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|About the EFO Club of southeastern Michigan, USA
Announcing Upcoming Electric Events latest event info
Complete Ampeer Index, all of the Ampeers with descriptive article information. Contains links to all of the Ampeers from March 1988 through the present.
Review: aerofly RC 7 RC Flight Simulator, Ken Myers reviews this simulator. April 2014
Electric Power Basics: A Power System Introduction and Some BASICS
Lithium Polymer Battery Technology: An Introduction by Frank Siegert, translated by John Julian and formatted by Ken Myers - an extremely important background article for understanding LiPo batteries.
Learning About LiPo Batteries, This is a continuing series of 'articles/presentations' regarding LiPo batteries. 04/10/2016 - Parts 1, 2, 3 and 4 are available.
Emeter II: First Impressions and Use Continuing Information
EVERYTHING YOU WANTED TO KNOW ABOUT ELECTRIC POWERED FLIGHT An E-Book by Ed Anderson, President, Long Island Silent Flyers. The link, using the book title, is in Adobe Acrobat format. In this beginner's guide, I've provided active links within the document for reading online to the sources and articles used to compliment the e-book. It is also formatted for printing, and it is 49 pages long.
Glow to Electric Power System Conversion
Wing Cube Loading (WCL): What it is and how to use it, by Ken Myers - updated 1/3/2014
MODEL DESIGN & TECHNICAL STUFF: WING CUBE LOADING (WCL) by FRANCIS REYNOLDS , Model Builder - September 1989
Aircraft Performance Parameters Revisited : WING CUBE LOADING, by Roger Jaffe, Model Builder - June 1994
3D Wing Loadings: a Better Way to Scale Models and Compare different size models easily by Larry Renger, Dec. 1997
Wing Cube Loading (WCL) Calculator online from our friends at Electric Flight UK
Electric Twins: Are You Ready, Ken explains what planes make good electric twins and how you can prepare yourself for flying twin-engine aircraft.
Servo Tests Brian Taylor shares the results of his tests and research on servos.
Servos, I Don't Know Jack!, Ken Myers discusses what he knows, has learned and doesn't know about choosing an appropriate servo.
Comments Regarding the December 2013 Article, "Servos, I Don't Know Jack", Ampeer readers share their thoughts on this article and provide some information.
The Servo Conundrum Continued, Ken Myers continues his research into selecting the appropriate servo(s) for a given RC model airplane.
More on Selecting Servos, David Hipperson shares his thoughts on selecting servos. David Surry also shares his thoughts on this topic.
Measuring Maximum Servo Torque, Ken explains how to measure servo torque. (See correction in article below)
Measuring Maximum Servo Torque Revised, Ken Myers corrects a HUGE oops in his March article on this topic. Sorry!
Finding Required Servo Torque Using a Nomogram/Nomograph, Plenny Bates describes how to use a nomograph to calculate required servo torque.
Control Surface Weight and Servos, Steve Ralph shares an observation regarding the weight of the moving surface and servos.
More on Servo Sizing, Keith Shaw shares information on servo sizes he's used.
Servo Spreadsheet - Data collected in .xls format regarding the plane's weight, mission or type and lists the servo chosen with its stated torque. Frequently updated.
| Keith Shaw on proper electric powered RC design, transcribed from his tech-talk to the EMFSO (Electric Model Flyers of Southern Ontario) by Martin Irvine of Kingston, Ont. in 1992. This is a timeless "How to" on designing electrically powered RC planes. It is in Adobe Acrobat .pdf format.
Keith's original article/talk was split into four parts to be sure that it would fit on floppy disks.
Keith Shaw's "Electric Sport Scale" article from the July 1987 Model Builder
Keith Shaw's "Charging Into Electric Flight" - A Primer from the Master, Radio Controlled Sport Flying, January 1994.
Keith Shaw's "The Art of Low Power Aerobatics: Maximize your performance with energy management" originally in Model Airplane News, Feb. 1996. Keith describes how to reduce drag, set up the CG properly using the "Dive" technique and get the most from your plane for the least power.
Cobra C-2217/20 Brushless Motor Ken Myers tests this motor with specifications given and prop recommendations. Review is in the July 2016 Ampeer and it is compared to the EMAX GT2218/11.
Cobra C-2820/14 Brushless Motor, Kv=840 Ken Myers tests this motor with specifications given and prop recommendations. Review is in the September 2014 Ampeer.
Cobra C-4120/18 Brushless Motor, Kv=540 Ken Myers tests this motor with specifications given and prop recommendations. Review is in the January 2014 Ampeer.
EMAX GT2218/11 Brushless Motor Ken Myers tests this motor with specifications given and prop recommendations. Review is in the July 2016 Ampeer and it is compared to the Cobra C-2217/20.
Hacker A50-12S V2 Outrunner Ken Myers tests this motor with specifications given and prop recommendations. The EFO members, at the February meeting, also helped with the collection of the data. Review is in the April 2013 Ampeer.
HXT 42-60/06 Motor Review - now known as the Turnigy TR 42-60C
K2 Energy 26650 cells - another lithium iron phosphate cell
Effects of Temperature On the Battery (formerly Lithium Face Off): A Head-to-Head Comparison of LiPo, A123 & Emoli - The cells are compared, flown and evaluated. It also includes the effects of temperature on these cells.
Motor Kv, what it is and how to measure it. A Kv Spreadsheet Calculates the Kv with the input of the drill press RPM and AC voltage measurements. The spreadsheet is linked in the article.
O.S. OMA-3820-1200 Review, Ken reviews this O.S. ".25-size" racing outrunner and makes prop suggestions.
O.S. OMA-3825-750 Review, Ken reviews this O.S. ".30-size" outrunner and makes prop suggestions.
O.S. OMA-5010-810 Preview, Ken PREVIEWS this O.S. "4-stroke .52-size" outrunner and explains why the battery and prop data for this motor, as presented by O.S. Motor and Tower Hobbies, is inaccurate and less than useful. The article is now in the February 2013 Ampeer.
O.S. OMA-5010-810 Review, Ken REVIEWS this O.S. "4-stroke .52-size" outrunner and provides a somewhat more accurate battery and prop chart than the one supplied by O.S. Motor. The article is now in the March 2013 Ampeer.
OMA-5010-810-preview.htm, updated 08/20/2013 with warning about the reverse thread socket head cap screw that holds the shaft in.
Plane and Power System Excel Workbook, over 600 records. Includes data on electric planes, glow and gas planes and their power systems.
Scorpion S-4020-12 Outrunner tested - also how it was used in an Electro Flying Fusion
Timing Test - demonstrates the effects of different timings on power system output
TowerPro 3520-7 Motor Review
Turnigy G25 710Kv Ken Myers tests and reviews this motor. Review is in the April 2013 Ampeer.
|Aircraft Reviews, Construction & Conversions
E-flite T-34 Mentor RTF Notes, problems, solutions & conversion to "A123" cells - thoughts on using as an "aileron trainer"
Flite 40 Conversion of cheap low-wing ARF to e-power using a 6S1P "A123" 2300mAh pack on RC Groups.
Hitec (Multiplex) Weekender Extra 300S ARF Review of this P2GO Extra stand off scale.
Maxford USA Antonov An-2 ARF Ken Myers' review of this almost ready to fix (ARtF) classic biplane. Includes assembly hints and tips.
Min-E Mambo Ken's conversion and a tribute to the Sterling Minnie Mambo. Includes plans in Adobe Acrobat .pdf format.
Multiplex EasyStar RTF Assembly notes and review, includes upgrade to 2S1P "A123" 2300mAh pack
parkzone T-28 Trojan RTF Notes, problems, solutions & conversion to "A123" cells
Sportsman Aviation Sonic 500 25-46 ARF Review and conversion to e-power on RC Groups
Sports Aviation Ryan STA 40 ARF Review and conversion to e-power on RC Groups
Sportsman Aviation Sport Stik 40 ARF Low Wing Review and conversion to e-power on RC Groups.
Son of Swallow is my own design based on the Fred Reese Swallow, the precursor to the Cloud Dancer series of planes. Designed for use with a 3S1P "A123" 2300mAh pack. On RC Groups
| Unlike other sites, there is NO paid advertising on this site! When you see an ad link, Ken Myers uses and recommends the product(s), supplier or manufacturer. He uses the
"stuff" or supplier himself!
Click image to visit the Tower Hobbies site