Lithium Polymer Batteries &Product Announcements &Thunder Power RC News July 16, 2008

All-New Race Series Batteries for Surface Applications

Thunder Power RC is proud to introduce their first series of LiPo batteries designed specifically for use in surface applications. The all-new Race Series batteries further expand Thunder Power RC’s product offerings in a continued commitment to bring high-quality, high-performance and high-value products to RC modelers worldwide­­­–including those in the surface market too!

Race series LiPo batteries feature premium, factory-matched cells housed in impact-resistant cases designed to protect the cells in a variety of conditions. They also offer a level of power, performance and reliability never before seen from NiMH and even other LiPo battery offerings in the market today. The first release of 2S 7.4V and 3S 11.1V batteries, in capacities from 3300mAh to 5400mAh, will deliver maximum continuous discharge rates up to 30C, offering sport and professional racers alike the perfect, drop-in fit battery for almost any 1/10 scale application–from on-road oval and touring cars, to off-road buggies, trucks and monster trucks.

Other Race Series battery features include:

  • Choice of rounded, standard or large housings to fit almost any 1/10 scale vehicle
  • Factory-installed main power leads (10- or 12-gauge) and connectors (Deans® Ultra Plug® or Traxxas® High-Current)
  • Thunder Power balance connector and leads
  • ROAR approval (except THP50002SPRD and THP54003SSRT)
  • More margin (when sold at MAP) than most other brand LiPo batteries for surface applications

Sport Race Series Batteries

Sport Race Series batteries offer incredible value and performance beyond all other batteries in their class. 20C continuous discharge rate capable cells, 12-gauge wire leads and factory-installed Traxxas High-Current connectors make them the perfect drop-in upgrade for all Traxxas electric vehicles–brushed or brushless motor powered. THP54003SSRT can even propel the popular Rustler VXL to speeds of 70mph and beyond!

Item # Capacity & Voltage Max. Cont. Discharge Max Burst Discharge Max Cont Current Max Burst Current Hard Case/Type Dimensions W x L x H (in) Weight (oz) Wire Gauge/Connector MAP
THP54002SSRT 5400mAh 2-Cell 7.4V 20C 40C 108A 216A Yes / Standard 1.85 x 5.4 x .93 9.8 12 / Traxxas 109.99
THP54003SSRT 5400mAh 3-Cell 11.1V 20C 40C 108A 216A Yes / Large 85 x 5.4 x 1.3 13.9 12 / Traxxas 159.99

eXtreme Race Series Batteries

eXtreme Race Series batteries offer the same power and performance of their 25C eXtreme V2 aircraft battery counterparts, yet are optimized for use in surface applications. With the ability to maintain higher voltage under load and to offer more cycle life than other batteries in their class, they’re an excellent choice for 1/10 scale racing applications. Plus, all eXtreme Race series batteries are equipped with 10-gauge wire leads and a Deans Ultra Plug connector.

THP33002SXRD 3300mAh 2-Cell 7.4V 25C 50C 82.5A 165A Yes / Rounded 1.85 x 5.4 x .93 7.0 10 / Deans 74.99
THP51002SXRD 5100mAh 2-Cell 7.4V 25C 50C 127.5A 255A Yes / Standard 1.85 x 5.4 x .93 10.4 10 / Deans 119.99

Pro Race Series Batteries

When you’re looking for LiPo batteries that feature the lowest resistance and deliver the most power available in the surface battery market today, look no further than Pro Race Series batteries. Their incredibly low resistance, 30C continuous discharge rate capable cells, direct-soldered 10-gauge wire leads and Deans Ultra Plug connectors offer the minimum resistance possible for maximum power and performance in even the most demanding race applications.

THP39002SPRD 3900mAh 2-Cell 7.4V 30C 60C 117A 234A Yes / Rounded 1.85 x 5.4 x .93 8.4 10 / Deans 99.99
THP50002SPRD 5000mAh 2-Cell 7.4V 30C 60C 150A 300A Yes / Standard 1.85 x 5.4 x .93 10.4 10 / Deans 129.99

——
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Lithium Polymer Batteries &Product Announcements &Thunder Power RC News July 16, 2008

All-New 2600mAh Pro Lite V2 Series Batteries

Including one of the best batteries to date for Blade® 400, T-REX 450 and other mini-class helis

Thunder Power Pro Lite series LiPo batteries have been the standard by which all ‘lite’ weight, high-performance LiPo batteries have been measured since 2005. Often imitated but never duplicated, Pro Lite series batteries still offer the highest energy density (capacity and power per weight) in the RC LiPo battery market today. They’re also the industry’s best-selling and most reliable series of LiPo batteries ever.

The all-new 2600mAh Pro Lite V2 series batteries offer the same great benefits of current Pro Lite series batteries–including the most capacity, at the lowest weight and in the smallest size possible–but are the first to feature the new V2 chemistry. This chemistry offers increased discharge rate capability, as well as higher voltage under typical and heavy loads. The extremely low resistance of the V2 chemistry allows the 2600mAh batteries to deliver more power than most 2000-2200mAh 25C+ discharge capable batteries, but with 20-30% more useable capacity at nearly the same weight.

For example, the weight and dimensions of the new 2600mAh 3S 11.1V Pro Lite V2 battery (THP26003SPL2) are almost exactly the same as the ever-popular 2200mAh 3S 11.1V eXtreme V2 battery, yet the 2600mAh battery typically offers similar or more power and more flight duration in the same application. Flight tests by extreme 3D heli pilots have also proven that THP26003SPL2 is now one of the best batteries of choice for maximum power, performance and duration in E-flite® Blade 400, Align T-REX 450 and other mini-class helicopter models! The performance surpasses that of the most popular batteries used for these models today, and it’s available at a price that offers incredible value.

You can see the amazing performance of the 2600mAh Pro Lite V2 battery in the discharge curve below. The ability to deliver more than 95% of the rated capacity at discharge rates up to 18C is no ordinary feat, and makes it unlike any other battery ever available in its class before.
Available in configurations from 2S 7.4V to 6S 22.2V, 2600mAh Pro Lite V2 batteries are perfectly suited for small to mid-size, 450- to 15-size airplane models, and mini to mid-size helicopter models. They’re a great replacement for 1800-2200mAh batteries when added flight duration, with little to no expense of added weight, is desired. And with prices similar to or less than other products in their class, the new 2600mAh Pro Lite V2 batteries will further establish the Pro Lite series as not only the technology and performance leader, but also as the leader in value too!

Item # Capacity and Voltage Max. Cont. Discharge (x Capacity) Max Burst Discharge Max Cont. Current Max Burst Current Dimensions W x L x H (in) Weight (oz) MAP
THP26002SPL2 2600mAh 2S 7.4V 18C 30C 47A 78A 1.35 x 3.9 x .70 4.2 49.99
THP26003SPL2 2600mAh 3S 11.1V 18C 30C 47A 78A 1.35 x 3.9 x 1.0 6.2 74.99
THP26004SPL2 2600mAh 4S 14.8V 18C 30C 47A 78A 1.35 x 3.9 x 1.3 8.1 99.99
THP26005SPL2 2600mAh 5S 18.5V 18C 30C 47A 78A 1.35 x 3.9 x 1.6 10.0 124.99
THP26006SPL2 2600mAh 6S 22.2V 18C 30C 47A 78A 1.35 x 3.9 x 1.9 12.0 149.99

——
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RC Airplanes July 11, 2008

RC Model Airplane Aerobatics Part III – Advanced Aerobatics

Now that you know how to perform basic and intermediate level RC model airplane aerobatics, you can progress to the most advanced maneuvers. This article lists some of the most interesting advanced aerobatic maneuvers in order of difficulty.

Immelmann Turn

The Immelmann turn is a type of aerobatic maneuver named for World War I fighter pilot Max Immelmann. When done precisely, the Immelmann turn is a very crowd pleasing maneuver, and can be used in combination with a wide variety of other aerobatics. Perform an Immelmann turn by using full throttle, turning the aircraft into the wind, and then pulling up into a vertical climb. When climbing, use the rudder and elevator controls to keep the aircraft climbing in a straight line. After gaining a significant amount of altitude pull back on the elevator to enter inverted flight. Keep the wings level, and execute a sharp 180 degree roll, bringing the aircraft back to straight and level flight. The net effect of this maneuver is that the RC model airplane is higher, and facing the opposite direction then it was during the start of the maneuver. Take a look at this picture, which shows the different parts of an Immelmann turn:

Split S

The Split S is basically the same as an Immelmann turn, but performed in the opposite direction. As always, begin by turning the aircraft into the wind. Then enter a vertical dive. Pull out of the dive by applying more down elevator, so that the aircraft levels off and enters inverted flight. As with the Immelmann turn, exit inverted flight by rolling 180 degrees in a left or right direction. This figure illustrates the different parts of a Split S:

Cuban Eight

A Cuban eight is one of the most challenging, and interesting, aerobatic maneuvers to perform. Performing a Cuban Eight involves making the airplane follow a vertical path resembling a horizontal eight in the sky. Make sure that you perform this maneuver at a high altitude, this is not to be attempted at twenty feet off the deck.

Start by facing into the wind, and applying full throttle, then pull up and perform a graceful half loop (1). Don’t level off after reaching the top of the loop (2). Instead, continue to use up elevator until the RC model airplane enters an inverted 45 degree descent (3). Wait until the RC model airplane reaches the midpoint of the eight – or about halfway up the first loop, and then perform a crisp 180 degree roll (4). Keep in mind that the RC model airplane will be inverted before you perform the roll.

After performing a roll, level off from the 45 degree descent and pull up again (5). Perform another half loop (6), and then begin another 45 degree descent (7). Wait until the midpoint of the eight (8), and perform a 180 degree roll like in step 3. After that, gradually level out and enter straight and level flight (8).

Ideally, the Cuban eight should be completely symmetrical along both the horizontal and vertical axis.

Congratulations! You can now perform advanced RC aerobatics!

——
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Product Announcements &Thunder Power RC News July 11, 2008

New Thunder Power 450 RC Helicopter Carbon Fiber Rotor Blades

Thunder Power RC has just released a brand new product. The TP-325CF is a set of two carbon fiber rotor blades for your 3D RC helicopter. A length of 325 mm makes them perfect for almost any 450 sized RC helicopter, including the T-Rex, Blade 400, and Thunder Tiger Mini Titan, and Dragonous.

The carbon fiber 450 sized RC helicopter rotor blades feature:

  • Foam core construction – reducing the weight of each rotor blade to just 21 grams.
  • Precision airfoil – Each blade is precision molded to an airfoil specifically designed to improve 3D performance.
  • Carbon fiber covering – Carbon fiber construction makes the rotor blades extremely stiff and resistant to stress.
  • Marked blade tips – The rotor blade tips are colored white, to add visibility to the rotor disc during flight

——
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Phone: 1-800-979-9794 / 306-955-9907
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RC Airplanes July 4, 2008

RC Model Airplane Aerobatics Part II – Intermediate Level Aerobatics

Introduction

After learning about the basic aerobatic maneuvers, you are probably looking forward to trying something more advanced. Before we explain these new and exciting maneuvers though you will need an aerobatics capable aircraft.

Most of the aerobatic maneuvers described in the first part of this series are relatively gentle, and almost any 4 channel RC plane is sufficient to perform them. The intermediate aerobatics described in this article need a moderately capable RC model airplane, preferably with a large engine or motor and relatively little dihedral (upward bend) in the wings.

The process of choosing a second RC model airplane is daunting, and beyond the scope of this article, but here are some general points to consider when choosing a second RC model airplane:

Try to choose a model that uses the same radio hardware and engine as your trainer. That way, you can use the radio and engine from your old trainer in your new airplane – instead of buying them new.
Look for a RC model airplane with a mid to low wing. Most trainers have high
wings mounted on top of the fuselage while the more aerobatic aircraft have low wings, mounted at the bottom of the fuselage.
The RC model airplanes advertised as good second models generally are. Consider this when buying.

If you used a nitro fuel powered trainer with a .40 or .46 sized engine, a Sig 4 Star 40 is a great second RC model airplane. It features a low wing design, very forgiving flying characteristics, and will work with almost any .40 sized engine and 4 channel radio system.

Now that you have a suitable RC model airplane, we will show you how to do some very fun and crowd pleasing maneuvers.

Stall Turn / Hammer Head

A Hammer Head, or more accurately, a stall turn, involves stalling the RC model airplane, and then using the rudder to pivot and descend. Begin by turning the RC model airplane so that it faces into the wind. Increase throttle to full and use the elevator to climb in a vertical path. Continue this vertical climb, until the RC model airplane stalls. The instant the stall occurs, apply full right or left rudder. This will cause the RC model airplane to tip over on one wingtip. Allow the RC model airplanes nose to point downwards, and recover from the stall as normal. This sketch shows what a stall turn looks like.

Spin

The spin is an aerobatic maneuver which induces an asymmetric stall. This means that one of the RC model airplanes wings is stalled more than the other. The result is a graceful downwards spiral, rotating either clockwise or counterclockwise depending on the direction of rudder input.

You can perform a spin by entering a stall as normal, and then using full up elevator and left or right rudder. The spin will continue as long as you hold the elevator and rudder in their maximum positions.
Exit the spin by applying full rudder in the opposite direction of the spin, and dropping the nose to exit the stall. Be sure to stop the spin at a safe altitude – high enough that you have room for at least one mistake. Take a look at this sketch showing the different parts of a spin.

Snap Roll

The snap roll is a type of “aerial somersault”: a quick, rapid flip around the horizontal axis. When done correctly, it is a very crisp and accurate maneuver. Get ready by flying straight into the wind, with the wings straight and level. After that, apply the following control inputs simultaneously.

  • Full up elevator
  • Full left or right aileron
  • Full left or right rudder

These control inputs should result in a sudden, and rapid roll and upward “snap”, which ends as soon as you neutralize the controls. Be careful though, because snap rolls can sometimes induce spins.

Outside Loop

The outside loop is exactly like the inside loop, but it is performed “inside out”, with the bottom of the RC model airplanes fuselage facing inwards. Perform an outside loop the same way as you would perform an inside loop, but enter the loop inverted. Because the RC model airplane is inverted, you will have to use down elevator to climb. After you exit the inverted loop, the RC model airplane will still be upside down, so perform a half roll on to the side to right it. This sketch depicts an outside loop.

The next article in this series will cover advanced maneuvers, including Cuban eights, Immelmans, and Avalanches.

——
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Phone: 1-800-979-9794 / 306-955-9907
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Other RC Parts & Components July 2, 2008

APC RC Airplane Composite Propeller Motor Shaft Adapter Bushings Explained

All of the APC RC Airplane Propellers include a set of motor shaft adapter bushings, so that they can be used on a variety of different RC airplane motor shafts. It is important to use the correct adapter bushing so your propeller fits snugly on the motor shaft.

Which Motor Shaft Adapter Bushing Do I Use?

To determine which adapter you should use you have to know the shaft diameter the motor you’re using. For example, if your motor has a shaft diameter of 0.313in (7.95mm) then you need to use the APC adapter bushing with an inside diameter of 0.313in.

Inside Diameters of the Motor Shaft Adapter Bushings

Bushing 1 Bushing 2 Bushing 3 Bushing 4 Bushing 5
(mm) 3.25 4.01 5.00 6.02 7.95
(in) 0.128 0.158 0.197 0.237 0.313
(in) 16/125 79/500 197/1000 237/1000 313/1000

* All the APC adapter bushings have the same outside diameter.

Precision Motor Shaft Mounting Procedure

Precision Motor Mount Adaptation Procedures

  1. Each APC propeller’s hub may be precisely adapted to motor shaft diameters of 0.128in, 0.158in, 0.197in and 0.313in by using bushings 1 through 5.
  2. Remove the desired locating ring by twisting.
  3. Insert the ring with draft angle as shown.
  4. The propeller hubs may be adapted to other shaft diameters by reaming the non-precision 0.250in (1/4in, 6.35mm) hole to the size you need.

Never Drill a Propeller, Use a Reamer Instead

In the instructions that come with each propeller, APC tells customers to “drill to desired diameter”. Never drill a propeller. A drill will make an asymmetrical hole and ruin the propeller’s balance. A reamer will make a perfectly centered hole.

Where to Buy APC Electric RC Airplane Propellers

Draganfly Innovations Inc. has a huge selection of APC Electric RC Airplane Propellers. The three types are Slow Flyer, Wide Electric and Electric and range in size from 6 to 24in.
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Information Articles &RC Airplanes July 2, 2008

RC Model Airplane Aerobatics Part I – The Basics

After you finish learning the basics of model airplane flight, you will probably want to progress to more advanced flying. Aerobatics are maneuvers which are performed outside the normal performance envelope of an aircraft. This means that the aircraft is subject to stress, speeds, and attitudes not encountered in straight and level flight. There are several relatively easy to perform maneuvers for a beginner to try. This article will show you the basic maneuvers such as loops and rolls, and later articles will detail more advanced maneuvers.

The Stall

Although the stall isn’t exactly an aerobatic maneuver, you will need to know how to avoid and survive them before you try the basic aerobatic maneuvers which can sometimes cause stalls.

In order to produce lift and keep the RC model airplane flying, air must constantly move over the wings. If the angle of attack (how high the nose is pointed) is increased, then the aircraft will climb and slow down. A stall is a condition of flight where little to no lift is produced by the wings, causing the aircraft to free fall. All aircraft wings have a critical angle of attack, beyond which they cannot effectively generate lift. If this limit is exceeded, then the RC model aircraft will enter a stall.

After entering the stall, the RC model airplanes nose will drop. Most beginning pilot’s first instinct is to pull back on the elevator and attempt to slow the descent. This is actually the opposite of what should be done to recover from a stall. Remember, the lift produced by the wings is proportional to the amount of air moving over them. The only way to increase this airflow over the wings and thus end the stall is to increase the RC model airplanes speed through the air. This is accomplished by letting the nose drop, and then gently pulling back after sufficient airspeed has been gained.

You can safely practice stall recovery by letting the RC model airplane climb to a safe altitude, reducing throttle, and pulling back on the elevator. After inducing a stall, just let the nose drop, increase throttle, and then gradually pull back on the elevator. Once you are comfortable with stall recovery, you can start learning about the fun stuff – aerobatics!

The Loop

The loop is one of the easiest (and most fun) aerobatic maneuvers to perform. Begin by flying the RC model airplane to a safe altitude (about 50 feet should be enough) and into the wind. Increase throttle to full, and gently pull back on the elevator to start climbing. Continue to use the elevator, and let the aircraft enter inverted flight. After the RC model aircraft’s nose starts to point downwards, gradually decrease the amount of up elevator until the RC model aircraft is level again. Take a look at this sketch, which shows what a loop looks like.

The loop described here is an inside loop, performed with the RC model airplanes bottom facing outwards. An inside loop is a much more challenging maneuver, and will be discussed in a later part of this article.

The Roll

The roll is another easy to perform maneuver, consisting of rolling the airplane on its side 360 degrees. We recommend having a RC aircraft with ailerons to perform this maneuver, but some three channel aircraft are able to roll without problems. This sketch shows what a roll looks like. We have colored in one wingtip of the aircraft in the picture, so that you can see the

Start the roll with the RC model airplane facing into the wind. Then apply a small amount of up elevator (to compensate for the loss of lift from the wing) and apply full aileron in the direction that you want to roll. Don’t center the ailerons until the RC model airplane is level again.

Inverted Flight

Flying the RC model aircraft inverted is a fun and impressive aerobatic maneuver. You already have some experience with inverted flight after performing loops and rolls, the two major ways to enter inverted flight.

The loop is the simplest way to enter inverted flight. Enter the loop like before, but at the top, don’t use up elevator. Instead apply a slight amount of down elevator. Because the RC model airplane is inverted, every control input will be opposite to what it is when the plane is flying normally. For example: when flying inverted, use left aileron to turn right, and right aileron to turn left. Likewise: use up elevator to fly downwards, and down elevator to fly upwards. You can exit inverted flight by completing the loop, using up elevator, or rolling 180 degrees. This sketch illustrates the two main ways to enter inverted flight.

Part II of this article will discuss more advanced aerobatics, including snap rolls, stall turns, and
hammerheads.

——
© Draganfly Innovations Inc.
Phone: 1-800-979-9794 / 306-955-9907
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