SOCIETY OF
ANTIQUE MODELERS
Official Rule Book
1997-1998 EDITION
    (This electronic version has been prepared by Dale Hannum and is placed on the International SAM Web site by his generous permission)
PREAMBLE
    The competition flying of free flight and R/C model aircraft of vintage design is intended to be casual, enjoyable and interesting for both competitor and spectator alike, It is neither desired to advance the state-of-the-art of aeromodeling, per se, other than to increase participation in the sport generally, nor to reprove again that which is already recorded in aeromodeling history books.
    The intent of these rules is to categorize the basic types of vintage models and establish an equitable and simple framework of regulations for competition purposes.
    Therefore, model designs that revolutionize flight competition and necessitated the formation of two basic classifications, "Antique" and "Old Timer" are expected to compete in the Old Timer Events.

CONTENTS

FREE FLIGHT OLD TIME RULES

SECTION I - Definitions and Basic Regulations

SECTION II - Modifications

SECTION III - Power and Classes

SECTION IV - Basic Events

SECTION V - Special Events

SECTION VI - Flight Rules

SECTION VII - Rule Change Proposals

SECTION VIII - Records

SECTION IX - Safety

SECTION X - Use of Binoculars:

RADIO CONTROL OLD TIME RULES

SECTION I - AIRCRAFT DEFINITIONS

SECTION II - ENGINE DEFINITIONS

SECTION III - FUELS

SECTION IV - EVENTS DEFINITIONS

SECTION V - CONTEST PROCEDURES

SECTION VI - SPECIAL EVENTS

"SPIRIT OF SAM CONCOURS EVENT"

SOCIETY OF ANTIQUE MODELERS
FREE FLIGHT OLD TIME RULES
The following rules apply to SAM free flight competition events and are complemented by AMA rules for sanctioned events, general and outdoor free flight.

SECTION I - Definitions and Basic Regulations

  1. Old Timer and Antique categories are defined as model aircraft which have been DESIGNED, KITTED, or PLANS PUBLISHED prior to December 31, 1942 and December 31, 1938 respectively. Authentication of design is the responsibility of the contestant. Claims made for prior design date shall be authenticated by documented proof (dated photographs, affidavits, etc.). These shall be submitted to a review board (made up of current SAM officers and as appointed by the SAM President) for approval. These authenticated prior designs will be published as a supplement to the rule book, in a hand book entitled the Society of Antique Modelers Approved Designs List.
  2. Models shall be flown in one of the following categories.
  3. Antique Category ;models shall be powered with original ignition engines only and be divided into two events: Fuel allotment Antique (6 ft. minimum wing-span) and 30 second Antique (no size limitations). The 30 second Antique models shall weigh a minimum of 8 oz. Per sq. ft. of projected wing area. This event is limited to non-pylon models only. The use of diesel engines is not permitted in the antique events.
  4. Old Timer Fuselage and Pylon models shall weigh a minimum of 8 oz. Per sq. ft. of wing area (projected).
  5. Ignition engines are defined as those engines using cam operated points, spark plugs, batteries, and coil (or magneto) to ignite the fuel.
  6. Any fuel may be used in ignition engines with the exception of nitromethane, nitropropane, or nitrobenzine. Engine shut-off must be accomplished by the use of and ignition circuit-breaker. No other method of stopping the engine will be allowed.
  7. Rubber models must use the same prop design as on original model (folding, single blade, free-wheeling, etc.). Maximum diameter shall be that shown on the plan or 1/3 of the flat wingspan, which ever is greater. No limit on the amount of rubber used.
  8. Unless otherwise stated, each contestant will be allowed two (2) models in an event to complete three (3) official flights.
  9. Rubber scale event: Models shall be models of an actual large scale aircraft built to requirements of Section I Par. 1. Models may be hand launched or ROG'ed into flight. The maximum duration of flights and the number of flights per event will be determined by the Contest Director. The total time of the flights will determine the contestant's score. There will be no scale judging. Authenticity shall be determined per Section II, Par. 2. The propeller(s) shall be as shown on the plans except when the plan shows a small (nonflyable propeller). The diameter of the propeller can be increased up to 1/3 wingspan. Free-wheeling will be allowed on the props where the plan is dated 1935 or later.
  10. Commercial Rubber special event: A rubber power model kitted, published, or authenticated prior to 1943. Maximum wingspan is 36" projected. Model must be flown in it's original size (no scaling) with original dihedral. The rubber motor must be enclosed in the fuselage and the plans must not show a folding propeller. If the prop shaft is shown fixed to the propeller, it may be modified into a free wheeler. Propeller diameter shown on the plan is the maximum allowed; or if no propeller is shown on plan, the maximum diameter is 1/3 of the flat wingspan, whichever is greater. Propeller may be any pitch and must be wood, except plastic may be used if the original model used plastic. No limit on rubber motor size or model weight, but reducing wood sizes and covering material to lighten is not allowed. Strengthening and adding additional spars is permitted. Model must have a landing gear to permit ROG, but the ROG takeoff is at the descretion of the Contest Director, 6 attempts for 3 official flights is the score. Three minute maxes.
  11. Unless otherwise stated, the "Builder of the Model rule" as defined by AMA is in effect for all SAM free flight events.

SECTION II - Modifications
  1. A Old Timer or Antique may be modified only in the following was: minor changes to thrustlines, i.e., upright instead of inverted engines; strengthening of structures and provision for dethermalizing. Area and moments may not be changed. All changes must be in the character of the original model, i.e., substitution of sheet balsa fuselage for original builtup structure is NOT approved. Beef up the builtups! Flat air foils may not be substituted for cambered airfoils, NO enlargement or reduction of model size..
  1. It shall be the responsibility of the contestant to prove the validity of the model and the fidelity to the design by submitting the actual construction prints to the Contest Director upon request.
  2. No modifications may be made which would prevent the model from making normal, unassisted ROG takeoffs. Therefore, no dropping gears, NO VTO, and no catapult devices are approved. Two wheels may be substituted for single wheel gear, but one wheel may not be substituted for two wheel gear.

SECTION III - Power and Classes
  1. Except as provided elsewhere, Old Timer models may be flown with either ignition, glow (see special events), or diesel engines.
  2. For basic SAM events, ignition engines shall be limited to original ignition engines, or diesels manufactured prior to January 1, 1950 or approved glow engine conversions to spark ignition.
  3. Ignition engines manufactured prior to January 1, 1950, converted to glow by manufacturer, with minor modification, will be considered to be an original ignition engine when converted back to ignition.
  4. Replicas of original ignition engines and bearing the same name shall be considered to be an original ignition engine.
  5. Custom and production ignition engines designed and manufactured after December 31, 1949 shall be limited by the same rules applied to approved glow conversion engines, Unless:
  6. Approved glow engine conversions shall be non-Schnuerle ported only.
  7. Classes of Old Timers shall be established by engine displacement (cubic inches) as follows:
  8. Engines above .65 cu. In. displacement must be spark ignition and have been manufactured prior to 1950.
  9. Diesel engines manufactured prior to 1950 shall be termed as original spark ignition engines for classfification purposes.

SECTION IV -  Basic Events
  1. These events which conform to Sections I, II, & III above, specifically as pertains to construction, classes, categories and definitions. These events shall be:
  1. Stick Rubber models are those built to cross-section rule not greater than L2/200, where L equals length of fuselage and are hand launched.
  2. Fuselage Rubber models are those built to a cross-section rule not less than L2/100 and must ROG unless combined with stick rubber as a single event in which case they may be hand launched.
  3. Class-size separation for both stick and fuselage rubber models is as follows:
  4.  Hand Launched Glider designs which were published or kitted prior to December 31, 1942 are allowed. The models are to be faithfully reproduced except as follows:

SECTION V - Special Events
  1. Provisions are made for the flying of special vintage or Old Timer type events.
  2. Any event which deviates from the requirements of the Basic Events shall be termed a Special Event (half size, .020 Replica, gas scale, etc.)
  3. Special Events shall be in keeping with the intent of the PREAMBLE.
F/F SPECIAL EVENTS

The following is a partial list of events that fall under SECTION V Special Events. These events are frequently regional and are included here as a guideline for establishing other special events. Unless specifically spelled out in these special events, all basic rules (such as construction, scale, etc.) apply.

½ A TEXACO -Any pre-1939 gas model design powered by a glow ignition engine. Maximum displacement of the engine shall be .051. Engines may be reed or rotary valve induction design. Diesels and diesel conversions shall not be allowed. No size or weight limitations. Model may be scaled up or down from the original. Construction shall follow the form of the original. Wood sizes may be scaled to agree with the model's scale.

GAS SCALE - A casual event. Scale model of any aircraft built prior to January 1943. Plans may come from any source. No scale points awarded. Must be of built up construction (no sheet balsa or profile type models). Any internal combustion engine may be used. Unlimited flight time. Longest of three flights scores.

TEXACO - Any pre-January 1939 design powered with an ingition engine (see Section I. Par 5) fuel allocation will be ¼ ounce of fuel per pound of model weight up to 1 ¾ ounces of fuel maximum. Timer goes with contestant. Model must ROG. Longest of two flight scores. A flight of less than 4 minutes is considered an attempt.

TOWLINE GLIDER- Generally covers pre-Nordic designs built to the L2/100 cross section rules. Auto rudders not allowed unless shown on original plans. Maximum of 200 foot towline.

POST '42 EVENT - (ignition on the planes rule) - Identical to all other points in Sections I, II, & III, except that the cut-off date of December 31, 1942 is removed and extended to include any model which shows an ignition installation on the original plans.

OLD RULER - Any model that meets the requirements of the 1941 AMA Rules is eligible for this event. Minimum cross-section L2/100 and 8 ounces per square foot wing loading, 80 ounces per cubic inch displacement power loading. Model may be an original design.

REPLICA .020 POWER - Model of any gas model kitted or plans published prior to January 1943. Gas Type rubber models like Comet's rubber powered Clipper;, Scientific's Flea, etc., is okay. Model may be scaled version of larger model of the period. Two wheel gear may be substituted for single wheel. Conctruction at the discretion of the modeler. Airfoils may be modified, but must retain the characteristic shape of the original i.e., RAF 32 Type, NACA 6409 Type. Single surface Type, Clark Y type, etc. Twenty (20) second engine run, ROG. Maximum engine displacement .020 cu. In.

COMPRESSED AIR - Any model (may be original design) powered by a C/A motor. Maximum air pressure of 150 lbs. Per sq. in. Models must ROG. Three best of six flights score.

TWIN PUSHER - For original twin pusher models meeting pre January 1943 requirement. All models entered in event are launched at same time and last model down wins event.

SECTION VI - Flight Rules

  1. 30 Second Antique models are allowed a 30 second engine run and takeoff ROG.
  2. Fuel Allotment Antique models are allowed 1/8 ounce of fuel per pound of model weight, with a maximum model weight of seven (7) Pounds. ROG takeoff required.
  3. Where practical engine runs for Old Timer category models shall be:
  4. An official flight in all Old Timer and Antique Events is a flight where the model remains airborne more than 40 seconds after launching.
  5. Flights under 40 seconds will be considered as attempts.
  6. Engine overruns will automatically cause the flight to be recorded as an attempt.
  7. Six (6) attempts will be allowed to make three (3) official flights.
  8. Thermal detection devices such as thermal sniffers, electronic thermal detectors, bubble machines and mylar ribbons shall not be used to assist the contestant in determining the optimum time of a launch of his model.

SECTION VII - Rule Change Proposals
  1. Refer to the Society of Antique Modelers Constitution Article VIII.

SECTION VIII - Records
  1. No official records will be established in any of the Old Timer events or categories.

SECTION IX -Safety
  1. All pertinent AMA Safety Rules, not covered above, shall be in effect covering the model, modeler, and equipment.

SECTION X - Use of Binoculars: The use of binoculars or other timing aids by the timekeeper (s) for an official flight is permissible, but not required.
 
SOCIETY OF ANTIQUE MODELERS
RADIO CONTROL OLD TIME RULES

The following rules apply to SAM R/C competition events and are complemented by Section III, paragraphs 3, 4, & 5 of the SAM F/F rules, and by all AMA rules for sanctioned events, general R/C and safety.

SECTION I - AIRCRAFT DEFINITIONS

  1. Old Timer (OT) and Antique categories are defined as aircraft which have been DESIGNED, KITTED, or PLANS PUBLISHED prior to December 31, 1942 and December 31, 1938 respectively. Authentication of design is the responsibility of the contestant. Claims made for prior design date shall be authenticated by documented proof (dated photographs, affidavits, etc.). These shall be submitted to a review board (made up of current SAM officers and as appointed by the SAM President) for approval. These authenticated prior designs will be published as a supplement to the rule book, in a hand book entitled the Society of Antique Modelers Approved Designs List. All powered R/C models including 1/2 A Texaco, must have originally been gas powered (i.e. no rubber models).
  2. The contestant must, if requested, prove the fidelity to the original design by submitting to the Contest Director (C.D.) a copy of the original, or authenticated blueprints from which the model was built, or scaled.
  3. In SAM R/C, no distinction is made between fuselage (cabin) and pylon designs, nor is a "builder of the model" rule in effect.
  4. Aircraft types Explained:
  5. All SAM R/C models must weigh a minimum of 10 oz. per square foot of planform wing area, except for 1/2 A Texaco models, which must weigh a minimum of 8 ounces per square foot.
  6. All glow and converted ignition engine powered models must have a minimum of 225 square inches of wing area per .1 cubic inch of engine displacement.
  7. All models may be modified in the following ways: Minor changes to the thrust line, i.e., upright instead of inverted engines; strengthening or lightening of structures and provision for control surfaces. Foam plastic may not be used as a structural material. Outlines, areas, moments and cross sections may not be changed except for direct scaling, Airfoil sections must be the same as on the original model or plans. Landing gears must be in the same location as on the original model; however, single wheeled main landing gear designs may be modified to dual wheeled main landing gear designs. All changes must be in the character of the original ship. This includes wheel sizes and dihedral, which shall be the same dimensions as the original model when the model is unscaled, or shall be increased or decreased by the same ration on scaled up or down models.
  8. No modifications may be made which would prevent the model from making normal, unassisted rise off ground (ROG) takeoffs. Therefore, no dropping gears (except "Mystery Man" model), no VTO, and no catapult devices are approved.
  9. For the purposes of determining wing area of a flying wing, 1/3 of the wing area shall be considered stabilizing area.
  10. It is permissible to scale any approved design up or down, except Pure Antique models.
  11. For safety reasons, all models except 1/2 A Texaco must have a functioning R/C controlled engine cutoff.
  12. Only fixed pitch, non-folding two bladed propellers made of wood, injection molded plastic, or continuous fiberglass strand and plastic shall be permitted.

SECTION II - ENGINE DEFINITIONS
  1. All engines must be of conventional reciprocating piston design. No turbines, Wankels or other non-reciprocating designs allowed. Old Timer and Antique models may be flown with original ignition, converted ignition, deisel, or glow engines as described below. Supercharged or turbo charged engines are prohibited.
  2. Engine classes are based on the following displacements;

  3.  
    CLASS
    CUBIC INCHES
    1/2 A
    0.000 to 0.049
    A
    0.000 to 0.200
    B
    0.201 to 0.300
    C
    0.301 to 0.650
    Original (pre-1950) ignition engines up to 1.2 cubic inches may also be used in class C.
     
  4. Tuned pipes, tuned mufflers, or other exhaust attachments which increase engine performance are prohibited. Mufflers which do not increase performance are allowed on any engine..
  5. Only engines of the type and specific displacements listed in this section may be used in SAM basic events.

SECTION III - FUELS
  1. Ignition engines may use gasoline and lubricants. FAI fuel (methanol and lubricants only, no nitro or other additives) is allowed.
  2. Diesels and glow engines may use any fuel that has not been banned by AMA for safety reasons.
  3. 1/2 A Texaco engines may use no gasoline based fuels or additives. They may use only commercially available glow fuel, or any percentage blend of alcohol, nitromethane, propylene oxide, and lubricants.

SECTION IV - EVENTS DEFINITIONS
  1. All events are basically climb and glide, with flight scores accumulated at one point per second. Flight time is started at the moment the model is released for immediate takeoff, and ended when it next touches the ground, or some stationary object on the ground.
  2. Engine run times are based on either a specific number of seconds, according to some combination of engine types and/or model weight, or by a specific allotment of fuel based on engine type and/or model weight.
  3. All events except Texaco have maximum or "max" times beyond which no further flight points are accumulated during any one flight. For these events the total of all official flights is taken for scoring. In Texaco, the single longest flight determines the score.
  4. In each event, a limited number of flights, or flight aborts called "attempts" is allowed, during which the contestant must accumulate his official flights for that event. When the official flights are first completed, or attempts exhausted, the entrant may make no more flights, even if some official scores are zero.
  5. Allowable attempts and flight maxes are as follows:

  6.  
    ALLOWABLE
    OFFICIAL
    MAXIMUM TIMES
    EVENT
    ATTEMPTS
    FLIGHTS SCORED
     IN MINUTES 
    LER 
     6
    7 
    Antique 
    6
    3
    10
    1/2 A Texaco
    3
    2
    15
    Texaco
    3
    best 1 of 2
    unlimited
     
  7. Engine run times by engine types for Antique and LER events are as follows:

  8.  
    Schnuerle
    Cross
    Converted
    Original
    glow
    scavenged
    ignition
    ignition
    Event
    engines
    glow
    engines
    engines
    LER
    18 secs.
    23 secs.
    28 secs.
    35 secs.
    Antique
    5 sec/lb.
    6 sec/lb.
    7 sec/lb.
    8 sec/lb.
     
  9. Engine run time starts when the model is released for take-off, and ends when the required R/C shutoff has been activated and the engine stopped.
  10. Fuel allotments are as follows: For Texaco a contest official measures and fuels the engine with 4 cc/lb. of aircraft weight. For 1/2 A Texaco the 5.1 cc fuel tank may be filled by the contestant.
  11. In Texaco and Antique events, the measured weight of the model is rounded off to the nearest pound -e.g.: 5 lb. 8 oz. to 6 lb.; and 5 lb. 7 oz. to 5 lb. for fuel allotment engine run purposes only.
  12. The CD must insure that everyone has a reasonable opportunity to fly and thus may reduce engine runs/flight maxes as necessary.

SECTION V - CONTEST PROCEDURES
  1. The following basic R/C events shall be flown at all SAM Championship meets, and will be used as the basis for determining an overall R/C Ignition Champion and an overall R/C Glow Champion by awarding 5 championship points for each first place, 4 for second, etc. down to 1 point for fifth place.

  2.  
    IGNITION
    GLOW
    A. Class A O/T [LER] Ignition F. Class A O/T Glow
    B. Class B O/T [LER] Ignition G. Class B O/T Glow
    C. Class C O/T [LER] Ignition H. Class C O/T Glow
    D. Pure Antique 
        [original ignition engine, no scaling]
    I. Antique Glow 
        [glow or ignition, scaling allowed]
    E. Texaco (ignition engine) J. Texaco (glow or diesel engine)
    K. 1/2 A Texaco
    There is only one Texaco Event -- separation is for championship points only.
     
  3.  In local contests, the CD may combine LER classes, and Antique classes and events if there are fewer than 5 entrants in any one class of event.
  4. In local and regional events the CD may select the classes he wishes to fly and in such meets may try new concepts as "special events" to determine their practicality. The CD must in this case pre-publish and distribute written contest information stating the events to be flown, and deviations from these rules, and the specific rules for any new events.
  5. The CD shall call a meeting of all contestants prior to the start of a contest to inform them of the rules and any changes he designates due to peculiar field conditions. It is the responsibility of the contestant to be aware of all rules for those events in which he is competing.
  6. All models must rise off the ground (ROG). This rule may be altered by the CD to permit hand launching only if the field is to rough, muddy, or grassy.
  7. The CD will determine fly off rules in case of ties.
  8. Only one contestant may fly a particular plane in a given event. He, or another may fly the same plane in other events. Unless otherwise stated, each contestant will be allowed one (1) model in an event to complete the required official flights.
  9. All models must land by coming to rest completely within an area designated by the CD. Models landing outside the designated field area will be given a zero score, unless the flight has otherwise qualified as an attempt and the model cannot be safely landed within the designated area.
  10. Attempts are defined as follows:
  11. The timer must see the model released to start the flight and must see the model land on the field to conclude the flight score. It is not necessary that he have the model in view at all times during the flight. To prevent loss of a model, binoculars may be used only during a declared emergency to aid the pilot in returning the model directly to the field.
  12. Thermal aid equipment, such as thermal sniffers are not allowed.
  13. There will be no time limit nor penalty imposed on the landing of a model. However to prevent delays, the contestant must land as soon as possible after a "max" flight is achieved, or an attempt made.

SECTION VI - SPECIAL EVENTS

Special events are similar to supplemental and provisional rules as defined on page 2 of the 1994-95 AMA regulations booklet. They may be one-shot trial events, or they may be flown frequently to test their viability as future basic events. The following special events are currently recognized:

  1. Old Time Electric-Limited Motor Run (LMR) and Texaco
  •  H. Electric Texaco Flight Rules
    1. There are no maximum motor run times. The motor may be stopped and started one or more times until the battery back is exhausted.
    2. There shall be 2 attempts allowed for 2 official flights. An attempt may be called only during the first 2 minutes of the flight.
    3. Maximum flight time is unlimited unless the CD places limits the day fo the contest due to contest conditions or possible high number of frequency conflicts..
    4. The score will be the single longest flight.
  • 2. 1/2 A Scale Duration
  • Ohlsson Sideport
  • Ohlsson 23
  • Brown Jr. LER
  • Brown Jr. Texaco
  • R/C Assist Nostalgia
  • O/T Glider
  • Class A Texaco
  • "SPIRIT OF SAM CONCOURS EVENT"

    A just-for-fun event for R/C and F/F models in which the flyers themselves decide which of the models entered best represents that spirit of imagination, experimentation and craftsmanship which characterized the early days of aeromodeling.

    It is an event for those old time models, while not necessarily competitive under current duration based rules, nevertheless reward flyer and spectator alike with the pleasure of seeing them take gracefully to the air.

    Rule 1.  Any model which qualifies under SAM rules as an Antique or Old Timer, designed originally for gas powered freeflight or gas flying scale shall be eligible of entry. There are no restrictions on engine size or type used. (This includes electric motors). There are no wing area or power loading requirements.
     
    Rule 2. No documentation, formal judging, or timed flights are required. The models entered in this event are expected to fly at least once during the general contest. The flight shall consist of take-off or hand-launch, climb for altitude, power cutoff, and glide to a landing. It is recommed that this one flight be kept under five minutes and that one or more of the other flyers entered in this event, or the contest director, be invited to observe the qualifying flight. Other flights may be made, as time permits, if the contestant wishes to demonstrate the flight qualities of his model.

    Rule 3. A model that is also entered in one of the duration based competitive SAM events need not make a special flight to qualify for the "Spirit of SAM" Concours event.

    Rule 4. Models entered in the Spirt of SAM event will be identified with a number assigned by the contest director while they are on display to assist in the voting process.

    Rule 5. All participants in the general contest, whether entered in the Spirit of SAM Concours event or not, will be invited to cast a vote, using special ballots provided by the contest director for their choice. In making the choice, such factors as use of appropriate materials, (construction techniques, uniqueness and special interest) of the design, complexity, general workmanship and graceful flight characteristics should be taken into account. Criteria for selection are deliberately vague. Each participant should choose the model which best represents his concept of the "Spirit of SAM."

    Rule 6. The contest director shall count the ballots, verify that each model has performed its required flight, and announce the winners. There will be five awards presented at the SAM CHAMPS (first through fifth place) and the Spirit of SAM Concours perpetual award shall also be presented to the first place model. The modeler winning the award will be allowed to keep the perpetual award for one year and be responsible to return the award to the contest director of the SAM CHAMPS prior to the next annual meeting. Should the officers of the Society of Antique Modelers decide to terminate the holding of this event, on an annual basis, the perpetual award shall be returned to the Society.

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