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AMSOIL Synthetic Grease Helps Customer Achieve Punkin Chunkin World Record

MSOIL SYNTHETIC LUBRICANTS are manufactured for many applications, but customers continue finding new ways to benefit from AMSOIL technology.

Steve Seigars of Greenfield, N.H. certainly fits into that category. Seigars leads the Yankee Siege II team in the annual Punkin Chunkin competition in Bridgeville, Del. The original Yankee Siege "punkin chunker" was retired a couple of years ago. "It's a silly sport," Seigars said, "but it's a lot of fun and raises money for scholarships, children's hospitals and other organizations that benefit youth and the local community." His team consists of a core group of five to six members.

AMSOIL Synthetic Grease Ends Friction Problem
AMSOIL Synthetic Polymeric Off-Road Grease solved an ongoing friction problem in Seigars' trebuchet. "I finally found a grease that prevented scuffing on my sleeve bearings," said Seigars. "We have the world record for throwing a pumpkin with a trebuchet. Last year we tossed a pumpkin 2,836 feet."

Seigars found AMSOIL after taking a tribology course that taught him the importance of using synthetic grease to overcome scuffing of bearings.

The Trebuchet
The trebuchet is a gravity-driven machine. It raises a 25,000-pound counterweight 5 feet in the air as it rotates on a lever with a sling and pouch. Bearings inside the sleeve of the round shaft inside a pipe allow the rotation. When the trigger is pulled, the weight drops and the sling comes to a screeching halt at the end of the bearings. That sudden stop applies about 150,000 pounds of pressure, which pounds the grease out and causes metal-to-metal friction. "You have to have good lubrication at all points so there is not metal-to-metal wear," Seigars said. He had been seeing scuffing of the bearings in his machine after about 10 to 15 cycles, which meant the bearings were wearing quickly

Seigars learned in the tribology course that he needed a synthetic grease with 5 percent moly additive in order to stop the bearing wear. Research online led him to AMSOIL Synthetic Polymeric Off-Road Grease. "The combination was the answer to premature wear," Seigars said.

The Competition
The World Championship Punkin Chunkin Association (WCPCA) is a trademark nonprofit that hosts a signature pumpkin-launching event each year, fueling innovative engineering and science-based ideas that draw spectators from all over. About 105 teams enter the three-day event, typically held the weekend after Halloween.

According to the association's website, "Punkin Chunkin cultivates the odd, challenging and competitive quest for distance that inspires creativity, ingenuity, teamwork and passion." Pumpkins can be launched using compressed air devices, such as cannons; catapults that use ropes and pulleys; and centrifugal-force machines that use a spinning arm to let the pumpkins fly.

Each team gets one shot per day. The longest shot at the end of the event is the winner. Winners earn a trophy and a donation to the charity of their choice. Seigars and the Yankee Siege II team won the trebuchet division last year with their record-setting 2,836-foot launch. The team chose the A.L.S. Family Charitable Foundation in Buzzards Bay, Mass. to receive a donation from the WCPCA.

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