Preamble To the Rules from the SAM (USA) web site

The competition flying of free flight and R/C model aircraft of vintage design is intended to be casual, enjoyable and interesting. 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.

Further to the above another classification of model has been added, this being "Nostalgia" which are aircraft from a later period generally up to 1956.

Since virtually all the aircraft from the periods covered were originally designed and built for free flight, some modification is necessary for the conversion to R/C assist, for instance provision for control surfaces. The changes that may or may not be made is covered in the page entitled "Construction Guide".

The Vintagents being the free spirits that they are have devised a number of competitions to keep themselves amused. The rules for these competitions are covered in "Vintagents" Rules.

The rules for the more standardised old timer contests are covered in the page "SAM Rules".

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National Rules

The national rules are set by MAAA and can be viewed as a PDF, view PDF.

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Vintagents Variations to National Rules

Open Duration.

ENGINE RUN TIME ALLOCATION
2 stroke (front induction/side exhaust) --- from 25 seconds to 20 seconds
4 stroke supercharged (ys 53 / ys63) ---- from 25 seconds to 20 seconds
4 stroke glow on standard 10% nitro fuel -- from 30 seconds to 24 seconds
4 stroke glow with greater than 10% nitro -- from 25 seconds to 20 seconds
This represents a 20% reduction
Max flight time remains at 7 minutes

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Open Texaco

FUEL ALLOCATION
Antique diesel-from 4ml / pound to 2.8ml (e.g E.D 3.46 / GB5)
4 stroke glow from 3ml / pound to 2.1 ml
Diesel from 2ml / pound to 1.4ml
This represents a 30% reduction
Fuel allocation to be rounded to the nearest ml or half ml
e.g a 6 pound model with a diesel engine (other than antique) would get 6 x 1.4ml = 8.4ml rounded to 8.5ml
a 4 pound glow engine model would get 8.4ml (8.5ml rounded), 5 pound model 10.5ml ,6 pound model 12.6ml (12.5ml rounded)
Max flight time reduced from 10 minutes to 7 minutes

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Gordon Burford Duration

Plain and ball bearing Burford (taipan) diesel engines up to 2.5cc---from 40 seconds to 30 seconds
Max flight time remains at 5 minutes

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Antique 38

All engine groups are reduced by 30%
The E.D 3.46 run time is reduced from 60 seconds/pound to 42 seconds/pound
The GB5 run time is reduced from 41 seconds/pound to 29 seconds/pound
Max flight time reduced from 10 minutes to 7 minutes