The Esky RC Helicopter

The Lama V4 RC helicopter comes full built and ready to fly micro helicopter. Its coaxial head design which is counter-rotating is very stable than anyone who has not flown one of these before will become very experienced in a short period of time. The V4 Lama has other features that many other remote controlled helicopters do not have. The strong power of its Esky 8g servo's, and 4-1 controller are great to look at, very low weight and are great on the eyes. The counter rotating blades assist in cancelling out the rotating torque meaning you can hover with ease that other helicopters find hard to achieve. The rudder turning is also assisted and leaves no instability. A great rc helicopter to fly and a fantastic machine will keep you engrossed for a long time. This has got to be one of the best helicopters on the market with its stable flying, performance and flying grace.

All you need for flying this machine comes in the box which consists of the helicopter fully built and ready to do, a 4 channel radio controller, long lasting lithium battery, 12v car battery adapter and AA batteries for the radio controller. The box is even good to look at so great for a gift for a son or dad.

specs:

(1)Main rotor diameter:340mm

(2)Weight:230g

(3)Length:408mm,width:85mm,height:180mm

(4)Power system:180 motor*2

(5) Build: RTF

(6)Transmitter:Standard 4 CH

(7)Mix controller:4 in 1 controller

(W/gyro,mixer,ESC,receiver)

(8)Servo:8g,1.3kg.CM,0.12s/60

(9)Battery:7.4V 800mAh Li-polymer battery

Features:

1.Coaxial, counter-rotating blade rotor design provides incredible stability and positive control.

2.full RC system set Included, ready to fly out of the box.

3.pre-installed ESKY 8g servos and

4-in-1 control unit

4.No installation or assembly required.

5.Dual 180 motors makes the Lama V4 powerful and efficient.

6.800mAh 2-cell Li-Po battery pack is low weight, high power and provides flight durations of 10-15 minutes per charge.

There are many more types of RC Helicopter with the most popular type of model being rc cars which have several varieties such as petrol rc cars, electric and nitro fueled. Aside from them, you also have planes, tanks and robots so a hobby area which spans a wide area. We hope this article has been useful and you check out the Esky Helicopter.

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Cisco CCNP / BSCI Exam Tutorial: ISIS Router Types

To pass the BSCI exam and earn your CCNP, you've got to know ISIS inside and out. There are many similarities between ISIS and OSPF, but one major difference is that ISIS has three different types of routers - Level 1 (L1), Level 2 (L2), and L1/L2.

L1 routers are contained in a single area, and are connected to other areas by an L1/L2 router. The L1 uses the L1/L2 router as a default gateway to reach destinations contained in other areas, much like an OSPF stub router uses the ABR as a default gateway.

L1 routers have no specific routing table entries regarding any destination outside their own area; they will use an L1/L2 router as a default gateway to reach any external networks. ISIS L1 routers in the same area must synchronize their databases with each other.

just as we have L1 routers, we also have L2 routers. Anytime we're routing between areas (inter-area routing), an L2 or L1/L2 router must be involved. All L2 routers will have synchronized databases as well.

Both L1 and L2 routers send out their own hellos. As with OSPF, hello packets allow ISIS routers to form adjacencies. The key difference here is that L1 routers send out L1 hellos, and L2 routers send out L2 hellos. If you have an L1 router and an L2 router on the same link, they will not form an adjacency.

An ISIS router can act as an L1 and an L2 router at the same time; these routers are L1/L2 routers. An L1/L2 router can have neighbors in separate ISIS areas. The L1/L2 router will have two separate databases, though - one for L1 routes and another for L2 routes. L1/L2 is the default setting for Cisco routers running ISIS. The L1/L2 router is the router that makes it possible for an L1 router to send data to another area.

In the next part of my ISIS tutorial, we'll take a more detailed look at those ISIS hellos!

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