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Evo Launch elastic
Fortunately we keep finding (with difficulty) sensibly priced suitable launch elastics. Usually five metres of heavy duty coloured latex cord on a simple plastic winder frame or spool. We attach a split ring to the towhook end using a reef knot. For safety a few mm of the cord end is tucked in between the split ring halves, opposite the join. This locks the elastic against the inevitable knot slip; it should be checked regularly for integrity especially if wet. The anchor end needs a double reef knot and half hitch or two, forming a small loop. Or use another split (key) ring, similarly locking the short loose end under the metal band. Fasten this newly formed elastic looped around your ground stake/rock/anchorage etc. All knots can show signs of slippage due to the material's microns thick lubricant coating. These knots need keeping tight and compact. For safety check them regularly. This simple elastic launch elastic is capable of lifting a basic Mugi Evo glider to perhaps fifteen metres height. This capability depends on the make, colour and grade of elastic, all these parameters may vary. The elastic is stretched from a secure ground stake, such as a cheap dogscrew, obtainable from pet shops. Screwdrivers are not really up to the job and best avoided as they can be easily dislodged. Such a missile hurtling towards you is memorable but highly dangerous.
We have found this elastic launch method is the best way for beginners to learn R/C flight after initial use of our MugiSim simulator on a personal computer or laptop. The lightweight Evo glider is launched from resting flat on the ground, benefitting from the initial ground effect stability on release. This is very reassuring to newcomers. It gives time to set the pitch correctly before any steering inputs are needed. A transmitter with a primary control mixing facility is required. For those with older gear, we sell a tiny plug-in GWS electronic mixer to give this channel mixing. See the site shop Miscellaneous section. The battery can be any lightweight AAA flat pack, our AA NiMH flat fourpack battery or similar compact cells. Greater height can be gained with launch experience, 'pinging' the Evo at the top of the trajectory and gaining a few extra metres. Our elastic pack has an inner black plastic storage bag to hold both the elastic and winder. It measures about 250x100x40mm and weighs 40g fitting easily into the Mugi kit shipping pack. The elastic is supplied with a Mugi advisory A4 folded leaflet describing safe and efficient use as an Evo launching aid. After use store the rewound elastic and frame in the black bag. This prevents deterioration from sunlight and it's destructive UV rays. Keep the elastic clean and away from oils, if lubricant is needed then water will do, avoiding the knots of course.
This elastic length with split ring end weighs a mere 22g, far less than bungee systems and the like, with no tendency to tangle or be tripped over. The easy, quiet and almost gentle launch will inspire confidence. Sold singly and to Mugi Evo buyers in the first instance.
For hoarders, like my dad, dig out one of those old plastic floppy disc black boxes with the flip-top lid. Ideal long-term dark storage conditions!
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