ZERO S-20 ^ HELLCAT $4.50 | B Span: 18" Kit S-21 THUNDERBOLT $4.50 \ Span: 18" Kit S-22 4 M JIGTIMES (Rubber Powered) Build ’em and fly ’em in an hour. PIPER VAGABOND $2.95 , 3 * Span: 18" Kit TF-2 RASCAL 18 $2.95 Span: 18" Kit TF-1 STINSON SENTINEL $2.95 MUSTANG P-51B S5.95 Span: 18" Kit TF-3 Span: 24" Eng: .049 Kit N-11 SEND 250 FOR 8 PAGE CATALOG PLUS MONOKOTE SAMPLE 2635 S. WABASH AVE. TOP FLITE MODELS, INC. CHICAGO. ILLINOIS 60616 APRIL 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 1 M ACS ANNUAL 1976 SATURDAY MAY 1st A NON SELLING SHOW THE W ORLD’S LARGEST HOBBY SHOW! Hundreds of exhibitors, demonstrating thou­ sands of brand new products and ideas for your leisuretime pleasure. Continuous Indoor and Outdoor demonstrations by world renown experts. EXCITEMENT EVERY MINUTE! * Radio controlled airplanes, boats, cars and helicopters in action plus u-controls and free flights! * Gigantic working model railroad layouts in all popular gauges! * Plastic models—Rockets flying! * CRAFTS of all descriptions . Jewelry Macramé - Decoupage - Paper tole - Eggury Stitchery Candlecraft · Ceramics and more HOBBY CONTEST OPEN TO THE PUBLIC NO ENTRY FEE! Hundreds of Awards! Stop by your local Hobby Shop i for complete Details._____ ANAHEIM CONVENTION CENTER _______ __________(A cross From D isneyland) Although introduced less than a year ago, the Kraft .61 has already es­ tablished itself as the leading .61 cu. in. contest engine. It was used by 5 out of the top 10 finalists in Class D Expert at the U S. Nationals. In the highly competitive Las Vegas Tournament of Cham­ pions, it was selected by 11 out of 23 contestants (over twice as many as any other engine). At the large Tucson Winter Nationals, it took first and second place, and 5 out of the top 10 At the Tan­ gerine International R /C Cham­ pionships, again first place; most recently at the first major contest of the year, the South­ western R/C Championships, it placed first and second. Contest winning is, of course, an important indicator of engine perform­ ance. Perhaps more important to the day to day sport flyer, is long life, de­ pendability, and ready availability of parts and service. These are assured with the Kraft .61 because it is produced in the U S A by a dedicated group of R/C enthusiasts We believe it to be the world's best .61 cu. in. R/C engine. WRITE FOR FREE CATALOG K r a f t Worlds Largest Manufacturer of Proportional R/C Equipment J L SYSTEMS. INC. 450 WEST CALIFORNIA AVENUE, P.O. BOX 1268, VISTA, CALIFORNIA 92083 MODELS BUILDER presents the MASTER MODEL BUILDER Send all entries to: of the month MODEL BUILDER/PANA-VISE CONTEST 1105 Spurgeon St., Box 4336, CONTEST Santa Ana, California 92702 COLBERT INDUSTRIES, manufacturers of PANA-VISE, the unique hobby vise which turns and tilts to any position, in conjunction with MODEL BUILDER magazine, is sponsor­ ing a design com petition for MODEL BUILDER readers. This monthly contest will be judged for originality and/or craftsmanship for all types of models (excluding plastic static scale). Entries will be judged purely on the basis of photo­ graphs and drawings supplied by the builder of the model. Emphasis in judging w ill be on originality, technical achievement, and craftsmanship, as found in the submitted material. A MODEL 301 PANA-VISE WILL BE AWARDED EACH MONTH TO THE WINNING ENTRY 3. If photos cannot offer sufficient information about the model, the construction drawings may also be submitted. Drawings should be dean, pencil draw­ ings with all pertinent dimensions indicated. A print of the drawing is acceptable. 4. A written description should be included with photos and drawings, explaining in fair detail any unusual features of the design, and explaining any unique technical difficulties that the model may have achieved. 5. Please do not submit any designs that have been accepted for use in another publication. MOD­ EL BUILDER requests first option on publishing any submitted design. Payment for published designs will be at our regular rates. Any prizes awarded do not represent an agreement to publish any design. 6. Entries will be judged by the modelers on Requirements for entries: MODEL BUILDER'S editorial and art staff, and all 1. Any type model may be entered (aircraft, cars, decisions of the judges will be final. boats, etc.). Kits may be entered if significant modi­ 7. Postage must be furnished if return of sub­ fications have been made to the stock kit. mitted entries is desired. 2. Do not send the actual model. Send only black 8. Deadline for entries in the first contest of the and white photos, showing at least three views of series is July 1, 1975, and winners will be announced the model. Include some familiar object in at least in the September 1975 issue. Subsequent entries will one photo to indicate the size of the model. Try to be due the first of each month and winners will be include photos of any significant details. announced the second month following each dosing. April’s winner is JOHNNIE SMITH, Massillon, Ohio. His entry is a Curtiss HS-2-L flying boat, the first operational aircraft used by the U. S. Navy. The 56 inch span model is built of bass wood, with fittings and engine built from brass. Wings have fabric sag sanded into surfaces, with rib tape over rib lo­ cations. Struts are spruce, while cannon/ machine gun and radiator are brass. Fin­ ish is fiberglass undercoat with enamel and lacquers for the finish colors. Model was built for the Smithsonian Institution to commemorate the 50th anniversary o f Naval Aviation. 4 MODEL BUILDER M O D E L 0 APR IL 1976 BUILDER volume 6, number 52 1105 SPURGEON. BOX 4336, SANTA ANA. CALIFORNIA 92702 (714) 547-3963 STAFF CONTENTS E D ITO R FEATURES Wm. C. Northrop, Jr. GENERAL MANAGER WORKBENCH, B ill N o r t h r o p .................................................................................................. 6 Anita Northrop EDITORIAL ASSISTANT OVER THE COUNTER,T a y lo r C o llin s .............................................................................