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crazy ha ha ha. Thanks.

Planetary gear trains are used to reduce the output speed and increase the torque in a compact package. They are used in automatic gearbox of cars, large trucks, as final drive gear train in tracked vehicles like bull dozers, tracked shovels, also used in electric hub motors of e bikes for increasing the drive torque. These are some applications apart from this they are used in many number of industrial machines that need a compact design. Planetary gear trains are compact and smaller in size and weight when compared to compound gear trains of same power level.

Using an hydraulic motor. motor direction is changed using direction control hydraulic valve. Hydraulic motor is driven by pressurized fluid supplied by oil pump attached to the engine.

@@xlmachines120 Thank you for explanation

@@jiriprochazka9254 Welcome.

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Yes absolutely.

Grey colour horizontal shaft is the main output shaft which has splines, brass yellow colour component is dog clutch that engages and disengages the forward and reverse bevel gears. Red, blue and green colour components are bevel gears. Green colour bevel gear is the driving gear which is connected to the engine. Shifting lever slides on the groove of the dog clutch. I don't know what is your application is. But if you want to build one to verify the working mechanism of this gear box then start with small parts. Buy two sets of electric angle grinder bevel gear sets, which you can buy online. These spare bevel gear set costs around 380 rupees. Find a suitable shaft for the gears. Use plywood for supporting structure. Use ball bearings for supporting the gears. You can weld the projections for the dog clutch and file it smooth. Make only two splines on the main shaft and in the dog clutch to simplify the process. Two splines should be opposite to each other on the shaft. Cut matching slot in the dog clutch internally. This will be fun to build.

Thank you.

Welcome. Glad this video had helped you. you can also watch other types of governors in this channel.

Blender 3D. Modelling, animation, rendering and video editing all done using Blender. You can download the software from www.blender.org

The fork is a "C" shaped structure, there is no rod in between the two arms of the fork. The round end of the fork arm just slides in the groove of the sleeve. This is roughly 150 year old mechanism. Watt governor is the first centrifugal governor introduced for automatic speed control of steam engines. You can watch other types of governor animations in my channel to better understand the fork sleeve mechanism. Even in the forks of other types there is no rod passing through the sleeve. Fork pins are short enough to fit inside the groove on the sleeve on both sides.

To better understand fork sleeve connection and sliding operation watch this video czcams.com/video/zbM7wTnLgIE/video.html The shifting lever mechanism in the given gear box video and the fork sleeve mechanism are similar in construction and operation.

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Glad you enjoyed!

Here's that variation: _Contra Rotating Propellers using Five Helical Gears_ czcams.com/video/n2DI_nnJCks/video.html

There are many possible configurations to achieve contra rotating systems. You can see other contra rotating propeller designs here Rolls Royce Griffon gear box model Five Helical Gear Contra Propeller 5 Blade - 3D Animation czcams.com/video/n2DI_nnJCks/video.html Six Helical Gear Contra Propeller 3 Blade - 3D Animation czcams.com/video/Ae7DLLbKSoU/video.html Bevel Gear Contra Rotating Propeller 2 Blade - 3D Animation czcams.com/video/d3b_WJD_Bvs/video.html

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Thank you! Cheers!

Flat 6 Cylinder layout is same as the V6 layout. Only difference is 90 deg V is made to be 180 deg V which becomes a flat layout. This video is for V layouts from V2 to V8. You can watch other six cylinder layouts video in this channel. Link is czcams.com/video/RDOJijSiIvg/video.html Its unfortunate that I forget to include that flat 6 one.

Thank you.

Ayoo

I don't have one now. I will upload it later. It takes lot of time so turn on notification to watch it when uploaded. You can watch contra rotating propeller video in this channel. Link is czcams.com/video/d3b_WJD_Bvs/video.html

Propeller rotation direction depends on direction of rotation of input shaft. This is a simplified demo for contra rotating propeller using a bevel gear box. Based on engine rotation direction the pitch angle of the props will be determined for pusher or puller configuration. For Helicopters the lift will be always upwards (air will be pushed always downwards) and the engine will be turning in the appropriate direction with respect to the pitch angle. For example most of American helicopters with single prop will turn in counter clockwise direction, so engine will be spinning appropriately with respect to blade pitch angle. But for Russian helicopters it will be turning clockwise direction. So to get the required thrust that is lift, pitch angle will be set in such a way. These are fixed design parameters and they don't change for their entire lifetime. Prop pitch angle and engine direction of rotation which is the input determines whether the prop will be pusher or puller. These parameters can be set to our wish during the design stage itself. Here in this video no engine is attached, so input shaft direction can be set to CW or CCW.

Yeah the US be capping on this one

Most of the contra rotating propeller designs are of puller configuration due to increased efficiency. Pusher propellers are popular with single prop designs.

Yes you are correct. To avoid such situation, pitch angle also called as blade angle of the two propeller set is made to be opposite to each other, which means if blade of propeller 1 is sloping down towards right side then the blade of propeller 2 will be sloping towards left side. This arrangement can also be in vice versa. This kind of blade arrangement now forces the air stream towards only one side even though the propellers are spinning in opposite directions. The side at which air flows is dependent on direction of rotation of the input shaft. There are propeller designs in which we can vary the pitch angle of the propeller blade dynamically that is even while the props are in rotation and they are called as variable pitch propellers. Pitch can be controlled to generate thrust either in forward or in backward direction. When air is forced to flow on front side of aircraft reverse thrust is generated. Backward or reverse thrust is helpful in slowing down the aircraft after touchdown while landing. When air is forced to flow on back side of aircraft forward thrust is generated. Forward thrust is the thrust that propels the aircraft. When pitch angle is set at feathering position it wont generate thrust and aircraft will not move considerably. This is helpful while starting the engine in order to reach the required engine RPM without generating thrust.

Gear 2 has a hollow short shaft through which the red colour input shaft passes through and rotates freely. This short hollow shaft is placed in the front bearing that is fixed in the Gear cage. So the Gear 2 is getting placed in the front bearing just like an ordinary bearing and shaft assembly. Now Gear 2 rotates freely with its bearing. Input shaft simply passes through the hole at the centre of Gear 2 and its hollow short shaft.

Thank you very much for your reply. Great demo!

Thank You. You can also watch other useful videos of various mechanisms in this channel in 3D and 2D.