Some cool machining turbine wheel images:
Image from page 205 of “Machine design” (1906)
Image by Internet Archive Book Pictures
Identifier: machinedesign02benj
Title: Machine design
Year: 1906 (1900s)
Authors: Benjamin, Charles H[enry], 1856- [from old catalog]
Subjects: Machine style
Publisher: New York, H. Holt and business
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress
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About This Book: Catalog Entry
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Text Appearing Ahead of Image:
avert the tendency of the bendingto open the joints, and the fastenings need to have thesame tensile strength as the rim of the wheel. 86. Rotating Discs. The formulas derived in Art.82 will only apply in the case of thin rims and cannotbe used for discs or for rims obtaining any considerabledepth. The determination of the stresses in a rotatingdisc is a complicated and hard problem, if the ma-terial is regarded as completely elastic. A rational resolution of this difficulty might be discovered inStodolas Steam Turbines, pp. 157-69. For the pur- 12 178 MACHINE Design. poses of this treatise an approximate solution is pre-ferred, the elasticity of the metal being neglected.This approach of treatment is much easier, and as themetals employed are imperfectly elastic (especially the castmetals) the benefits obtained will possibly be as reliableas any—for sensible use. The following discussion is an abstract of 1 givenby Mr. A. M. Levin in the American Machinist * thenotation getting changed somewhat.
Text Appearing Right after Image:
Fig. 80. 87. Plain Discs. Let Fig. 80 representa ring of uniformthickness t, havingan external diameterD and an internaldiameter d, all ininches. Let v=external ve-locity in feet per sec-ond. Let a. angular velocity =-77- r=radius to center of gravity of half ring in feet.w=weight of metal per cubic inch.The worth of r for a half-ring is simply proved to be : _2_ Dz-d* 3tt or £>2- 1 18tt d2D3 in inches D2-d % in feet. * American Machinist, Oct. 20, 1904, ROTATING DISCS. 179 The weight of the half-ring is : W=l(D2-cl2)tw o and its centrifugal force : n Wa2r aHw^—d?) ,QQs c=~r= isr~ m Substituting for a its value in terms of v : c_UwvJJ-dz) /g9x Now if we assume the tension on the area at AB dueto the centrifugal force to be uniformly distributed :(and right here lies the approximation) then will the tensilestress on the section be e C ±wvD2 + Dd+d2) ,lnAv S=(D=Wt= gU * (1°0) For a solid disc : s^Jf- (101) For a thin ring : S^J^f (102) on the identical as in equation (89). If the metal be
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Tucumcari, New Mexico – The Blue Swallow Motel
Image by Boogies with Fish
www.messersmith.name/wordpress/2012/08/13/tucumcari-new-m…
I managed to skip posting for the complete month of July. Some could have fretted more than my passing, but I’ve merely been in also fine a mood to complain about anything. July discovered Gracie and I to be wandering Gypsies. A function trip to Dallas was followed in a week by Waterloo, Illinois to pay a visit to kids and to report to supporters about my new function as a Media Arts Specialist for Pioneer Bible Translators.
Each voyages have been long road trips. We bought a couple of books from Audible.com to ease the road tedium. Conversations take you only so far. A Canticle for Leibowitz by Walter M. Miller, Jr. was an outstanding listen. I read it many years ago. We followed that with The Man Who Mistook His Wife for a Hat by neurologist Oliver Sacks. This audo book needed a bit more attention, so I had to concentrate on my driving. Grace got a great deal from it, considering that it was proper up her alley.
I could not talk about our road trips to Dallas with no mentioning Tucumcari, New Mexico and specifically the Blue Swallow Motel. Tucumcari, whose residents number only about 5 thousand, is what I would get in touch with a "wide spot in the road." Its existence appears mainly attributed to attention to the comfort of travelers. There possibly would not be a Tucumcari were it not for the railroad. Here is how Tucumcari came to be, according to Wikipedia:
In 1901, the Chicago, Rock Island and Pacific Railroad constructed a building camp in the western portion of modern-day Quay County. Owing to many gunfights, the camp became identified as Six Shooter Siding. Soon after it grew into a permanent settlement, it was renamed Tucumcari in 1908. The name was taken from Tucumcari Mountain, which is situated close to the community.
Yes, the railroad was the well-known Rock Island Line of folk music fame. Whilst I am on the topic, have a listen to a recording of the song by a group from the Italian rockabilly scene, Wheels Fargo and the Nightengale.
But, I digress. Getting back to Tucumcari, a long road trip and where to lay your head, brings up the subject of The Blue Swallow Motel. This goes on my list of amusing funky areas to sleep. Built in 1939 when the idea of "motor hotel" meant that you had to have your personal personal garage for the family buggy (more later), it has probably fallen on hard occasions much more than when, but has not too long ago been revived but not unduly modified by good owners Nancy and Kevin to keep the flavor of the place with no excessively destroying the patina of ageless Route 66 cool.
I cannot imagine any greater way to express my tribute to The Blue Swallow Motel than this shot, of which I am rather proud, of the grand automobile entryway accomplished in the style of the Photorealists. Yeah, I know it really is not a painting. I am not that talented. I’m just a copycat.
If you are ever in Tucumcari and looking for culture you need to contemplate The Blue Swallow. Frankly, it is not a place you might want to stay for a week if you are accompanied by a lady who requires her beauty shop science seriously. Gracie was certainly amused by the ambiance, but complained that the bathroom had little in the way of "chick space." This is not your star spangled Hilton. It is, nonetheless, immaculately clean and charmingly adorned with furnishings of the period. What it lacks in accoutrements is far more than produced up for by American Road Trip style.
As are numerous structures in Tucumcari, The Blue Swallow’s flat spaces are splashed with folksy Americana.
Everywhere you look are scenes familiar to any individual over the age of sixty. The place appeals to the jaded road warrior.
If your vehicle is not a lot bigger than that of a pre-war chariot you can make use of your individual carriage house, the walls of which are illustrated with far more adorable American kitsch.
If you are ever in Tucumcari, at least have a appear at the Blue Swallow Motel. I imagine that there is nothing else like it left.
Well, except for the Petrified Wood Station in Decatur, Texas. It dates from the same general era, having received its raggedy coat of rather poor top quality petrified wood in 1935. It doesn’t sell gas any a lot more. The owner makes use of it as his private office.
On our way to Phoenix although the Gladiator Fire was at its peak I got this shot.
We have been a long way from the Highway, so I needed all 300mm of lens. The air was quite smoky. I had to massage the shot severely with some good oily Photoshop.
I love wind machines. Components of the Southwest are littered with them. We see hundreds on our trips from Sedona to Dallas. You can tell when you happen to be acquiring close to a massive wind farm because the trees are permanently bent in 1 direction – the prevailing wind. In this shot, the wind was blowing strongly. It amused me that these two wind turbines had been turning in practically precise synchronization.
And now a image of a squirrel, for no purpose whatsoever.
We have one precisely like this living in our big walnut tree beside the garage. I have not managed to get a shot of her but, so this will have to do. This squirrel lives at Montezuma’s Castle, which I hope to cover in a future post. Our squirrel is madly collecting walnuts and burying them in the most unlikely places.
Also, just simply because I can, I will show you Datura or Angel’s Trumpet, a psychotropic plant that will place you into health-related care if you try to get high by eating it. It really is a member of the family Solanaceae, numerous species of which are toxic and some of which are tasty, which includes tomatoes, peppers, potatoes and eggplant.
I suppose it is called the Angel’s Trumpet since that is what you may hear if you eat it.
While we’re at it we might as well see a Home Finch (a handful of of which I hear tweeting now through the open patio door) sitting on a nonetheless folded blossom of a Saguaro cactus.
The Residence Finch (Haemorhous mexicanus) is by far the most typical bird about our feeder. What they lack in spectacular colors they make up for in numbers.
Lastly, a bee feeding frenzy. When the Prickly Pear cacti are blooming the bees get busy.
I count three inside the blossom and one waiting impatiently to dive in.