SPRING 2008 NEWS
Milburn achieves Board Certified Status with the Institute of Noise Control Engineering (INCE).
In March Darrell Milburn was accepted as a board certified member of I.N.C.E. With this status he joins our two other Board Certified Engineers, Joe Smullin and Fred Kern, of the institute who have proved to their colleagues their span of knowledge and experience in their field. This honor, of course, is secondary to satisfaction these and our other engineers achieve for our clients on a daily basis. We congratulate Darrell and wish him much further success.
New Staff Additions
Over the course of 2007 J&A Enterprises was fortunate to gain two new staff Engineers having graduate level degrees in their specialty.
Molly Ziergiebel joined us in April 2007. She has an Masters in Structural Engineering and Geomechanics from Stanford University in the area of structural dynamics. Her specialty at J&A is analyzing dynamics of ship structures and foundations, using Finite Element Analysis (FEA), machinery vibration isolation. She also has oversight coordination for several yacht “new build” projects.
Kaolin Kinsey joined us in September 2007 with a brand new Masters in Acoustics from Pennsylvania State University. Kaolin backs up his knowledge of acoustics with deep experience in mechanical devices and assembly. He conducts noise and vibration testing for clients and our own in-house research projects. Kaolin has been approved by the EU notifying body, TUV, to conduct Annex VI sound power testing on particular machinery for European CE certification.
Kaolin has developed our insulation drafting department in an organized and streamlined fashion, to suite the needs of our clients and their evermore sophisticated projects.
We wish our new hires the best success and expect that our clients will be delighted to work with them.
- 2003 Large Aluminum MCA Yachts
the period June 2002 through Mar 2003, J&A has participated
in the delivery of three large (over 50 m ) aluminum yachts built
to the demanding classification rules for Large Yachts, under MCA.
The yachts: Anson Bell (Palmer Johnson), Aussie Rules (Oceanfast),
and FELICITA West (Perini) are among the first aluminum boats constructed
in strict compliance with the MCA rules for large yachts. All three
boats are constructed to very demanding specifications regarding
noise and vibration, and the finished product is superb, resulting
in very satisfied owners.
has designed innovative, fire rated insulation systems, meeting
the latest MCA requirements calling for "steel equivalent"
or greater protection of structural elements. Our ground breaking
design has been executed while, at the same time, maintaining the
high degree of excellence of noise and vibration requirements for
which we are noted.
responsibilities went beyond insulation design, and included machinery
mounting, HVAC, exhaust, and propeller design review.
first large aluminum boats built to MCA, set some of the current
ground rules within the evolving MCA rule interpretation, and J&A
is prepared to do follow-on when aluminum is the preferred material
for large yachts, in sail or power.
Speed Current Projects
are the noise control consultants for the design and construction
of the first large Catamaran Ferry (73m) constructed in the U.S.A.
The vessel in fabrication at Dereckter Shipyard, Bridgeport, CT
must perform to specified noise standards within a very restricted
weight budget. J&A modeling of noise transmission in the hull
and of structural dynamics of machinery mountings and of global
structural elements is helping to achieve the design requirements
in a cost efficient and weight effective fashion.
engineering has verified methods of weight savings which will allow
the noise and vibration requirements to be met, with great benefit
to the program objectives.
Yacht Report, April 2003, Issue 52
To read The Yacht Report's interview with the owner of Aussie Rules
and get Greg Norman's views concerning the developments in the marine
industry in general and Aussie Rules in particular, please click
Mr. Norman states, "I can happily and proudly say that Aussie
Rules is the quietest and smoothest yacht that I have ever cruised
on and I have chartered and owned several yachts including some
of those from the reputed best yacht builders. When anchored in
various atolls in the Pacific she sat perfectly in the water, in
both heavy and light ship conditions. Her stability is incredible
and when sitting in my cabin with the engines at almost full load
she is dead quiet. So all in all, I am very pleased with the end
2002, International Exhibition & Congress Centre, Amsterdam,
FAI in conjunction with METS 2002, hosted by The Yacht Report, November
18th - 20th, 2002. To read Joe Smullin's paper presented to the
international yachting audience entitled, "Noise
and Vibration Specifications for Large Yachts", please
The papers as posted or printed are private property and may not be copied in part or in whole without direct written consent from Joe Smullin.