Everybody is interested in rumors. Rumors are interesting especially if there is some bit of truth in it. I was always fancied by UFO sightings. Hundreds of sightings are reported each year across the world. Theoretically in this broad, never ending universe aliens should exist, that gives some strength to our hope of seeing a UFO. But we never contacted them or have real evidence of their existence (the rumors disagree ofcourse). What keep most of us interested in UFOs is the far more technological power they wield. Flying saucers are of special interest because they are fast and nobody knows what powers them; or is it really so?
I first heard of this effect while reading an article from ideaconnection.com (link here). I wasted no time, went to youtube and found many amazing videos of flying things based on this effect.
So what is Coanda effect?
“The tendency of a jet of fluid emerging from an orifice to follow an adjacent flat or curved surface and to entrain fluid from the surroundings so that a region of lower pressure develops”
Nice definition, but if you are anything like me this video below explains it way better.
Finally the alien technology is ours, if you are half an engineering student you now know how to build a flying saucer.
Brushless motor – 1 nos
Speed controller – 1 nos
Lipo Battery – 1 nos
Propeller – 1 nos
Receiver 5 channels – 1 nos
Servos – 6 nos (4 and 2)
Gyro piezo – 3 nos
a 3 mm thick styrofoam sheet XPS (Depron, Gediplac, Ectrupor),
some 1 mm diameter carbon rods,
a brand new cutter,
To glue the different parts, I recommend you to use UHU Por or special foam Cyanoacrylate (CA) glue.
Instead of struggling with Styrofoam you can use a lightweight plastic bowl. While styrofoam is lightweight there is a chance that the final frame you makeÂ may have some deformations which can adversely affect the flight of the flying saucer, so a plastic bowl is definitely better.
For all the lazy asses like me out there, a pdf containing the materials needed and construction are given at the end of this articleÂ for download.
While this may not work as powerfulÂ as a quadra-copter and may lack in maneuverability I am quiet sure many haven’t seen a flying saucer in real life. This can be used for your final year project but this is mostly a fun project which will gather a lot of audience (pretty faces included) on technical fests.