E2K Model Dimensions and Rules 2017



1 Fuselage

1-1 The motor bulkhead shall be a minimum of 2 1/4" X 2 1/4" (57.15mm x 57.15mm) The motor will be mounted directly on to the bulkhead. No cowling of the motor is allowed.

1-2 Cross section measured at the wing trailing edge shall be a minimum of 2 1/4" X 2 1/4" (57.15mm x 57.15mm).

1-3 The fuselage at the deepest point shall measure a minimum of 2 1/4" wide X 3 1/4" (57.15mm x 82.55mm) deep, including the wing section and shall occur somewhere between the wing cord.

1-4 Wing fairings, fillets or motor cowlings are not allowed.

1-5 Maximum radius of the fuselage corners will be 1/4" (6.35mm).

2 Wing

2-1 The wing shall have a minimum span of 35" (889mm) and shall be a constant cord.

2.2 The minimum wing thickness shall be 7/8" (22.22mm) for the 35" (889mm) span.

2-4. The minimum wing area shall be 300 sq. inches (19.36dm2).

3 Powertrain


3-1. Batteries – Any battery may be used, with a maximum of four cells and that, including any attached wires and connectors, does not weigh more than 270 grms.

3-2. The only motors permitted will be :


Turnigy  SK3536-1400kv Aerodrive XP Outrunner.

Overlander Thumper  3536/05 Outrunner all versions

NTM Prop drive series 35-36A 1400KV

3-3 Motors may not be tuned or modified to increase the performance and can only be repaired using standard replacement parts.

3-4 The motor must be capable of being throttled on demand.

3-5 The motor must be fitted with a rounded spinner nut or a 1 1/2" (38.1mm) minimum diameter plastic spinner.

The only permitted speed controllers are those that have been flashed to limit the rpm to no more than 15,232 rpm. Flashed speed controllers are currently available from the C2000 Association


3-7 In the interests of safety the excess of the motor shaft can be ground off the rear of the motor.


3-8 As an economic repair scheme, the prop driver casting can be secured to the magnet housing by the use of a maximum of 4 small bolts..

4 Propeller

4-1 The only allowable propeller is the APC 8x8 propeller. Changes to the propeller blades are not permitted. For the purpose of balancing, changes shall be done to the thickness of one blade only. (Removal of material/mass). Edges and tips may be sanded, but only as much as necessary to remove sharp moulding flash (deburr).

6 Radio

6-1 The model will have a minimum of three channel radio controlling ailerons, elevator and throttle.

7 Materials


7-1. The use of carbon fibre is not allowed anywhere within the model.

8 Weight

8-1. The minimum weight of the model shall be no less than 2.25lbs (1022g) and a maximum weight of not more than 3 3/4lbs (1705g) ready to fly.


E2K Race Procedure



Course size is 120 ft (36.576Mtrs) between base pylons and 380 ft (115.824Mtrs) from the base pylons to the No.1 pylon. The start line is to be 60ft (18.288Mtrs) from the base pylons. The four launching positions will be marked at 15ft (4.572Mtrs) intervals along the start line centre to the course. The pylons should be a minimum of 15ft (4.572Mtrs) high and surmounted by a square flag, the top of the No1 pylon should be above the horizon if possible. A sighting pole is to be positioned adjacent to the No.1 pylon at 90 degree to the centre line of the course. Up to four timekeepers will be used and will be responsible for the recording of the race times. Up to four flag marshals will be used to indicate when a model has reached No1 pylon. These marshals are also responsible for reporting any No1 infringements. A minimum of one pylon judge per pylon will be employed to report any pylon infringements at No’s 2 and 3 pylon. Course layout is therefore a long triangle and should be set with the wind blowing from the No1 pylon towards the base pylons. The method of flying the course will be anti clockwise. It is the responsibility of the contest director to ensure the accurate positioning of all pylon marshals relative to the flight path of the models.



10 Midair Collisions


In the event of a midair collision all models in that heat are to land immediately, all participants involved will have a re-run that will take place at the end of the round in which the collision took place. A maximum of 10 minutes will be allowed for preparation time to allow competitors to prepare a spare model for the re-run.



11 Starting Procedure


The race will consist of a maximum of four competitors and will be of 10 laps distance. Following the identification process a 2 minute readiness time will be allowed on the start line to prepare the model for flight. The starter will signal the start of the race with the drop of a flag whereby all models in that heat will be launched simultaneously. No model is to be launched after the leading model has completed the first lap. Should any model crash or not get away it is not to be retrieved until the end of the race. Pilots and callers must stand behind the start line at all times during the race. 



12 Timekeeping


A timekeeper, equipped with a stopwatch will be allocated to each competitor during the model identification process. The model is to be launched from behind the start line. Any model deemed to have been launched prematurely or forward of the startline will be subject to a 10% time penalty (which will count as 1 cut) being added to the total time. Any pilot causing his model to cut inside a pylon will have a 10% time penalty added to his time. Two cuts in the same heat will result in that pilot being disqualified from that heat. Should any dispute arise regarding lap timing / counting or flagging errors the Competition Director’s (CD) decision will be final.



13 Dangerous Flying


Low flying is consistent flying below pylon height. The CD may issue a warning for low flying, if the competitor continues to fly low, in subsequent heats, the CD reserves the right to disqualify the perpetrator from that heat or the meeting.


14 Model Processing


The CD reserves the right to check, or have checked, all models for all aspects of compliance with these regulations. Any model found to be outside the rules will be disqualified. Any competitor who has raced a model that has subsequently been checked and found to be outside the rules will be excluded from that heat. The offence of exclusion will carry the application of a maximum time penalty. Any heat from which a competitor has been excluded cannot count as a dropped score and will count towards the final score.


15 Protective Clothing


All competitors, helpers, timekeepers, flag marshals and race officials are to wear hard hats at all times whilst racing is in progress.



16 Number of Heats Flown


To account for weather conditions and other possible interruptions to the race day programme the number of heats that will count towards final scores will be as following:


Number of Heats Flown

Number of Heats Counting


































17 Scoring


If numbers and time permits, the pilots with the lowest aggregate total time from the number of heats flown will take part in two semi finals and a final  to determine the top eight positions. League points will be awarded in descending order from 8 down to 1 for the top eight competitors. The points attained will then go towards determining an overall E2K champion at the end of the flying season.  The number of race meeting points to count will be in the same proportion as the table in rule 16.



18 Insurance / Affiliation


All competitors are to be in possession of current BMFA insurance.



Whilst they may be open to misinterpretation, any decision regarding infringement of the rules will be at the discretion of the acting contest director.