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Shahid Banglawala  |  Jun 16, 2014  |  0 comments
So, metal or plastic gear? What's it to be? This tutorial is all about servos, how they work, how to fit them and which one's to choose. First let's look at how they operate. ANATOMY No matter what the size or type, the components that make up a servo are practically the same, and knowing what these parts are will help you make more informed choices on what servo to buy. Circuit board.
David Ashby  |  Apr 18, 2014  |  0 comments
It's been pretty quiet on the charger front for the last few years. There were a glut of cheap and reliable new units on offer a while back, all in similar vein - anodised blue metal body, four programming buttons, 50W output, comparable software - it seemed like they'd all come from the same sausage machine! My first good charger was a Hitec CG335, but that was last century, and Hitec didn't have anything to offer when Li-Pos came to re-shape my flying activities. Well, they're back, and have just pushed through the saloon doors with one of the nicest-looking chargers you'll find; it even manages to kick sand at Graupner's blingy units. I've never invested in a big charger, simply because the 50 – 100W units I've accumulated over the years have worked well enough, although I now find an increasingly regular need for a more powerful charge output, especially as I tend to be using mostly 5s and 6s Li-Pos nowadays, sometimes hooked in series for larger models.
Tim Mackey  |  Dec 30, 2013  |  0 comments
Chargers can seem a little confusing at first but a good charger will soon become a valued tool. It seems that not long ago we had a very simple life when it came to batteries. Other than a few pioneering electric flyers, almost every R/C modeller had fairly standard equipment, usually comprising a model fitted with a two-stroke or four-stroke i. c.
Simon Cocker  |  Aug 02, 2013  |  1 comments
MVVS are a Czech manufacturing company with an established reputation for engineering excellence. Although the firm has been making model i. c. engines since 1952 I was still surprised to see that it has turned its resources to the electric flight scene with this, the launch of a home-grown brushless motor range.
David Ashby  |  Jun 28, 2013  |  0 comments
Last Christmas my wife gave me an indoor helicopter, the type where the flight battery is charged directly from the transmitter (Tx). Whilst this method is very convenient it wasn't long before the Tx batteries needed replacing, especially as I was rapidly becoming addicted to this micro hovering marvel. I tried swapping the four single-use AA batteries that power the 6 volt Tx with rechargeable batteries. However the Tx battery status indicator didn't register full charge so I aired on the side of caution and left the helicopter firmly grounded.
David Ashby  |  Sep 01, 2011  |  0 comments
For years, decades in fact, model flyers have wondered just what’s happening to their aircraft as they streak across the sky. Models can be subject to stresses that are difficult, if not impossible, to appreciate from the ground while, stresses aside, engines and power systems can behave differently when they meet moving air. Flyers have asked themselves just how much current the electric power system is drawing? Does the electric ducted fan jet draw more current in the air than on the ground? Will the combined effect of those servos strain the battery? How high and fast is the model travelling? And, not least, is the fuel tank empty yet! In seeking answers, they’re questions to which some flyers have developed convoluted homemade apparatus. The battery that becomes exhausted unexpectedly has been the bane of electric flight and this in-flight current draw question has prompted more than one pilot to leave a wattmeter connected in the model and fit a video camera specifically to film the wattmeter’s LCD screen in flight – a rather weighty solution that one assumes was reserved for a model large and powerful enough to carry the equipment.
David Ashby  |  Aug 18, 2011  |  0 comments
WIth brushless electric motor sales decimating those of glow engines and small glow engines in particular, it's perhaps no surprise that O. S. have finally released their own range of brushless outrunners. There are four initial releases all designed in-house and featuring a special cooling system that brings air inside the motor for improved efficiency and power, a strengthened centre body, large ball bearings and a prop driver machined from stainless steel for strength and durability.
David Ashby  |  Apr 01, 2011  |  0 comments
Scientists working on the possibility of electric powered manned flight at the Hamburg Geschellshafts Zentrum (HGZ) in Germany have developed a revolutionary new type of battery. The new cells are based on a substance called ‘colloidal selenium’. “Selcol” batteries, as they will be known, have a number of significant advantages. Their charge density is about 20 times higher than Lithium Polymer, offering the prospect of much reduced size with greatly enhanced charge capacity.
Brian Cooper  |  Dec 22, 2010  |  0 comments
This review was first published in 2005, the S3152 servo remains on sale. The advances in servo technology haven’t really caused much excitement among modellers, have they? We’ve just taken for granted the servos’ steadily increasing rotational speeds and torque, and accepted that their increasing cost is the price of progress and reliability. Once we’ve paid our money, you might almost say, it’s been a case of fit, forget, and fly. And, because conventional analogue servos are so reliable, when most modellers think of digital servos - if they think about digital servos at all, that is - they only do so in terms of their relative expense rather than their advantages.
David Ashby  |  Nov 01, 2010  |  0 comments
Distributed by Jamara, PLASTI DIP is a newsynthetic rubber coating (liquid rubber) that dries in the air and can be easily applied by spraying, brushing or dipping. The insulated rubber coating protects, adds grip, seals yet remains flexible while resistant to moisture and acids. It adheres to metal, wood, glass, stone, rubber, concrete, fabric, rope, carbon, fiberglass, fabrics, glass wool, making it ideal for a variety of tasks around the workshop. It’s available in three versions – dip, tape and spray from all good Jamara stockists – the dip tin retailing at £19.
David Ashby  |  Oct 06, 2010  |  0 comments
With 3D fast becoming the 'must have' for cinema and television, it's no surprise to see thatthe World's first 3D R/C simulator has just arrived courtesy of the well known Reflex brand. Reflex XTR2 V. 5. 05.
David Ashby  |  Sep 28, 2010  |  0 comments
UK distributor J. Perkins has just announced delivery of Acme's FlyCam ECO version 2 - the lightweight airborne camera system. This update brings the following improvements; resolution improved to 720x480 weight reduced to just 15g removable camera head ribbon cable to aide remote positioning Like the old unit, this new ECO records to a micro SD card (8GB max) and gets power from a spare receiver channel. It has three modes - single shot, video at 30 fps and continuous shooting and retails at £39.
David Ashby  |  Aug 13, 2010  |  0 comments
At a quick glance you’d dismiss JP’s new widget as just another watt meter yet watt meters are becoming more sophisticated and, in the case of the Power Analyser, will do far more than just measuring the performance of a power system, important though the task is. The Power Analyser’s remit then is; • Watt meter • Voltage checker • Battery balancer Supplied with simple, well written instructions, the Analyser is brush-aluminium with a two-line LCD display that’s easy to read. The input and output sockets are Deans connector based, a 7-pin battery balance connector port sits alongside the output socket and three push input buttons are sited below the LCD. It’s worth noting that just JST-EHR and JST-XH balance plugs can be connected to the pins, said pins can't directly accomodate FlightPower of ThunderPower plugs.
David Ashby  |  Aug 03, 2010  |  0 comments
Graupner's new charger is a slight upgrade on the Ultra Duo Plus 40 introduced last year. The 45 brings a higher battery discharge rate but little else as far as we can see. Notwithstanding, this is a capable unit, tough and very well made with dual outputs and a large blue back-lit display that highlights a lot of information. It says '250-watt' on the box which rests with output 1 while output 2 is rated for a max of 50 watts.
Elliot Howells  |  Mar 04, 2010  |  0 comments
Big and clever - the new Jeti Max BEC 2D Jeti's Max BEC 2D is a linear voltage regulator offering power inputs for two 2S Li-Po batteries. It's fair to say that 2. 4 GHz technology is now well established and firmly loved in the field of model radio control. It'sadvantages are almost too many to list however, as yet,few companies seem to exploit fully one of the biggest strengths available, that of telemetry.

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