Good after noon all respected modelers.. one of the ever discussed topic about a model may be the submarine and hover crafts.. and we can see ample of discussions on scratch built hover crafts like essays.. ample of ideas and opinions..  if we looks around us we will simply find the needed materials around us.. and by understanding the principles of a hover craft we will realize its nothing.. but i never tell you all easy as workmanship and way of thinking plays an important role in model making.. say frankly i am not much interested in hover crafts and helicopters.. but as a modeler it is not good to stay away from any model..and this simple hover craft is designed and developed for my Science Park, as part of the tech display.. about how an hover craft works.. so, this one is not the first one, for them, and is not my first one.. but as a commissioned job, it is not possible to add here all but i got a permission to publish about this little craft.. the first one is 2.5 feet long and it was completed with heavy fans.. but the second one is 2 feet long, and powered by simple and light stuffs.. as you can see it is so humble and simple..

about the first big one.. adding the base here so many beginners can under stand how easy it all...this one is big and powered with powerful motors..

so, from here we are entering to the simplest craft.. the entire craft is made of 5 mm foam board.. the conda ducts were placed with 3 mm foam boards.. one of the main mechanical perfection lays in it's thrust propulsion fans..so at first i tried with small fan achieved from a robotic kit.. and here i am showing you that it how easy to integrate a brushed and brushless motor on a same receiver..
the duct ring is made of paper..

and see here the simple attachment.. the twin rudder panel is controlled by a micro servo, and integration of links were realized by two spare servo horns..

the body.. the instruction from the Principal Sir, of Science Park, to me is that, " it must be basic and crudely built", as they want to show how things works.. so here a straight forward method of construction is utilized.. the lift chamber is basic as the students can see all inside..
the lift fan is comparatively huge to it's hull size.. this gives us a great power to weight ratio without disturbing and straining the motor much..
one of the great discussions took upon the skirt materials.. we need nothing as expensive.. see here..

Excited..

the simple installations of propulsion motor assy..
and after some test drives i found the thrust generated by the little fan is too low.. motor was under strain.. so i reworked on the propulsion system with a 4 inch aero prop.. a total rework..

the previous thrust assy in detail.. can see how easy to make a thrust variator..

Dharmik.. hold it..

now the reworked prop system in detail.. all simple..
the panel is controlled by a simple micro servo..

 the craft is so stable..

because of the gyroscopic stability, you can operate her from a bed or from a desk.. this synchronization allows us a great braking, and turning from axis in 360 degree..  and action time..

she is so fast.. so its too hard to operate with one hand.. but still adding a simple video, that i shot with some hard work.. and for her no matter as sand, gravel, water, tarmac..

how much money that we can spend on an hover craft..?  here i spend nothing than for the material as foam board.. and about Rs 20/- for skirt.. including stitching.. see the simple action here.. will add more long time various terrain videos once i get some of my friends with me...

all respected Friends of modeling.. here we saw the integration of brushed and brushless motors on a same receiver..and a same battery.. along with a simple gyro.. and once we understands the basics we can navigate through any modeling.. from here you can see the making an hover craft is simplified.. a simple lift fan.. a simple propulsion fan.. the craft is ready..

 

here i used a very high RPM motor for lift fan.. and a simple reworked brushed motor for propulsion fan.. the total time of running with a 2200 mA/H battery is about 30 minutes, in optimum speed and 20 minutes at good speed levels.. so, from here i realizes that i need one hover craft in my personal collection.. so i am in my work shop to make a good hover craft with high end finishing.. but still that one will not be a copy of any known craft..  

thank you Sumit.. and still working on it for even more performance..

hello sir,
            im also building a hovercraft.sir actually i have three motors with me first one is the one which is blue in colour ,the same which i sent it to u ,second one is emax 2822 and finally i have turnigy 850kv motor.i cant decide which motor to use for lift and propulsion.http://www.aeroworks.co.in/motor_1312.html
i have the motor mentioned in the above link also,please guide me.sir i plannig yo use 4mm coro to bulit the craft.which is better either coro or foam board??

and all respected modelers..here i am thanking a million times to Flysky and Hobby King, for bringing us the great radio sets are value for money and those helping me a lots in my modeling projects.. how nice and perfect it all.. and from here it is clear that we do not need a complex computer controlled radio set to operate a complicated craft.. mostly i use a basic 4 channel radio with servo reverse switch in panel.. great options for customization.. nice units.. 

Jeevan, please do not spend your time while looking in to the specs of motors.. instead, please come in to reality that a big prop with a low RPM motor, means more counter torque... so your craft will start to behave erratically when the lift fan is activated.. instead go for a high RPM motor with a small dia prop will eliminate the torque effects a lots.. a 4 inch simple two or three blade prop along with a 2600 RPM type ECM will help you lots.. use a conda vanes in opposite to your motor thrust direction.. or simply can make a hole at the opposite side of your craft to the thrust.. this hole can be controlled by a micro servo as open and closed... so this will stay as stable as a rock.. nothing is tough.. have a nice machine..

thank you sir!!!!!
really u r a real craftsman!!!!

Great build and great work sir.

Quote from: roopeshkrishna on September 20, 2012, 12:31:21 PM
one of the ever discussed topic about a model may be the submarine and hover crafts.. and we can see ample of discussions on scratch built hover crafts like essays.. ample of ideas and opinions.. but no any good practical crafts..

Indeed a nice build roopesh Sir...
Your work has been an inspiration for us...

In the quest of making a hovercraft I have come across many other fantastic builds too which also conquered with flying colours on RCI...

I want to ask you sir, are you trying to say that those are not practical and their work is not useful...?

Thankyou..

thank you all..
Adi.. here my work is so humble.. and i was taking lots of inspiration from the all above works.. and to me one of the greatest guru of hover craft to us all the respected senior VC Sir.. when i looks in to his postings and dedication, i always inspired a lots.. nothing can match the dedication that all seniors putting in the modeling.. and my works are no match for the comparison with those works..   and a million thanks for the guidance of the words that i accidently typed there..

I too was a little surprised after reading that comment. I am no Hovercraft Guru. There are kids who are less than half my age who have successfully crafted RC Hovercraft and operated them at competitions much before I started building my first craft. It is they who have inspired me. If they didn't prove that it could be done, I wouldn't have dared do it. To them -