ALL MODIFICATIONS ARE THE PILOTS RESPONSIBILITY
TO ENSURE THEIR OWN PERSONAL SAFETY
AND THE SAFETY OF OTHERS
Short description by Michel Carnet:-
Bungee 12mm section.
Remove plastic handle and knot the bungee through itself and the pull cord.
The bungee loop is about 15cm.
More comprehensive description by Stuart Savage:-
How effective is it? Well if you've fitted it correctly, it works really well. Having your arm(s) just about fully extended when trying to pull the motor through the initial compression stroke, is far easier then trying to do it with your elbow at a right angle. The elastic in the bungee then quickly spins the motor through the next few revolutions while your hand(s) hardly move and hopefully it starts.
Buy a metre of the thickest bungee cord from B&Q, usually 10mm dia, but 12mm may(?) be better if you have a large cc high/ compression motor (Ros 125). Try a boat chandlers for 12mm.
Use a 10" to 12" loop to replace the T shaped pull handle, either tied together with knots or using a hose clamp (you will need to double back the ends of the bungee and run them through the hose clamp again or it will pull through). You will need to keep about 2" to 3" of the rubber tube over the the starter cord between the knot and the pulley to absorb any kick back misfires.
The loop stores resting on the netting, ( MAYBE NOT A GOOD IDEA ) in a perfect location where I can easily hook my thumb through the loop without letting go of the brake handle and start in flight. The loop makes it easier to use 2 hands on the ground as well.
Finally, make sure the bungee loop can't fall back through the netting to interfere with the prop.
ALWAYS CHECK IT IS SAFE TO DO SO BEFORE MODIFYING YOUR EQUIPMENT
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