Sea life defended the republic

Jennifer Pocock — Tue, 29 Apr 2025 15:34:12 +0000

Sea life defended the republic Jennifer Pocock Tue, 04/29/2025 - 11:34

In This Story

The bioinspired blimps performed swimmingly.

Blimp Squad members Elijah Pointer and Kareem Zaharan (seniors in mechanical engineering) reach for a balloon captured in Narly's net as Faculty Adviser Daigo Shishika looks on. Photo by Jenn Pocock

Narly glided toward the ceiling of George Mason Ģ��AV's Life Science and Engineering Building aviary like a shiny beluga whale with undulating manta-ray wings and a rudder tail. Thomas Girois, a senior in mechanical engineering and Narly’s team lead, flipped on the blimp’s autonomous goal-seeking program to show off its ability to target airborne objects. He hopes it will head toward the balloon that he wants to capture. But it made an unexpected turn and instead nosed the high bay windows, where it wouldn’t move despite its programmed back-up function.

After a moment of confusion, Girois laughed. “It’s outsmarted us again!”

Narly’s microcontroller and camera was coded to recognize and hunt down green and purple airborne objects—which is exactly what it did when it registered the glowing green Exit sign on the ceiling outside the window. Still, the test boded well for the upcoming competition.

Narly was one of three sea life–inspired Lighter Than Air (LTA) vehicles to compete on George Mason’s Blimp Squad in the Defend the Republic (DTR) contest from April 21 – 25, 2025.

The Blimp Squad lines up with their devices, ready to go on the offense. Photo by Jenn Pocock

Flappy, another manta ray blimp, has a larger rudder tail that allows it to make pinpoint midair turns, and Knifey, inspired by the knifefish, has a long, undulating frill along its belly—and a fierce expression. These designs differ from their competitors’, which rely on propellers for propulsion and steering.

“Using propellers is easier,” said Daigo Shishika, assistant professor in the Department of Mechanical Engineering and one of the Blimp Squad’s faculty advisers. “But the big surface areas of our flapping wings are more efficient. Propeller-driven blimps need to carry more batteries, which are heavy and drain fast.”

Shishika noted that contestants lose points if they hurt another team’s blimp, which is always a risk with propellers.

Alexia De Costa (sophomore, computer science) follows under the fearsome Knifey, whose underbelly frill was inspired by the knifefish. Photo by Jenn Pocock

“We’re hoping to get more agility and a safer blimp,” he said.

Ningshi Yao, an assistant professor in the Department of Electrical and Computer Engineering and the squad’s other faculty adviser, also pointed out the blimps’ winning personalities. “Our flappies are pretty attractive robots,” she said. “Human-robot interaction is important. You want humans to like being around it!”

One DTR spectator, upon seeing Flappy fly for the first time, confirmed this theory. “It’s so cute!” she gasped. “I would die for Flappy.”

After hundreds of hours of testing, Narly, Flappy, and Knifey joined their two defense blimps—a zippy acrobatic wonder called Space Fish, and a high-scoring high-flier called Backbone Junior—to play a midair game of capturing balloons and releasing them through hoops to score goals.

Knifey's fierce expression intimidates the competition. Photo by:Jenn Pocock.

The team took third place out of six and scored the second-most points of all the teams.

“One highlight for me personally was that the flapping wing blimp achieved fully autonomous scoring for the first time since its first debut in the spring of 2023,” said Shishika. “It started as an exploratory agent that was primarily for research, but after two years and four competitions, Flappy finally contributed to the team by scoring 70 points.”

Narly also scored its first autonomous points.

While the team may not have taken first place, their sea-inspired research won the week.

Check out these shorts on our Youtube channel to see the vehicles and their designers in action.

Ģ��AVics

lighter-than-air robotics

robotics and autonomous systems

competitions

mechanical engineering

Applied computer science

Electrical and Computer Engineering

Students