Sandy's helicopter resembles a modern helicopter except it is made of various items found on the island that Sandy and the others were stranded on. One of the materials used is bamboo.
Sandy reveals in "The Krabby Patty That Ate Bikini Bottom" that the helicopter runs on coconut milk.
Role in series
Sandy tells SpongeBob that he can't come to the Moon with her, especially after his "little mishap" with Sandy's "whirly-bird" (another term for "helicopter"); the scene zooms into a massive amount of gravestones in Sandy's yard, hinting that SpongeBob may have caused several accidental deaths when operating the helicopter in the past.
"SpongeBob SquarePants vs. The Big One"
Sandy, after deciding to use the variety of resources of the island to hear advantage, creates her helicopter in an attempt to fly herself, SpongeBob, and the others back to Bikini Bottom. However, she soon flies into a storm and Mr. Krabs' cash register, Cashy, crashes through her windshield and she starts to lose control.
Sandy is briefly shown flying in her helicopter until Squidward plays his clarinet off-key very loudly which causes Sandy's helicopter to become destroy. As a result, the helicopter starts falling out of the sky as Sandy shouts "Mayday! Mayday!"
"The Krabby Patty That Ate Bikini Bottom"
After Sandy's treedome is destroyed by the giant Krabby Patty, she takes SpongeBob and Patrick in her helicopter and flies to the giant Krabby Patty, which is still ravaging Bikini Bottom. She sets down SpongeBob so that he can absorb the giant patty and save Bikini Bottom.