Control Line NAVY CARRIER Dick Perry OCTOBER s mystery airplane a-kind level bomber manufactured 1932 Consolidated based Fleetster civil transport Modifications included bomb bay doors hatch aft wing gunner flotation gear under wings However Navy found little utility carrier-based level bombers preferring accuracy penetration achievable dive bombers attacking surface ships As result Consolidated XBY-l Bu No 8921 never advanced past testing stage Robert Rambo winner oneyear membership Navy Carrier So ciety correctly identifying XBY- response airplane best ever total 17 correct answers few near-misses thought Lockheed Vega resemblance between two rather close seems Con solidateds Jerry Vultee worked Lock heed prior 1930 thus providing com mon link between two designs allow differences mailing-time magazine distribution relieve trying read badly smudged postmarks future Mystery Plane winners will selected drawing among cor rectly identifying aircraft months carrier aircraft little modern last Good luck 1984 rules effective January 1 1984 will three changes Carrier rules compete builder-of-the-model rule will disappear Carrier events Profile Carrier wingspan limit will increase 50 three warnings will given 600-attitude vio lations eliminating builder-of-the-model rule may increase participation events hope case end result increase quality com petition change will justified increased wingspan Profile will allow aircraft modeled distorting wing outlines excessively will also allow kits qualify particularly Midwest Bf-109 P-SI AD kits can find may encourage some officials become little country Low speed score will zero critical judging Profile models officials detect three excursions bonus points closely resemble beyond 600 limit rule seems very loosely applied None changes will have some areas particularly applied effect way event flown wing planform 600-waming rule will probably result new new slow-flight rule will result records being established after December uniform interpretation throughout 31 17 74 Model Aviation Mystery Plane Contest rules change slightly month winner will selected drawing name among correct entries received Dick Perry send entries him address given end column Prize years membership Navy Carrier Society Two approaches venting Carrier fuel tank Dick has good discussion fuel tank trimming good engine performance column Tank right has adlustable vent pipe know builders insist using Aero Gloss fillets first adding other clear instance Stan Pow ell recent Model Aviation Dove con struction article September 1983 advises using Aero Gloss over fillets switching Sig Lite-Coat clear rest plane Whatever remember Windy states no magic sensible ways channel efforts experiments Nothing substitutes hard work attention detail magic could front row Stan Powell now well just have keep sanding rubbing away Again thanks Windys patience answering letters returned him clarification series have questions comments write him 9 Union Ave Little Ferry NJ 07643 201-440-0905 Wynn Paul 1640 Maywick Dr Lexing ton KY 40504 CL Navy Carrier/Perry Continued oaqe 74 Fuel Tanks common problem among Profile Carrier models tendency engine go lean acceleration rich once airborne problem achieving good engine performance both during takeoff in-flight pro nounced larger venturi intake areas Some modelers have resorted partially closing throttle takeoff opening once airplane airborne Consistent per formance under conditions can hard achieve ideal situation would occur could set needle valve consistently ground say -turn open optimum first break hard two-cycle have engine lean out immediately upon release sagging hold optimum setting through acceleration high-speed flight Its impossible achieve type performance must use variation uniflow tank-venting scheme vent line should end near front tank reduce fuel pressure variations during acceleration should also outboard needle valve achieve good mixture both acceleration high-speed flight vent should end point below carburetorto prevent fuel siphoning through carb before engine started two drawings illustrate tanks used Carl T Tom Schaefer Nats Profile Carrier Open winner airplanes Toms tank little harder adjust doesnt require hole through fuselage vent line tune model high-speed flight first determine needle valve setting richer optimum easily repeatable engine should go good mixture airplane begins move takeoff should go over-lean engine leans out sags must find richer setting move vent tube lower tank next step set in-flight mixture adjusting vent engine too lean can Start richer mixture ground 2 Tilt external vent end pointed directly airstream 3 Move tank internal end vent line entire fuel tank inboard engine too rich flight can Start leaner setting sure engine wont sag takeoff 2 Bend cut external vent pointed less square ly airstream start 450 go 600 900 required 3 Move tank internal end vent line entire fuel tank outboard case moving position vent line relative needle valve will have greatest effect whether accomplished moving vent within tank moving tank itself sure start takeoff full tank duplicate competition conditions following procedure engine can set little rich ground can made perform well throughout takeoff high-speed flight Richard L Perry 7578 Vogels Way Springfield VA 22153 SAFE FLYING IS NO ACCIDENT January 1984 173
Edition: Model Aviation - 1984/01
Page Numbers: 74, 173
Control Line NAVY CARRIER Dick Perry OCTOBER s mystery airplane a-kind level bomber manufactured 1932 Consolidated based Fleetster civil transport Modifications included bomb bay doors hatch aft wing gunner flotation gear under wings However Navy found little utility carrier-based level bombers preferring accuracy penetration achievable dive bombers attacking surface ships As result Consolidated XBY-l Bu No 8921 never advanced past testing stage Robert Rambo winner oneyear membership Navy Carrier So ciety correctly identifying XBY- response airplane best ever total 17 correct answers few near-misses thought Lockheed Vega resemblance between two rather close seems Con solidateds Jerry Vultee worked Lock heed prior 1930 thus providing com mon link between two designs allow differences mailing-time magazine distribution relieve trying read badly smudged postmarks future Mystery Plane winners will selected drawing among cor rectly identifying aircraft months carrier aircraft little modern last Good luck 1984 rules effective January 1 1984 will three changes Carrier rules compete builder-of-the-model rule will disappear Carrier events Profile Carrier wingspan limit will increase 50 three warnings will given 600-attitude vio lations eliminating builder-of-the-model rule may increase participation events hope case end result increase quality com petition change will justified increased wingspan Profile will allow aircraft modeled distorting wing outlines excessively will also allow kits qualify particularly Midwest Bf-109 P-SI AD kits can find may encourage some officials become little country Low speed score will zero critical judging Profile models officials detect three excursions bonus points closely resemble beyond 600 limit rule seems very loosely applied None changes will have some areas particularly applied effect way event flown wing planform 600-waming rule will probably result new new slow-flight rule will result records being established after December uniform interpretation throughout 31 17 74 Model Aviation Mystery Plane Contest rules change slightly month winner will selected drawing name among correct entries received Dick Perry send entries him address given end column Prize years membership Navy Carrier Society Two approaches venting Carrier fuel tank Dick has good discussion fuel tank trimming good engine performance column Tank right has adlustable vent pipe know builders insist using Aero Gloss fillets first adding other clear instance Stan Pow ell recent Model Aviation Dove con struction article September 1983 advises using Aero Gloss over fillets switching Sig Lite-Coat clear rest plane Whatever remember Windy states no magic sensible ways channel efforts experiments Nothing substitutes hard work attention detail magic could front row Stan Powell now well just have keep sanding rubbing away Again thanks Windys patience answering letters returned him clarification series have questions comments write him 9 Union Ave Little Ferry NJ 07643 201-440-0905 Wynn Paul 1640 Maywick Dr Lexing ton KY 40504 CL Navy Carrier/Perry Continued oaqe 74 Fuel Tanks common problem among Profile Carrier models tendency engine go lean acceleration rich once airborne problem achieving good engine performance both during takeoff in-flight pro nounced larger venturi intake areas Some modelers have resorted partially closing throttle takeoff opening once airplane airborne Consistent per formance under conditions can hard achieve ideal situation would occur could set needle valve consistently ground say -turn open optimum first break hard two-cycle have engine lean out immediately upon release sagging hold optimum setting through acceleration high-speed flight Its impossible achieve type performance must use variation uniflow tank-venting scheme vent line should end near front tank reduce fuel pressure variations during acceleration should also outboard needle valve achieve good mixture both acceleration high-speed flight vent should end point below carburetorto prevent fuel siphoning through carb before engine started two drawings illustrate tanks used Carl T Tom Schaefer Nats Profile Carrier Open winner airplanes Toms tank little harder adjust doesnt require hole through fuselage vent line tune model high-speed flight first determine needle valve setting richer optimum easily repeatable engine should go good mixture airplane begins move takeoff should go over-lean engine leans out sags must find richer setting move vent tube lower tank next step set in-flight mixture adjusting vent engine too lean can Start richer mixture ground 2 Tilt external vent end pointed directly airstream 3 Move tank internal end vent line entire fuel tank inboard engine too rich flight can Start leaner setting sure engine wont sag takeoff 2 Bend cut external vent pointed less square ly airstream start 450 go 600 900 required 3 Move tank internal end vent line entire fuel tank outboard case moving position vent line relative needle valve will have greatest effect whether accomplished moving vent within tank moving tank itself sure start takeoff full tank duplicate competition conditions following procedure engine can set little rich ground can made perform well throughout takeoff high-speed flight Richard L Perry 7578 Vogels Way Springfield VA 22153 SAFE FLYING IS NO ACCIDENT January 1984 173