Instructables

Thrust vectoring hovercraft (used in jet fighters)

Featured
Picture of Thrust vectoring hovercraft (used in jet fighters)

This is unique- I use thrust vectoring (used in fighter jets), that I haven't seen in other hovercraft, I also use an air diffuser to help get the hovercraft level, and stable.

This hovercraft works on water, land, and snow. It works best on snow, and land. It works decently on water. The surface (snow or land) should be smooth,for optimal performance. Grass, very rocky areas, and mud is not recommended for flying it.

This instructable is to teach you how to make your own thrust vectoring hovercraft like mine. this can be made in a week, or a weekend if you are a fast builder.

How a hover craft works (opens in new page)

We will start building in the next step.

 
Remove these adsRemove these ads by Signing Up

Step 1: Materials, and plans

Picture of Materials, and plans
IMG_2074.JPG

Materials needed-

  1. Foam. I used dollar tree foam board.
  2. 2 motors. I used brush less motors.
  3. 2 Electronic speed controller for brushless motor, or esc
  4. Suitable batteries, I used 2 lipos, one for each motor.
  5. Servos, I used a cheap 9 gram servo
  6. A radio tx, and rx.
  7. Material for the skirt, I used sturdy cloth, plastic Bags can be used too.
  8. propellers for your motor, a data sheet for your motor usually recommends an appropriate prop.
  9. wood or carbonfiber for re-enforcements.

most of the materials can be found on hobbyking.com

Total cost is less than 100 US$

tools

cutting knife, hot glue gun, soldering iron

hi I'm starting a hovercraft group to share experience and designs to make the best hovercraft s possible I was wondering if you were interested
Saral Tayal (author)  British Badger1 month ago
Sure

Great Ill find some other people then will start

leadzeplin1 month ago

cool

leadzeplin1 month ago

cool

iamtojo9 months ago

I noticed that your hovercraft noses down whenever you turn on the propeller. This is because the force that the propellor makes does not act through the center of mass of your craft. If you aim the propeller so that it points through the center of mass (roughly the center of he platform) it will stop nosing down, which will probably reduce drag and give a better ride overall.

However, if you do this then the craft will "pull up" when you make a turn (the opposite of the nosing down that it currently exhibits). This is because the force will now be acting behind the center of mass. It might actually be beneficial for helping your craft make a turn without the nose sticking and slowing it down.

Saral Tayal (author)  iamtojo9 months ago

Yes, you have a very good point. Actually my lighter battery was charging at the time I filmed this, so I had to put a heavier battery. The lighter battery helps the nose going down. I want to improve the thrust vectors soon, so I will take your suggestion into consideration, Thanks

palombo505010 months ago

I like the videos but noticed the same similar problem I encountered with skirting. It causes drag. The simple one I made has no flexible skirting and seems to give a bit more stability. I used two thrust motors to steer the unit. But... mine is hard to steer because there's no drag from the skirt. However, it allows me to hover over water without flotation devices.

Saral Tayal (author)  palombo505010 months ago

I don't understand how the skirt creates drag, The point of a skirt on a hovercraft is to hold a cushion of air, which removes drag, right?? If you are talking about my first video then see carefully , that the hover motor is off, and I am only using the thrust vectors to show that this is actually thrust vectoring. I like your hovercraft, and the fact that it can go over water, smoothly. The dual propellers is also an easy, and efficient way to steer, and move. If you make a 2nd version, I think it could be more durable and the aesthetics could be nicer, but as a toy, building experience and a proof of concept, it is great as it is.

What I meant by drag is that the skirt drags the terrain because of the flexibility of the fabric. By not having a skirt, I found the cushion of air to be evenly displaced. Also having the weight of the other components centered really helped. Good luck. I do like your project.

Saral Tayal (author)  palombo505010 months ago

Oh I see what you mean, and thank you. One advantage of your design, as you mentioned is smoothness on a level surface, no skirt drag. On a level surface like water, tiles, smooth cement it is better not to have skirt. One advantage of a skirt is it can handle cracks in the ground, or small bumps, like on a road, etc. Depending on your needs, you can put, or exclude a skirt, like your design, Thanks for sharing your design.

Check out my setup.

Sam and I made a hovercraft that skims over water

One more

palombo505010 months ago

I don't see the "thrust vectors". It looks like a standard Application.

Saral Tayal (author)  palombo505010 months ago

I will son upload a video with the thrust vectors, but unlike other rc hovercrafts, this one has no rudders, and the thrust motor moves instead to turn the hovercraft. You can see the thrust motor attached, on a pivot. Instead of redirecting the thrust (air), I redirect the motor creating the thrust, making it more efficient.

Saral Tayal (author)  Saral Tayal10 months ago

I have the videos uploaded, The first video clearly shows that I have no rudders, and I am redirecting thrust via turning the motor, I hope it solves your query.

Saral Tayal (author)  Saral Tayal10 months ago

please ask more questions, I will gladly reply