Mercury Marine Jeremy Alby
Mercury Historic RPM data – Jeremy scoured the past to bring a comprehensive list of all Mercury Marine Outboard and Cruiser RPM data necessary for correct propping of boats with these engines. Jeremy reviewed the data and provided slip calculators as a method related solving prop related issues.
Western Branch – Dick Barber
Dick presented The Nuts & Bolts of Shafting – This seminar went into detail of the latest and best methods of attaching both propellers and couplings to shafts. All the variations of Nuts and Keeper Plates, Tapers and Splines, Keys/ Keyways and special treatments. Even some thoughts on cotter pins!
Accu-Tech Propeller – Larry Kindberg
Quick Hits - This seminar presented an array of tips tools and techniques that Larry and his crew at AccuTech Marine Propeller have learned, developed and stolen from other sources over the years.
NMPA Website review
A detailed Presentation on this Website was held– logging in / how members Performance use / benefits Hackney Video the NMPA members
Performance Propeller Tim Hackney
Video stainless steel polishing presentation staring Tim
Power Tech - Steve Powers
Steve presented the Impact of pitch change on RPM: A scientific basis for RPM calculations, and why the 400 rpm rule of thumb is increasingly irrelevant. Steve showed various scenarios, and how very low pitches and very high pitches produce very different results from the middle pitch band. Also he produced files and handouts that show how this is further impacted by motor rpm’s, and how low rev diesels and high rev 4 strokes further complicate matters.
ZF Marine – Andrew MacDonald
Andrew presented A Guide to Common Propeller Metals - This seminar discussed the major differences between a few of the most commonly used propellers metals Bronze, NiBral and SS; Material properties will be related to overall propeller design, specifically with regard to corrosion behavior, blade strength, casting happened and general performance.
NMPA Certification review – Larry Kindberg
Larry presented what happened at the November 1st Certification day at the R&R prop shop and and testing.
FJ Propeller – Greg Platzer
Golden Nuggets - Several practical generic propeller formulas will be presented. Including how to determine propeller EAR from scanned chord lengths, how to determine the effective pitch of a scanned prop with variable pitch (useful for pitch mods) and how to determine the drag of a stopped propeller (useful for sail boaters and others). Copies of the formulas set up as “plug n chug”. Excel spreadsheets are available.
Propulsion System Performance Optimization - Advanced propulsion design and analysis techniques can provide benefits beyond just propeller optimization. This presentation highlighted the rational for and the results of some advanced propulsion system engineering being performed for larger pleasure, commercial, and military craft.
Welding aluminum propeller videos with Aladdin 3 N 1 rod from Gary L and Tim H. look for these to be available for members Online.
Pesco - Mike Meyers Mike showcased a number of shop projects that he has been thinking about for years but has finally acted on this year.