KirTech LAB

Thanks all!!! There are no gear racks in this model! I used a thread that is winded to the reel! Due to 1:40 gear ratio and a simple polyspast system the extension is provided by one M-motor. For stability improving all the motors are placed in the bottom of the moving part of the crane!

It depends on the distance between bogie and tower :) The yellow container on video includes two weight-bricks 2x2x6. For additional stability it is possible to add in the base of the tower four more BB!

Hello all!!! I want to show my funny MOC - Tower Crane Mk II (the first Tower Crane is a history now :) It has four RC functions (four M-motors) and it is telescopic! Its normal height is 145 cm. But it can rise himself up to 210 cm! For the counterweight i used three battery boxes with batteries Video: Thanks for watching!!!

Super!!!

Good idea!!! Unfortunately i don't have so many switches :)

I want to share some ideas about increasing a quantity of independent functions in Power Functions system. Sorry if this theme was discussed previously. And very sorry for my English! Several receivers tuned to the same channel and connected by the classical scheme will execute commands simultaneously. In order to make its operation independent we should separate the reception of control commands between these receivers. The easiest way to do it - to turn one receiver on and the other off. For simplicity i’ll consider two receivers tuned to the same channel. In this case, each receiver is connected to its own Battery Box (BB), and for their turning on and off we can use a separate motor (M), which will be called the mode switch (Fig. 1). The mode switch turns off one BB and turns on a second at the same time. Fig. 1 The best variant for this motor connection - to use a third separate BB, but this is not always acceptable because of the large mass and size of the BB. Instead, we can use two motors with mechanical link as shown at Fig. 2. However, such a system may contain some issues: the emergence of a dead zone (if both BB will be turned off), the establishment of the equilibrium state (the opposite situation - the second BB is turned on, and the first did not have time to shut down.) You must also provide a way to disable both BB at a time, until the model is gathering dust on the shelf. Fig. 2 Tempting solution is to use the Control Switch 8869 with a control motor (Fig. 3). This will remove the additional BB. Unfortunately, such a system will not work, because the polarity switch, though not powered motors in the neutral position, but the receivers are turned on at any position of the switch. Fig. 3 How many independent functions can be obtained in this way? If we’ll donate one channel of a receiver to the mode switch, we get 13 useful functions. Mode switch can also be combined with useful function, such as the compressor, because it is indifferent to the direction of rotation of the drive shaft - then get 14 functions. The same result can be achieved using only one BB and without turning off the receivers. To stop the receiver to receive commands from the RC unit we must interrupt line-of-sight between RC unit and receiver. This can be done by installing shutters on the model, and using mode switch that will close alternately different groups of receivers. If you need periodically switching between modes, it is convenient to use a rotating disk with slots. Using the RC unit with speed control, you can simultaneously act as both receivers - and "active" and "closed" - just issue the necessary commands before the next change of the mode. Since this control unit operates with a single command, the motors will work even if the link between control unit and the IR receiver is interrupted. The disadvantage of both approaches is increasing of the number of IR receivers. Using motors in conjunction with the details which are the heart of gearboxes, we can also significantly increase the number of independent functions in our models. A good example is the excavator 8043, which uses a 4 channel to perform 6 useful functions (Fig. 4). By a simple extension of this scheme, we obtain 14 functions. Fig. 4 With a challenging extension we have two to the power of eight = 256 functions. Thus one engine is distributed to the actuators, as shown in Fig. 5 (here is shown three-stage system with eight functions on the output). The limitation of this system - at any time is carried out only one function. Fig. 5 I am sure there are many other possibilities to increase the number of functions – all is in our hands and inventiveness!

Excellent work! Especially design!

Maybe i did not understand your question. Drive axles construction is very similar to rear axle of 8070 supercar - drive shaft is mounted inside the parallelogram that's why it has no way to separate...

Unfortunately i haven't four new hubs with steering. Maybe i'll build a model with classic steering system, but it will be another model :)

Thanks! I really needed 3l links with ball joints and i remembered this parts. I had a worry about protruding balls, but they do not contact with tires so all is ok!

So, the question was resolved without me :) Yes, the central differential gear is working like central differential without any wheels sliding. Maybe i'll working under instruction after L-motors mounting! I'll add picture later. Controller consists of two 9398-like controllers placed sideways. Thumbs controls the steering and the acceleration is controlled by index finger.

Thank you! So, you'll be disappointed if you see technical stuffing - it is really primitive! Here there is transmission (not in scale - just for illustration): I considered several variants of steering mechanisms, but the most reliable, fast and compact was just put two servo-motors. First of all thanks for positive opinion! Of course, you are right about Cuusoo! But with Cuusoo or without - this model is excellent platform for some new ideas proving. I want to try L-motors and new motor connection way that gives even more power than V2 receivers (at least i hope so :) )

All have a nice day!!! I want to tell you about my current project – 1 : 10 RC model of the SuperCar from “The Fast and The Furious 6”! Its total size – 52 x 22 x 9 cm. Weight – 1.5 kg. So, what do we have? First of all the the model is really fast due to two powerful Race Buggy motors and new V2 IR Receivers, and now I am working on the replacement of the rarity Buggy motors by new L-motors without speed loss. The main model’s feature is independent front and rear steering. This feature makes the car super-maneuverable! The model has AWD with three differential gears and full independent suspension. There are three sets of LEDs under safety cage arcs. Fake exhaust system: All features you can see here: Thanks for watching!

No, Power Puller wheels are much wider!

Compressor: I did not use autovalves. I tried a lot of valve constructions and i use rather compact variant shown below. Its width is 4 studs, but i use a little trick so i mount 3 valves within 9 studs. The "mode switch" with shutter:

i don't know for this particular model, but in general this is not entirely true! There are some ways to increase the number of independent RC functions. I faced with the problem of "8 channels" during my Grader creation. Some variants i suggest here - http://www.doublebrick.ru/articles/kolichestvo-funkciy-v-sisteme Unfortunately, at this moment the article exists only in Russian.

I don't know special term for this mechanism. Additional tilt angle is needed to compensate a front axle drift that is caused by the load on the mouldboard.

The front wheels chamber angle is near zero! Front wheels can tilt simultaniously - this is the feature of the most graders. Yes, i did "shutter" that covers top part of the IR Receiver. I'll upload illustration later. I did not use autovalves. I use some simple RC valves. Compact RC valve consists of M-motor, worm gear and 24t gear. I considered this variant, but it is desirable to have the third battery box to realize it, that's why i found another solution.

Thank You! No, virtual model building is too difficult task for this project... Thanks! Yes, the wheels are a little smaller than the scale require :(

Hello all! I want to present my MOC - remote controlled (RC) Grader. Total construction time – about 4 months. Total length without rigs – about 80 cm. Weight – 5 kg. Total parts quantity – 5200. There are 12 independent RC functions: five mechanical: - All-Wheel Drive (3 x XL); - Two-stage steering (1 x L – forward wheels steering, 2 x M – articulated chassis); - Forward wheels tilt (1 x M); - Mouldboard rotation (1 x L); and seven pneumatic (5 x M – I used scheme with dependent and independent valves, as illustrated on picture below, so I exclude two additional motors): - Forward and rear PPTOs; - Mouldboard attack angle; - Horizontal mouldboard shift; - Diagonal mouldboard shift; - Left and right main mouldboard cylinders. The two-pump compressor is auxiliary function and it has independent RC too (1 x M). All of these functions are provided by 17 Power Function motors connected to seven IR Receivers and two AA-Battery Boxes (electric scheme of the model you can see on the picture below). Model composition: Total pneumatic hoses length – 14.8 m. Scheme of pneumatic connections: The model has opening doors with locking, realistic mirrors and lights, some versions of rigs – forward (additional blade with pneumatic control or additional weight for mouldboard pressure increasing) and rear (pneumatic controlled ripper). Opening bonnet makes possible a visual control of pneumatic valves working. Paralleling of the Power Function channels is realized by covering/uncovering some IR Receivers by using independent RC channel (mode switch). The mode switch consist of three M-motors, one of them is used for dependent pneumatic valves management. The model is very big, so I create special platform for its transportation. And a small video demonstration: Thank you for your attention!