Anticipating the Delta Twister

(Image from the Otona no Kagku site, used for review purposes only.)

The Delta Twister kit hit the shelves in Tokyo on the 17th, but it won’t reach me in Kyushu until closer to May 20.  In the meantime I can make a few comments on it while I’m waiting.  If you watch the youtube videos, you can see that this kit has a much longer hang time than either the ornithopter or entomopter had.  Depending on how much the rubber band is wound up, and whether there’s any wind, the Delta can stay airborne for up to 30 seconds.  And, while the spec given in the newsletter says that it can travel 10 to 30 meters, the videos show that the Delta tends to go around in circles.  So, actual distance from you after you throw it depends on whether you can trim it to hold a straight line.

The assembly instructions aren’t that different from the entomopter. There look to be about 40 parts, with a suggested assembly time of 60 minutes.  The main difference will be in assembling the back wing and the handheld launcher.  Then, there’s also the option of putting in the DC motor.  This is not a simple matter.  You’re not going to be able to quickly switch out the rubber band for the motor and then go back right away.  Page 1 of the PDF is the parts list. Page 2 shows the assembly of the body, and 3 is the assembly of the wings and mounting the rubber band.  Page 4 starts out with removing the rubber band and routing the wiring for the motor and the capacitor.  I was wondering how the cap. would be recharged, and the answer is given in the second half of page 4 – the handheld launcher holds 2 AA batteries, which connect to two small contacts at the bottom of the capacitor.

If you’re going to use the Twister for a science class, and if you have a large enough budget to accommodate the import markup, you may want to buy two kits and dedicate one each to being hand-wound and motor-driven.  Either way, I think the Twister will be more fun to play with than kit 31 was.

The last comment I have is with the manga at the end of the mook.  This time, it’s going to be a “Manga Science” reprint by Yoshitou Asari.  You may remember Yoshitou as the interviewer in the “Homo Volant” article from Mook #31.  He’s a manga artist that got his start doing the “Manga Science” series in the 70’s, before going on to draw “Space Family Carlvinson” and “Lucu Lucu”.  He also designed the Angels in Neon Genesis Evangelion.  So, yeah, I’m looking forward to this issue.


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