Nederlandse tekst

Sainte Formula

Introduction

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.

Geste by Gé Brouwer

Sainte Formula rules

Definition:

Model aircraft designed to be flown in an enclosed space and which are powered by rubber motors enclosed in the fuselage, and in which lift is generated by aerodynamic forces acting on surfaces remaining fixed in flight, except for changes of camber or incidence.

Characteristics of Indoor Model Aircraft Sainte Formula

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.

The rubber motor is enclosed in the fuselage, gears are not allowed. Motor length and cross section are not limited.
The fuselage has a minimum cross section of 30 x 40 mm over at least 50 mm of its length. The fuse is covered at both sides, upperside and lower side. The fuselage must have a transparent windshield or canopy with a frontal and side area of at least 2 cm2.
The covering of the model may consist of any material except microfilm.
The landing gear consists of 2 legs with freely rotating wheels with a minimum diameter of 18 mm.

Number of flights saintilator by Wout Moerman

The competitor shall be allowed 6 flights of which at least 2 are Rise Of Ground (ROG)
The best 2 flights, of which at least one ROG, will be taken for classification.

Definition of an Official Flight

Only flights of 10 seconds or more will be considered as official. A flight of less than 10 seconds duration will be considered a delayed flight.

Plans

A good start is the HobbyShopper EZB by Larry Coslick on the IndoorDuration website.
On the same website you can download the John Tipper's Sweeps F1L Plan (Acrobat .pdf) from INAV 106.
Also a good article about building and flying EZB can be found here.
Or download the Cargolifter Loafer F1L from Indoor News and Views, a good beginning F1L by Laurie Barr.

Records

Sainte Formula record Jan Massinkhal (ceiling less than 8 m)

 

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last update: 28 feb 2016