Spare Cadillac engines found second life after Stuart tanks

The Cadillac engine once used for the Stuart tank was repurposed for the LVT-3 Bushmaster amphibious assault vehicle. (Flying Heritage Museum photo)

The Cadillac engine once used for the Stuart tank was repurposed for the LVT-3 Bushmaster amphibious assault vehicle. (Flying Heritage Museum photo)

The line hardly ever stopped at the Cadillac engine factory during wartime. Hundreds of new, big V8 engines were crated up each week for use in Stuart tanks. The same goes for General Motors and their never-ending line of newly-created Hydra-Matic transmissions. Two pairs of the powerplants and gearboxes went into each M5 Stuart.

However, as the war moved into its final years, it became clear that the Stuart was obsolete (compared to the Sherman, Chaffee, and others). Now what to do with all that perfectly good horsepower made for a now-defunct tank?

The switch was made easy when the LVT-3 Bushmaster amphibious assault vehicle design got up and running. Each LVT has a set of Stuart engines and transmissions installed, one pair in each sponson on either side of the cargo bay. In the water, the transmission only had first and second gear. On land, the LVT-3 had four speeds (and reverse) and could move at up to 17 miles-per-hour.

Cory Graff is the military aviation curator at Flying Heritage Museum.

Talk to us

> Give us your news tips.

> Send us a letter to the editor.

> More Herald contact information.

More in Life

Whidbey duo uses fencing to teach self-discipline, sportsmanship to youth

Bob Tearse and Joseph Kleinman are sharing their sword-fighting expertise with young people on south Whidbey Island.

Lily Gladstone poses at the premiere of the Hulu miniseries "Under the Bridge" at the DGA Theatre, Monday, April 15, 2024, in Los Angeles. (AP Photo/Chris Pizzello)
Mountlake Terrace’s Lily Gladstone plays cop in Hulu’s ‘Under the Bridge’

The true-crime drama started streaming Wednesday. It’s Gladstone’s first part since her star turn in “Killers of the Flower Moon.”

A giant Bigfoot creation made by Terry Carrigan, 60, at his home-based Skywater Studios on Sunday, April 14, 2024 in Monroe, Washington. (Annie Barker / The Herald)
The 1,500-pound Sasquatch: Bigfoot comes to life in woods near Monroe

A possibly larger-than-life sculpture, created by Terry Carrigan of Skywater Studios, will be featured at this weekend’s “Oddmall” expo.

Craig Chambers takes orders while working behind the bar at Obsidian Beer Hall on Friday, April 12, 2024, in downtown Everett, Washington. (Ryan Berry / The Herald)
Obsidian Beer Hall takes over former Toggle’s space in downtown Everett

Beyond beer, the Black-owned taphouse boasts a chill vibe with plush sofas, art on the walls and hip-hop on the speakers.

Glimpse the ancient past in northeast England

Hadrian’s Wall stretches 73 miles across the isle. It’s still one of England’s most thought-provoking sights.

I accidentally paid twice for my hotel. Can I get a refund?

Why did Valeska Wehr pay twice for her stay at a Marriott property in Boston? And why won’t Booking.com help her?

How do you want your kids to remember you when they grow up?

Childhood flies by, especially for parents. So how should we approach this limited time while our kids are still kids?

Lewis the cat weaves his way through a row of participants during Kitten Yoga at the Everett Animal Shelter on Saturday, April 13, 2024, in Everett, Washington. (Ryan Berry / The Herald)
Downward cat? At kitten yoga in Everett, it’s all paw-sitive vibes

It wasn’t a stretch for furry felines to distract participants. Some cats left with new families — including a reporter.

The Ford Maverick has seating for five passengers. Its cargo bed is 4.5 feet long. (Photo provided by Ford)
2024 Ford Maverick compact pickup undergoes a switch

The previous standard engine is now optional. The previous optional engine is now standard.

Dalton Dover performs during the 2023 CMA Fest on Friday, June 9, 2023, at the Spotify House in Nashville, Tenn. (Photo by Amy Harris/Invision/AP)
Music, theater and more: What’s happening in Snohomish County

The Red Hot Chili Pipers come to Edmonds, and country artist Dalton Dover performs Friday as part of the Everett Stampede.

2024 Genesis G70 Sport Prestige RWD (Photo provided by Genesis)
Genesis Unveils 2024 G70 Sports Prestige Sedan

Combining power, luxury, and innovation, Genesis raises the bar yet again with enhanced performance and cutting-edge features in its latest model.

wisteria flower in Japan
Give your garden a whole new dimension with climbing plants

From clematis and jasmine to wisteria and honeysuckle, let any of these vine varieties creep into your heart – and garden.

Support local journalism

If you value local news, make a gift now to support the trusted journalism you get in The Daily Herald. Donations processed in this system are not tax deductible.