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Janett, Leslie G. (ed.) / The Wisconsin engineer
Volume 39, Number 2 (November, 1934)

Engineering review,   pp. 35-III


Page 36


In the competition for the best student written article, the
article written by John Brennan for the May, 1934, issue
received second place, an article in the Tech Engineering
News of Massachusetts Institute of Technology receiving
first place.
  Delegates of the Wisconsin Engineer who attended the
convention were L. G. Janett, W. H. Tock, and G. H.
Cook. During the course of the sessions, four new magazines
were admitted to membership after satisfactorily passing
through a probationary period. The new magazines are:
The Villanova Engineer, the Washington State Engineer,
the Arkansas Engineer, and the N. Y. U. Quadrangle. To
these magazines the Wisconsin Engineer extends a hearty
welcome and best wishes.
          A Motor with a Personal Touch
  On certain mornings during the summer months a round-
bottomed clumsy boat was heard and seen puttering across
Lake Monona. Engineers of the Shop 7 class would have
recognized the familiar noise. The staff in this course de-
veloped the one cylinder, two cycle, three-quarter horse-
power gas engine, which every junior engineer has a chance
to construct, into a neat inboard motor. Mr. Puddester was
especially interested in this experiment. The motor with a
two and one-half inch bore, a two inch stroke, and a rotary
valve, when tested on the rack showed 2250 rpm, and in
         Columbium -
   A New Alloy Metal in Stainless Steels
   The stainless steel of great importance today is an open
field for further experimentation to improve its already
adaptable qualities.  Known as alloy 18-8 because of its
approximate composition of 18% chromium and 8% nickel,
in addition to iron and carbon, the addition of a new
element, columbium, has resulted in a better stabilized
product.
Page 36
a brake test registered 1500 rpm at 34 bhp. A shaft ex-
tended from the crankshaft, actuated a two blade, six inch
propellor. On the average, inboard motors weigh from 27
to 133 pounds. This particular type weighed 38 pounds.
An interesting feature was the deflection baffle located on
the head of the piston. Since the motor was of the two
cycle type, such an arrangement was necessary in order
that the incoming fuel was not lost in the escaping exhaust.
It is claimed that the engine can be easily adjusted for driv-
ing lawn mowers, cream separators, and small water pumps.
Incidentally, every part of the motor was made in the Uni-
versity of Wisconsin shops.
  Dr. John A. Mathews, in his recent second edition of
The Book of Stainless Steels has found from his research
that a ratio of columbium to carbon of ten to one produced
a steel that did not disintegrate or show grain boundary
attack when treated by a copper sulfate solution in sul-
phuric acid at from 600 to 15000 F. He also showed that
a ratio of only four to one resulted in an alloy that was
not appreciably attacked after treated with boiling copper
sulphate for 220 hours. The use of 18-8 where corrosive
conditions are extant is especially adaptable for fractionat-
ing columns of the type shown in the illustration.
Welding 3Y8-inch Plates of 18-8 Stainless Steel in Construction of a Twenty
Ton Fractionating Tower.
       The Wisconsin Engineer
PANTORIUM CO.
               Madison's
          Master Cleaners
           Telephone Badger 1180
558 State St.                    2136/2 Regent St.
909 University Ave.               2616 Monroe St.


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