Control-line competitions rules
Taster Stunt (SBMAC version)
Designed to enable personal development with two classes - Basic & Intermediate. Once someone is able to consistently score more than 100 in the Basic class they would be expected to move to Intermediate. Any model and any motor (max 10cc ) . Model may be hand launched. See the scoring sheets below for more information.
Awaiting score sheet loading
Phantom Speed (SBMAC version )
We run 3 different classes. 1.5cc , 2.5cc and Phantom MIte (normally 0.8cc) ( although Mite is timed it is not a competition class - but points awarded for participation). All classes are diesel only. 1.5cc and 2.5cc are timed from ROG for ten laps ( normally 2 flights timed in each class - best flight to count). Mandatory wrist straps for all classes. 1.5/2.5 lines are 42' /0.012" (0.3mm ). Mite are 30' / 0.008" but only 7 laps. Pull test for 1.5cc = 15lbs 2.5cc = 25lbs Mite = 5lbs.
Models may be proxy flown. Models to be as plan or from kit. Bellcrank must be secured to engine bearers. Wing incidence may be reduced to zero.
Voetsak Tribute time trail (SBMAC version)
Voetsak Tribute (70% version of original Voetsak model). may be bulit from plan or kit. Must include dummy fuel tank on fuselage and should have model pilot ( preferably of Ron Moulton). They are flown on 50' lines ( centre of handle to centreline of model). ).012" multistrand. The only engine allowed is an original unmodified AM25 diesel.
We run 2 events.
'Speed' event . 10laps - ROG timed from release. No whipping after lap 1.
Time trial - 60 laps with 1 mandatory pitstop. No fuel cutout to be used. Max time 7 minutes. If 60 laps is reached without a pitstop a 2 minute penalty is added. No carbon or glass filled APC type props allowed. Pull test of 10G minimum. Flown solo after engine warmup , "stop engine " . countdown and "start". 2 flights normally allowed- best to count.
SBMAC EasySpeed
EasySpeed is designed to be a fun 'speed' event where entrants strive to improve on their initial 'target' speed by various tweeks in subsequent events. It is open to any model but must uitilise an unmodified plain bearing diesel engine with max capacity of 1.5cc and only commercially available wooden , plastic or nylon propellers are allowed. The lines will be 13.5m ( Mini- Goodyear lines).with mandatory safety strap. The model will be handlaunched and timing will commence after the second completed lap and will be for 10 laps. Each event will normally allow 3 timed flights with the fastest one to count. At the first event the details of the model and motor will be taken and the best time will be set as the target speed to beat at subsequent events. Any increase will then become the new target speed. At the final event the highest percentage increase over the year will decide the winner.. If , for any reason, the model or motor is changed during the year the new combination will be recorded and a new target speed will be established. Proxy flying is permitted.
KK Champ time trial
Model built from plan or VMC kit. Wing tip weight can be added and any suitable wheels to enable ROG. Any (non schneurle port ) diesel up to 1cc. Lines 35' ( model centre to handle centre ) .012"
diameter. Max. tank size 10cc. Wrist strap mandatory. Timing starts after 5.4.3.2.1. countdown and finishes on completion of 30 laps. Proxy flying is permitted.
SBMAC Oliver Rat Race Rules (as of April 2025 )
Wing Area 85sq in minimum. Tail Area 30sq in minimum
All aircraft are to have a separate tail plane, no FAI style wings
The Contest Director's decision is final regarding the eligibility of any model.
Race always flown over grass.Undercarriage is optional.
Engine: Any Oliver Tiger, real or replica.No limit to tuning.
Lines: 49ft 5in radius, model centreline to the front of the handle grip
0,3mm multistrand wire.
Races: Heats 70laps 1 compulsory pitstop. Finals 150 laps 3 compulsory pitstops All heats and final are flown 2-up.
Cut-out: A working cut-out shall be fitted to the model for safety purposes and may be used in the race. Fuel Tank: No limit on capacity. Refuelling by squash bottle only and the tank must be filled at each pitstop. Prop: Any commercially available thermoplastic or nylon