KirTech LAB

Hello All! During last month I’ve created a few models and I want to present one of them – it is the Harbour Crane. The model is build in minifigure-scale. It is 68 cm long and 48 cm high. There are four remote controlled functions: - crane moving; - carriage moving; - spreader up/down; - spreader lock/unlock. And of course video demonstration: Thanks for watching!

Thanks all for comments! My city-collection is very small, but i have many friends and i'll try to put my crane into real town :)

Thank you! I built this model for city-containers and they are lifted without problems! It is no necessary to lift heavy weights :) Yes, that's it! Yes :) firstly i wanted to use cables, but the wire is too rigid and i decided to use it for lifting without any cables!

Thanks all! Yes, i spent some time to study real crane mechanisms and i am happy my model seems like real machine! Of course LEGO wires are rather rigid and looks not so beautifull like real.

Yesterday i got my prize № 07124 - it seems that the postman was walking :)

Impressive!!!

Hello All!!! This is my Tunneler – full RC model of boring machine! It doesn’t look elegant, but it is really working! Functions: Manual: - Boring Head - Lights - Conveyer belt RC: - 2-channel moving (left and right tracks) - 3D boring head management (left-right, up-down and extension) - Pneumatic outriggers - Feeder angle changing 4200 parts 3 XL-motors, 10 M-motors It is easy to change boring heads. Direct drive with XL-motor – real power! Working outriggers Into tunnel Video:

approximately

Do not interchange ALL gears - it will result in IR Receiver protection activation! The model will move very fast, but starting only with push and only on perfectly smooth surface :)

Thanks!!! It took me about two weeks. It was very interesting for me to construct really working feeder and to mount rotation part on the chassis! I didn't use LDD - only some outlines on paper.

It will be good, if you show what parts do you have! Universal joints, shock absorbers, gear racks, maybe ball joints...

It is really my case! I have very much ideas and no so much time for building. Ideas are everywhere - outside the window, in movies, in telecasts on Discovery Channel and so on...

Thanks all!!! I started with a study of real machines like this: This is not a scale model, but the main functions are realized.

8461 - excelent model!!!

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!!!

Thank you! I've added more pictures to the first post.

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!

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...

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!

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 :)