The Sainte Formula strongly resembles the Bostonian class, but with a smaller size and without bonus for appearance. In the Netherlands the minimum airframe weight is 3 grams, while in most countries 1.5 grams is permitted.
View or download the Sainte Formula Rules (0,3 Mb pdf)
Maximum projected wingspan: 330 mm
Maximum chord of the lifting surfaces, monoplane*: 80 mm
Maximum tail span: 150 mm
Maximum chord of the tail surfaces: 60 mm
Maximum propeller diameter: 150 mm
Maximum propeller blade width: 25 mm
Minimum weight without rubber motor: 3 g
* Biplanes are permitted if the sum of the chords is maximum 100 mm, the minimum chord for each wing is 40 mm.