Fullsize image: https://diqn32j8nouaz.cloudfront.net...s_fullsize.jpgKay McNulty, Alyse Snyder, and Sis Stump operate the differential analyzer in the basement of the Moore School of Electrical Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, circa 1942-1945.
More: https://en.wikipedia.org/wiki/Differential_analyser
New plans added on 11/22: Click here for 2,593 plans for homemade tools.
baja (Sep 12, 2020), Toolmaker51 (Sep 11, 2020), volodar (Sep 11, 2020)
C&EI Railroad work crew. Villa Grove, IL. 1925.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...w_fullsize.jpg
New plans added on 11/22: Click here for 2,593 plans for homemade tools.
baja (Sep 15, 2020), clydeman (Sep 14, 2020), jimfols (Sep 13, 2020), marksbug (Sep 13, 2020), Toolmaker51 (Sep 13, 2020)
crap, no wonder why my shipment is late!! they are all just standing around!!!! I need that shipment of round tuits now!!!! I cant do any thing else till it get that shipment!!!
You need your round tuits and they are posing at the round house, they could head off in any direction.
Ralph
marksbug (Sep 17, 2020)
You can use this one that I've had for over 40 years...
marksbug (Sep 17, 2020)
I need a lot more than just that one, and thats pretty thin I dont know if it will hold up, especially with the hurricane that just went through...real effing slow.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...w_fullsize.jpgKaplan-type turbine runner before installation. Photo by U.S. Army Corps of Engineers.
New plans added on 11/22: Click here for 2,593 plans for homemade tools.
jimfols (Sep 20, 2020), marksbug (Sep 20, 2020), nova_robotics (Sep 21, 2020), Toolmaker51 (Sep 20, 2020)
sweet , variable pitch!! we used to run some boat props like that.
looks like a long way to fall - such a cool pic wouldn't be allowed today . . .
I assume this is a turbine for a hydro-electric plant.
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