BMFA PROVISIONAL CLASS - KIT SCALE

GENERAL

Competition is open to any model built from a commercial kit that meets the definition of an indoor scale model:    

Maximum weight…………………………………………….150g (including motor)

Maximum wing loading…….………………………………………………..15g/dm²

Motive Power…………………………………………………rubber, CO₂ or electric

No declaration as to compliance is required from the competitor but the judges reserve the right to weigh and exclude any model they suspect of being overweight. 

Models may be built from kit parts or the builder’s own wood, but the kit plan must be provided as authentication.

The only modifications permitted from the original kit are those associated with fitting an alternative power source, a replacement propeller (including for rubber) and wheels.

  DOCUMENTATION

The only documentation required is the original (or photocopy) of the plan from which the model was built and one photograph, drawing or painting (eg box art) of either the aircraft modelled or a similar aircraft from the same era to authenticate the general colour scheme and markings.

  STATIC MARKING

For static scoring, all models will be assembled together and placed in order of merit by one or two experienced judges.  Points will be awarded up to the maximum of 100 to reflect the relative quality of workmanship and character of the models.  It is expected that most models will have a coloured tissue finish with painted, printed, transfer or tissue markings.  Fully painted models will not be excluded but will have 5 marks deducted from their ‘order of merit’ static score.   5 marks will also be deducted for each significant deviation from the original design other than those permitted above. (eg increased dihedral, separate control surfaces where these are not shown on the plan)

  FLYING

Definition of an Official Flight

An official flight will be recorded when the model has been airborne for 10 seconds.  However, longer flights will generally score more highly for realism.

  Number of Flights

Each competitor will have the opportunity to make between 4 and 6 flights, depending on the number of entrants and time available. 

  Marking

Each phase of the flight will be awarded marks between 0 and 10 by each judge during the flight as follows:

(a)           Take-off (Optional) and Initial Climb¹

(b)           Descent and Landing Approach

(c)           Quality of Landing

  In addition, the overall realism (speed, ‘sit’, stability and character) throughout the flight will be marked between 0 and 20.

Note 1: the maximum score for phase (a) from a hand launch will be 5.

  Flight Score

The flight score will be the aggregate of the 2 highest scores awarded by each of 2 judges.  If only one flight judge is available, the flight scores will be doubled. 

  Total Score

The total score will be the aggregate of the static mark and flight score (Maximum 300).  In the event of a tie, the model with the higher flight score will take the higher place.