S Old Timers O Clarence Haught THAT FABULOUS Brown Jr pre vious column discussed virtues special events specific engine model Hardly sooner copy went editor received announcement Bud McNorgan going organize Brown-Powered event coming season Although widely known Bud instrumental activating old-timer movement favors some old classics like Dalliare Sportster Flying Brown-powered ship hopefully annual event would great dont happen own 50000 Brown Juniors produced during later 1930s may relegated role a spectator course could purchase a new Wahi-Brown Junior Custom Engine Ive wanting run engine test review Herbs engines some time Buds contest announce ment encouragement needed asked Herb loan en gines test engine arrived promptly very first moment must say continued highly impressed what saw experienced WahI-Brown Junior Custom engine replica model Brown rather combination best features original models dimensions stroke bore etc faithful Brown design exhaust ports square rather u-shaped provide same efficiency Herb has gone great lengths identify engine through em bossing employing slightly larger dia meter cooling fins distinguish original engines crankshaft ma chined chrome molybdenum steel piston fine grain cast iron mated its cylinder through series machin ing grinding honing finally hand lapping process controlled ten thousandth inch fitted investment cast crankcase fuel sys tem employs cast tank top spring loaded filler formed plastic tank machined needle valve quarter-turn choke assembly Original Browns equipped three ignition timers under slung cast upright timer Hur leman type Herb employs adaption Hurleman timer Point gap regulated eccentric insulator WahI-Brown preceded run 400 40th Anniversary Brown Junior engines After learning 90% special engines wound up collectors shelves Herb felt market flying Brown developed WahI Brown engine decision reinforced fact Herb has five-month backlog orders engine $13950 price tag seems bit high might compare some con temporary mass-produced 60s market today keeping mind essentially handmade engine 370 operations manufacture basic engine 40 done Herb timer assembly requires 57 operations itself Herb also handcrafts Hurleman Continued page 100 Wahi-Brown Junior has effective intake choke simplify starting Quantity built Herb Wahi historic engine has squared exhaust ports loriginal U-shaped portsl Chart gives rpm/prop test figures 52 Model Aviation WAHL-BROWN JUNIOR FUEL 4-1 UNLEADED GASOLINE SAE 70 OIL ELEVATION 2150 FEET TEMPERATURE 5O F PROPRPM 12-6POWER PROP6400 13-5REV UP6400 14-5REV UP6100 Lennart Hodstroni Swedish Wakefield enthusiast Bob Copland designed GB3 Original flown British team member Copland last prewar Wakefield Left US. almost destroyed accident rebuilt flown OS Chi Nats Zaic Sven-Olov Linden plc Assisting George Grosshardt start O&R 2j-powerea Junior Mercury Don Jenkins made first official max Playboy Sr 5th Annual aT contest Wright-Patterson AFB last September says Old Timer just old folks all-important storage envelope using envelope record data about motor store motor between flights Stan assured can eliminate unknowns pre dict model performance quite well contest has lost because wrong motor used critical time Bud Tenny Box 545 Richardson TX 75080 FF Old-Timer/Haught continued page 52 type spark plug test engine like its sisters has run Herb required breaking After mounting engine stand filled tank recommended 4to-i fuel mixture unleaded gasoline SAE 70 oil Brown long stroke high torque engine normally swings 14-inch prop 6 8 pitch prop sup ply included 12- 13- 14-inch props following usual practice breaking engine light propeller load bolted 12-6 engine hand started easily after clocking three revolutions using Herbs recommended needle setting 2 turns instruction sheet calls short initial runs 5 10 seconds followed cool ing period since engine very tight found engine would run about 15 seconds stopping its own after couple tanks engine would con tinue run until fuel exhausted ran suggested ten tanks through engine rich settings before taking rpm reading tached engine 6400 rpm 12-6 Powerprop 13-5 Rev Up gave same reading final run 14-5 Rev Up indicated 6100 rpm tests run within 20 minutes ele vation 2150 feet temperature 500 F Part breaking-in done evening Flame exhaust parts suggested potential fire hazard closely cowled installations fact no doubt con tributing development accessory exhaust stacks Herb also has avail able did notice two minor faults engine First no built-in rachet sys tem prevent needle valve setting change vibration problem exist ed original Brown solved installing short piece fuel tubing tween needle valve proper needle valve body second item relation sharp edge cam cut prop drive washer scraping movable point could readily corrected stoning slight radius edge cam cut As engine belonged Herb did anything about very good engine good smooth power ease handling Herb also manufactures stocks complete line accessories ignition engines well made-to-order Hurle man engines both singles twins Herbs catalog nice addition library included appropriate cartoons Better get waiting list can fly Bud McNorgans contest next year Very First Thermal Central Indiana Aeromodelers CIA Informer Magazine editorialists remind us now first thermal resulting thrill derived therefrom Well too long ago remember saw young Don Jenkins get first max O&R 23 Playboy Jr last Sun day will remember scene year. now acne gone 5 oclock Clarence Haught Rt 5 Box 16 Coeur dAlene ID 83814 Acorns/Fridenmaker continued page 53 duced people both kids par ents modeling improved clubs standing within community great time doing Scouts have fun building flying Scout leaders have welcomed activi ties kids didnt have invest time planning prizes given just inexpensive ribbons pur 100 Model Aviation
Edition: Model Aviation - 1978/03
Page Numbers: 52, 100
S Old Timers O Clarence Haught THAT FABULOUS Brown Jr pre vious column discussed virtues special events specific engine model Hardly sooner copy went editor received announcement Bud McNorgan going organize Brown-Powered event coming season Although widely known Bud instrumental activating old-timer movement favors some old classics like Dalliare Sportster Flying Brown-powered ship hopefully annual event would great dont happen own 50000 Brown Juniors produced during later 1930s may relegated role a spectator course could purchase a new Wahi-Brown Junior Custom Engine Ive wanting run engine test review Herbs engines some time Buds contest announce ment encouragement needed asked Herb loan en gines test engine arrived promptly very first moment must say continued highly impressed what saw experienced WahI-Brown Junior Custom engine replica model Brown rather combination best features original models dimensions stroke bore etc faithful Brown design exhaust ports square rather u-shaped provide same efficiency Herb has gone great lengths identify engine through em bossing employing slightly larger dia meter cooling fins distinguish original engines crankshaft ma chined chrome molybdenum steel piston fine grain cast iron mated its cylinder through series machin ing grinding honing finally hand lapping process controlled ten thousandth inch fitted investment cast crankcase fuel sys tem employs cast tank top spring loaded filler formed plastic tank machined needle valve quarter-turn choke assembly Original Browns equipped three ignition timers under slung cast upright timer Hur leman type Herb employs adaption Hurleman timer Point gap regulated eccentric insulator WahI-Brown preceded run 400 40th Anniversary Brown Junior engines After learning 90% special engines wound up collectors shelves Herb felt market flying Brown developed WahI Brown engine decision reinforced fact Herb has five-month backlog orders engine $13950 price tag seems bit high might compare some con temporary mass-produced 60s market today keeping mind essentially handmade engine 370 operations manufacture basic engine 40 done Herb timer assembly requires 57 operations itself Herb also handcrafts Hurleman Continued page 100 Wahi-Brown Junior has effective intake choke simplify starting Quantity built Herb Wahi historic engine has squared exhaust ports loriginal U-shaped portsl Chart gives rpm/prop test figures 52 Model Aviation WAHL-BROWN JUNIOR FUEL 4-1 UNLEADED GASOLINE SAE 70 OIL ELEVATION 2150 FEET TEMPERATURE 5O F PROPRPM 12-6POWER PROP6400 13-5REV UP6400 14-5REV UP6100 Lennart Hodstroni Swedish Wakefield enthusiast Bob Copland designed GB3 Original flown British team member Copland last prewar Wakefield Left US. almost destroyed accident rebuilt flown OS Chi Nats Zaic Sven-Olov Linden plc Assisting George Grosshardt start O&R 2j-powerea Junior Mercury Don Jenkins made first official max Playboy Sr 5th Annual aT contest Wright-Patterson AFB last September says Old Timer just old folks all-important storage envelope using envelope record data about motor store motor between flights Stan assured can eliminate unknowns pre dict model performance quite well contest has lost because wrong motor used critical time Bud Tenny Box 545 Richardson TX 75080 FF Old-Timer/Haught continued page 52 type spark plug test engine like its sisters has run Herb required breaking After mounting engine stand filled tank recommended 4to-i fuel mixture unleaded gasoline SAE 70 oil Brown long stroke high torque engine normally swings 14-inch prop 6 8 pitch prop sup ply included 12- 13- 14-inch props following usual practice breaking engine light propeller load bolted 12-6 engine hand started easily after clocking three revolutions using Herbs recommended needle setting 2 turns instruction sheet calls short initial runs 5 10 seconds followed cool ing period since engine very tight found engine would run about 15 seconds stopping its own after couple tanks engine would con tinue run until fuel exhausted ran suggested ten tanks through engine rich settings before taking rpm reading tached engine 6400 rpm 12-6 Powerprop 13-5 Rev Up gave same reading final run 14-5 Rev Up indicated 6100 rpm tests run within 20 minutes ele vation 2150 feet temperature 500 F Part breaking-in done evening Flame exhaust parts suggested potential fire hazard closely cowled installations fact no doubt con tributing development accessory exhaust stacks Herb also has avail able did notice two minor faults engine First no built-in rachet sys tem prevent needle valve setting change vibration problem exist ed original Brown solved installing short piece fuel tubing tween needle valve proper needle valve body second item relation sharp edge cam cut prop drive washer scraping movable point could readily corrected stoning slight radius edge cam cut As engine belonged Herb did anything about very good engine good smooth power ease handling Herb also manufactures stocks complete line accessories ignition engines well made-to-order Hurle man engines both singles twins Herbs catalog nice addition library included appropriate cartoons Better get waiting list can fly Bud McNorgans contest next year Very First Thermal Central Indiana Aeromodelers CIA Informer Magazine editorialists remind us now first thermal resulting thrill derived therefrom Well too long ago remember saw young Don Jenkins get first max O&R 23 Playboy Jr last Sun day will remember scene year. now acne gone 5 oclock Clarence Haught Rt 5 Box 16 Coeur dAlene ID 83814 Acorns/Fridenmaker continued page 53 duced people both kids par ents modeling improved clubs standing within community great time doing Scouts have fun building flying Scout leaders have welcomed activi ties kids didnt have invest time planning prizes given just inexpensive ribbons pur 100 Model Aviation