In today’s Bulldog wrapup of the latest technology news:

  • Airbus unveils 3D-printed motorcycle
  • Startup staffers are mentoring in NYC schools
  • Why not all Android phones are equal
  • Tech can’t make airport security perfect

The details:

  • Airbus unit unveils 3D-printed electric motorcycle

What weighs 77 pounds, goes 50 mph (80 kph) and looks like a Swiss cheese on wheels?

An electric motorcycle made from tiny aluminum alloy particles using a 3D printer.

European aeronautics giant Airbus unveiled the ‘Light Rider ‘ in Germany on Friday. Manufactured by its subsidiary APWorks, a specialist in additive layer manufacturing, the motorcycle uses hollow frame parts that contain the cables and pipes.

The frame weighs just 13 pounds, about 30 percent less than conventional e-motorbikes.

APWorks chief executive Joachim Zettler said the complex, branched hollow structure wouldn’t have been possible with conventional production technologies such as milling or welding.

The company is taking orders for a limited run of 50 motorbikes, costing 50,000 euros ($56,095), plus tax, each.

They’ll have a range of 37 miles (60 kilometers).

  • NYC mentorship program puts startup staffers in schools

The budding entrepreneurs wore glasses made of wooden tongue depressors to pitch their idea for glasses with a chip that lets you find them from your phone.

“And they’ll have windshield wipers, so when they’re dirty or get water on them, you can wipe it up,” said Azariah Drungo, a fifth-grader at Public School 307 in Brooklyn.

Azariah and her classmates spent the past week developing product ideas and as part of a mentorship program that sends engineers and designers from New York City’s burgeoning tech industry into high-poverty public schools. Backers hope the program, which is expanding to other cities, will inspire kids to consider high-tech careers and can eventually help boost diversity at companies like Google and Facebook.

“As an African-American in the tech industry it can be a very, very small community,” said Landon Fears, a software engineer at Brooklyn-based Flocabulary and one of the mentors taking part in the program, called Big Idea Week.

The mentors, from companies including Etsy and the 3D printer manufacturer Makerbot, coached the kids as they broke up into teams of four or five to come up with a product and a PowerPoint presentation to sell it.

The program, which concluded Friday with students pitching their ideas like contestants on a grade-school “Shark Tank,” was the brainchild of Alex Rappaport, the co-founder of Flocabulary, which makes educational hip-hop videos.

  • Why your phone may never get Android’s latest features

Better graphics and the ability to run two apps side by side are coming to Google’s latest version of Android, dubbed N.

But chances are good that this free software update announced Wednesday won’t arrive on your Android phone for some time — if ever. (If you’re an iPhone user, rest easy; none of this affects you.)

So far, just 7.5 percent of active Android users have last year’s version of Android, called Marshmallow. About a quarter are still on versions from 2012 or earlier.

For that, people can thank smartphone makers or their wireless carrier — and maybe both. Last week, two federal agencies asked them to explain why they’re so slow to update Android, as delays mean consumers aren’t getting the latest security improvements.

They also deprive most Android users of the latest technologies. Marshmallow, for instance, introduced fingerprint sign-ons and other features, but so few people have it that some app makers haven’t bothered to incorporate them. Citibank and Capital One, for instance, now let iPhone users sign into their apps with a touch of their finger; neither bank has brought that to Android yet.

  • Experts say perfect security is elusive at all airports

Explosives in the form of paper, or concealed in a medicine-sized bottle and looking like salt. Tiny electric detonators. Security agents at the main airport in Paris are trained to detect all manner of increasingly sophisticated devices that could doom a flight.

But the chilling reality is that security is ultimately fallible.

“The infinitely perfect does not exist,” said Sylvain Prevost, who trains airport personnel seeking the coveted red badge that allows them access to the airport’s restricted areas.

That is especially true when 85,000 people at Charles de Gaulle airport hold red badges, which are good for three years, and many of them work for a host of private companies. Add to the mix, concern over religious extremism in an age of increasing radicalization that can transform people within months.

Airport authorities in France and elsewhere are painfully aware of the risks, but hesitant to speculate as to whether an airport security lapse could have contributed to Thursday’s crash of EgyptAir Flight 804. The Airbus A320 took off from Charles de Gaulle with 66 people on board before lurching wildly to the left and right, spinning around and crashing into the eastern Mediterranean Sea, according to officials.

The cause of the crash remains unclear.

France has been in a state of emergency since Nov. 13 Paris attacks that killed 130, after two deadly attacks earlier in 2015, all with links to the Islamic State group. Security is being further reinforced ahead of the French Open tennis tournament, which starts Sunday, and the Euro 2016 soccer championships, a monthlong tournament that begins June 10.

The March 22 attacks that killed 32 people in Brussels, at the airport and in a metro station, add to the sense that public places like airports are vulnerable.

“It’s possible to get any kind of dangerous object through every airport in the world due to the contradiction between time and security,” said noted criminologist Alain Bauer. “Everybody wants to get in the plane fast …. so everybody compromises on time andsecurity.”