you know the name Jacuzzi, because of the hot tub. But the Jacuzzi brothers went into business first by making airplane propellers in Berkeley California, after WW1 they designed their own airplanes, including the Jacuzzi J-7

This propeller was manufactured by the Jacuzzi brothers around 1918.

 It was designed for use on aircraft powered by Liberty V-12 aircraft engines, primarily American-built DH-4s. 

The Jacuzzi brothers, Giocondo (1895–1921), Frank (1889–1973), Rachele (1886–1937), Candido (1903–86), Joseph (1891–1965), Gelindo (1894–1950), and Valeriano (1887–1973) originally opened a machining company in Berkeley, California, in 1915. 

After seeing propellers on aircraft flying at the 1915 Panama-Pacific International Exposition in San Francisco, Rachele was inspired to design a better one. 

Impressed by his new aerodynamic propeller design, the US government awarded the Jacuzzi brothers a contract to manufacture their propellers for World War I military aircraft. After the war, the brothers expanded their aviation business and even designed their own airplanes, including the Jacuzzi J-7.

 In 1921, they left the aviation industry and decades later, their company produced whirlpool hot tubs for which their name is most recognized today.

https://www.facebook.com/SFOMuseum/posts/this-propeller-was-manufactured-by-the-jacuzzi-brothers-around-1918-it-was-desig/1319800086823584/

interested in identifying historic wooden aircraft propellers?

 https://hartzellprop.com/identify-historic-aircraft-propellers/

mechanical eye candy

 https://airwaysmag.com/the-unducted-fan-engine/

“Going the Distance: Endurance Aircraft Engines and Propellers of the 1910s and 20s” exhibition will open at the San Francisco airport’s Aviation Museum, for free, pre security

The exhibition focuses on aircraft engines and propellers from the early twentieth century when powered flight was still in its infancy. At the time there were three different types of engines in use – the radial, the in-line, and the V-type.

The exhibition is located pre-security in the Aviation Museum and Library at the SFO Museum, San Francisco International Airport. Entry is free of charge, and the exhibition will run from June 1st, 2022 to November 13th, 2023, from 10.00 am to 4.30 pm daily.

The SFO Museum opened in 1980, and was accredited by the American Association of Museums in 1999. The museum is currently the only accredited museum to be located inside an Airport.

https://simpleflying.com/how-san-francisco-is-paying-tribute-to-early-aircraft-engines-propellers/

https://www.sfomuseum.org/exhibitions/going-the-distance

 The two engines presented in this exhibition are from the collection of a retired World Airways captain, Fred Patterson, he has been collecting, recovering, and restoring historic aircraft, engines, propellers, and other aviation components for over forty years.

 A recognized expert in “golden age of flight” airplanes of the 1920s and 30s, he has served as a technical advisor and completed numerous restoration projects of vintage aircraft to airworthy status. Vintage airplanes and engines from his collection are exhibited in museums across the country. 

This Westinghouse Micarta propeller is from the Monte Chase Propeller Collection.

Aviation has continuously featured in Monte Chase’s life. His family was actively involved in aviation and was a fixed-base operator with worldwide sales for nearly fifty years. 

He acquired his first propeller when he was seventeen, a gift from his uncle when he received his private pilot’s license. Over the course of his life, he has become a dedicated expert and collector of wooden ground adjustable and controllable pitch propellers.  https://www.notplanejane.com/

propellers, used to make bars, dens, and livingrooms look better since WW1.

The metal variable pitch prop has a cool history:

This particular propeller was from a Lockheed Vega airplane owned by the Crosley Radio Corporation and flown by Ruth Nichols.
Flying in that airplane in 1931-32, Nichols became the only woman to hold simultaneously the women's international speed, altitude, and distance records for flight. She set the distance record in October 1931 when she flew 1,977 miles between Oakland, California and Louisville, Kentucky. Nichols' records proved the effectiveness of the new controllable-pitch propeller.

Just above that, the dark wooden very old prop;

This propeller is from a Curtiss Model D pusher biplane flown by Eugene B. Ely on January 18, 1911 for the first landing on a ship, the battleship USS Pennsylvania in San Francisco Bay, using the first ever tailhook system.

https://airandspace.si.edu/collections/propulsion?page=2
https://www.westlandlondon.com/antiques/decorativeitems/other/
https://riseofflight.com/forum/topic/31992-wooden-ww1-aircraft-propellers/
https://www.historicpropellers.com/woodenpropeller-ebora

Found after 60 years in the workshop of a mechanic, a De Dion Bouton bike with a Motobecane engine and 20" Wooden Propeller

https://www.facebook.com/groups/1486432604727058/permalink/1815094171860898/

it has skis and a big damn engine...

Found on http://pedalfar.tumblr.com via http://bassman5911.tumblr.com/

The 3 seater- propeller driven- 1913 Thor pacer bicycle mated to a Henderson motorcycle engine with a propeller

Strange arrangement of controls... why the rider in the back gets to adjust the speed, but can't see if the bike and riders are likely to run into anything... that doesn't seem like the best idea.

Click on the above for a big full screen version

Look close at the chain, it's the only one I've seen like it. I wonder why they thought this double roller type would be better than a single link and roller

Did you know there was a race to the South Pole in a Biodiesel powered vehicel?

http://www.pirate4x4.com/forum/showthread.php?t=929487&page=3

Wide variety of odd vehicles on a forum at Volksrods.com

The below blue bug is Digital art by Iris Antonio

via: http://www.volksrods.com/forum/showthread.php?t=3873