French River Land Company's Home Page! FRL History Hydrolec Disassembly Hydrolec Rebuild Key Personnel Machine Shop News Page Previous Pictures Projects For Sale HYDROELECTRIC SITES: Anasagunticook Lake Dam Replacement- C.Fay & W.Fay Appleton HEP- Jim Lichoulas Badger Pond Dam Removal Senor Bonifettis' sites in Chile Buttermilk Hydro Chittendon Falls Claytor Dam Collins Bascule Dam ESAC WORKS July 1985 Fiske Mill 1852 Fourneyron Golden Pond Hydro Hunts Pond Jaffery Fire Protection Lake May Pelton Wheel Removal Livermore Falls Martinsville Hydro OSV Silk Knitters- Ron Macleod South Village Dam Shaker Mill Dam Tannery Pond Valatie Falls Ware River Power's Hydrostations USEFUL ENGINEERING: The Banki Water Turbine Mockmoore and Merryfield Bishops Method- STABGM Program Blade Design-Nechleba Chain Turbine by: Nguyen Minh Duy Chain Turbine Mechanics- Discussions with Duy Design of Small Water Turbines for Farm and Small Communities Draft Tube Design Draft Tube Tests Ejection into Tailraces of Hydropower Plants: S. M. Slisskii Fall Increaser- Henry Ford Fall Increaser Herschel Venturi Tube Fall Increaser Moody Ejector Turbine Fall Increaser Hydraulic Jump Apron Flashboard Pins Gatecase Design- Kovalev Gatecase Design- Nechleba Hydraulic Turbines by Arnold Pfau Hydrostatic Beam Analysis Impulse Turbines by Ely Hutchinson Kaplan Blade Design NACA Air Foil- Report No. 460 Kaplan Blade Design NACA Air Foil- Report No. 628 Kaplan Design- Kovalev A Laboratory Study to Improve the Efficiency of Crossflow Turbines- N. Aziz & V. Desai Meggering Generators Meggering Earth Resistance Out Gassing Parallel Operation of Turbines Analysis Pelton Design- Daugherty Pelton Design- Nechleba Powerhouse Design- Miniwatt Hydro Powerhouse Design- Natick Dam Power Plant Inspection Rake-Leonard Rake-Newport News Rack Design-Chicopee-Olav Hotvedt Rack Design- PHI- Bill Fay Rack Design-PHI-Brian French Rack Design-PHI-Ken Smith Rack Design-ASCE Rack Design- Hydraulic Institue of Munich Rack Design-Flow Induced Vibrations Selecting Hydraulic Reaction Turbines BUREC Stress Analysis of Hydraulic Turbine Parts, BUREC- F.O. Ruud Some Fluid Flow Characteristics of a Cross Flow Type Hydraulic Turbine- Durgin & Fay Tests on a Kaplan Hydraulic Turbine Theoretical Conditions Related to an Open Channel Flow Linear Turbine- Ishida & Service Turgo, A High Speed Impulse Turbine- Paul Wilson Vortices at Intakes Water Hammer-Lorenzo Allievi-Text Water Hammer-Lorenzo Allievi-Figures Water Hammer-ASME Symposium 1933 Water Hammer _ Norman Gibson Water Hammer-E.B.Strowger Water Wheel Design- Ken Smith Weights Wooden Penstocks TRADE CATALOUGES: Bradway Turbine Brook Waterwheel Charmilles Turbines Dayton Globe Electric Machinery Company (EM) English Pelton ESAC Essex Turbines GE WW Vert Gen GE Springbed Brg Gilkes Turbines GilkesWaterpower Holyoke Hercules Hunt Cat 29 A&B Hunt cylinder Kingsbury Brg Leffel Bulletin 38 Leffel Bulletin 54 Leffel Hoppes Unit Leffel Laboratory Unit Leffel Miscellaneous Lombard Governor Pelton Wheel (1909) Pelton Wheel (1925) Rodney Hunt Samson PamK Smith Power Tables Smith Kaplan Smith Power Smith Pelton Smith Develop Smith Turbines: Bulletin 105 Swain Turbine Tyler Turbine Vertical Shaft Water Wheel Driven Generators- General Electric Wellman Seaver Morgan Westinghouse Small Vertical Waterwheel-Driven A-C Generators, July 1944 Westinghouse WW Generators Woodward Governor Links: Swiftriverhydro.com damengineers.com | | ESSEX TURBINES WEB PAGE The Essex design was similar to the MIT designs by Mohammad Duralli, "Design of Small Water Turbines for Farms and Small Communities" TAP Report 76-1. In this analysis, the complexity of the blade shape is simplified by employing a short aspect ratio between the hub diameter and the throat diameter. This allows short stubby blades to deployed. The short blades approximate a straight airfoil. This eliminates the curvature required on longer blades, to achieve the correct leading edge and trailing edge angles, as a function of radial distance from the hub. 
Ted Larter and John Clements inspecting the new Essex installation at Franklin Falls Hydro circa 1984. Shortly before this day, Brooke Pennypacker and I were driving through and Ted was just lowering the turbine in place. We lent a hand and helped guide the unit on to the penstock flange. This unit gave reasonable performance. When Ted and John replaced the rope drive, cylinder gate machine, inside the mill building, Essex scaled the machine up. The stresses did not scale well and that unit proved to be most vexacious. Chris Krueger's units at Fiske Mill Dam have ongoing problems with blades shearing off at the hubs and temperature build up in the bulbs. 
More of the Franklin Falls installation in Franklin, N.H. 
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