Model mount system for testing flutter

A wind tunnel model mount system is disclosed for effectively and accurately determining the effects of attack and airstream velocity on a model airfoil or aircraft. The model mount system includes a rigid model attached to a splitter plate which is supported away from the wind tunnel wall several of flexible rods. Conventional instrumentation is employed to effect model rotation through a turntable and to record model flutter data as a function of the angle of attack versus dynamic pressure

Cable suspended windmill

A windmill is disclosed which includes an airframe having an upwind end and a downwind end. The first rotor is rotatably connected to the airframe, and a generator is supported by the airframe and driven by the rotor. The airframe is supported vertically in an elevated disposition by poles which extend vertically upwardly from the ground and support cables which extend between the vertical poles. Suspension cables suspend the airframe from the support cable

A two-degree-of-freedom flutter mount system with low damping for testing rigid wings at different angles of attack

A wind tunnel model mount system for conducting flutter research using a rigid wing was developed. The wing is attached to a splitter plate so that the two move as one rigid body. The splitter plate is supported away from the tunnel wall by a system of rods with fixed fixed and conditions. The rods flex in such a way that only pitch and plunge oscillations are permitted. At the tunnel wall the rods are attached to a remotely controlled turntable so that angle of attack can be varied. Wind tunnel data obtained by using the mount system are presented for a supercritical and a conventional airfoil. Both classical flutter and stall flutter data are presented

Costs and cost trends for forestry practices in the South

Cost estimates of practicing forestry in the South during 1986 and cost changes during the 1952-1986 period are presented in this report. Albert C. Worrell reported the original cost study in Forest Farmer in May 1953. His work was updated by James G. Yoho and Robert B. Fish in the November 1961 issue of Forest Farmer. Other revisions include James G. Yoho, George F . Dutrow, and James Moak (Forest Farmer, 1971); James Moak and Jim Kucera (Forest Farmer, 1975); James Moak, James Kucera, and W.F. Watson (Forest Farmer Manual, 1977); James Moak, W.F. Watson, and Paul Van Deusen (Forest Farmer Manual, 1980); James Moak, W.F. Watson, and Mark Watson (Forest Farmer Manual, 1983); and Thomas J. Straka and William F . Watson (Forest Farmer Manual, 1985). The present study is based on the results of a survey completed in 1986 and reports current costs for most forestry practices covered by previous surveys. It also provides tables with cost changes from 1952 to 1986 for\u27 specific commercial practices common in the South

Conjectures for the integral moments and ratios of L-functions over function fields

We extend to the function field setting the heuristic previously developed, by Conrey, Farmer, Keating, Rubinstein and Snaith, for the integral moments and ratios of $L$-functions defined over number fields. Specifically, we give a heuristic for the moments and ratios of a family of $L$-functions associated with hyperelliptic curves of genus $g$ over a fixed finite field $\mathbb{F}_{q}$ in the limit as $g\rightarrow\infty$. Like in the number field case, there is a striking resemblance to the corresponding formulae for the characteristic polynomials of random matrices. As an application, we calculate the one-level density for the zeros of these $L$-functions.Comment: 40 page

MERGERS for Stronger Cooperatives

Mergers for Stronger Cooperatives by JOSEPH G. KNAPP Administrator, Farmer Cooperative Service. Economic Explorations Into Mergers by MARTIN A. ABRAHAMSEN Farmer Cooperative Service. Merging Cooperatives -The Human Equation by IRWIN W. RUST Farmer Cooperative Service. Financial Problems and Procedures in Merger by DAVID VOLKIN Farmer Cooperative Service Steps In Merging Cooperatives by J. WARREN MATHER and STANLEY F. KRAUSE, Farmer Cooperative Service Legal Problems Involved in Mergers by ELMER MOSTOW, JOHN F. DONOGHUE, & RAYMOND J. MISCHLER, Office of the General Counse

Robert G. Scott

An obituary for farmer Robert G. Scott

Calculation of flow about posts and powerhead model

A three dimensional analysis of the non-uniform flow around the liquid oxygen (LOX) posts in the Space Shuttle Main Engine (SSME) powerhead was performed to determine possible factors contributing to the failure of the posts. Also performed was three dimensional numerical fluid flow analysis of the high pressure fuel turbopump (HPFTP) exhaust system, consisting of the turnaround duct (TAD), two-duct hot gas manifold (HGM), and the Version B transfer ducts. The analysis was conducted in the following manner: (1) modeling the flow around a single and small clusters (2 to 10) of posts; (2) modeling the velocity field in the cross plane; and (3) modeling the entire flow region with a three dimensional network type model. Shear stress functions which will permit viscous analysis without requiring excessive numbers of computational grid points were developed. These wall functions, laminar and turbulent, have been compared to standard Blasius solutions and are directly applicable to the cylinder in cross flow class of problems to which the LOX post problem belongs

G. W. Williams, S. K. Farmer, and J. E. Massey

G. W. Williams, S. K. Farmer, and J. E. Massey next to Bench Scalehttps://scholarsjunction.msstate.edu/ua-photo-collection/7825/thumbnail.jp

Some results from the Farmer Consumer Partnership project

Presentation on the results of the Core Farmer Consumer Partnership project given at the OF&G conference on "selling organic