The 21 A-3 was designed as Sweden's front line fighter before and during WW2. It was an unconventional twin boom rear engine layout and featured an injection seat to allow the pilot to bail out safely. The plane never was developed properly and after the war was considered for conversion to jet power. Three remain in Swedish museums.
Made by the Pioneer company of Boise Idaho with one set of teeth for bone, one for wood, it would be handy tool for a hunter in the woods. Although these are common on ebay and elsewhere, there does not seem to be a lot of information online about the company.
Above, the first Greeves prototype of 1951 featuring rubber suspension front and rear, and below 2 years later, the beginning of production. The front suspension is all tidied up, still using rubber in torsion but the rear has reverted to shock absorbers. The whole appearance is much nicer too.
At Aviation Day in July 1961 the Soviet Union demonstrated the Mil Mi-10, the world's largest helicopter, able to carry loads of 33000 lbs. The aircraft was produced till 1969 and is still in use today
We don't use nails near as much since deck and drywall screws became popular but the graphic is nice, maybe it would look good on a T shirt. As a side note, although you get more 6d nails in a pound than with 10d nails, go with bigger ones when building a tree fort. It's lesson I learned as a kid, spending my meagre allowance for supplies at the hardware store...
Magnalite was the brand name of a line of cast aluminum/magnesium alloy cookware designed and produced by Wagnerware of Sidney Ohio. It was introduced in 1934 and apparently continues to be sold even today, despite the aluminum/Alzheimer's scare of about 40 years ago. In 1979, a version of the cookware (Magpro) was developed featuring a hard anodized finish.
Rider Orlando Ghiro emulating Rollie Free, at speed on his streamlined Ceccato during speed record attempts in 1955. They achieved a speed of 134.7 kph (83.7 mph) over the flying mile with an OHC 75cc engine designed with the help of Fabio Taglioni- later of Ducati engine fame.
Pictures of this old International were sent in by a viewer, taken at the Firefighter Museum in Port Hope, Ontario a few years ago. I read recently that sadly, the museum was closed, due to uranium soil remediation on their site.
March 26 1949 was a sad day for streetcar fans, they were replaced by electric trolley buses which ran till 1970 when they too were retired, replaced by diesel buses. At the height of WW2, the streetcar lines in Halifax had a ridership of about 32 million per year.
Here's one of the first attempts at motorcycle rear suspension. The "swinging arm" pivots around the end of the frame stays, the front loop has a sliding block that moves around the curved frame tube with springs above and below to control wheel movement. Elliston and Fell introduced this rear suspension in 1910 on the P V (Perry Vale, named for the location in London of the factory). Later versions moved the springs inside a slotted larger diameter tube for a cleaner appearance. The company was gone by 1925.