Drones.

Loru

Retired Staff Member
Retired Staff
Addon Developer
Donator
Joined
Sep 30, 2008
Messages
3,731
Reaction score
6
Points
36
Location
Warsaw
Recently I bought simple drone in order to learn to fly however for some time I've been fascinated with high performance racing / acrobatic drones.

This is my current one:
1ccdc2e4ea1c99da615c0ff041c319a3.jpg


While I'm still learning basics of quadcopter flying, I decided to make my own one with custom frame. Here is my WIP paper build which will be updated as I progress with it.

Plywood Wonder Mk1

Feel free to post your drone related stuff here.
 

Fabri91

Donator
Donator
Joined
Jun 2, 2008
Messages
2,148
Reaction score
192
Points
78
Location
Valmorea
Website
www.fabri91.eu
My first excursion with quadcopters is a home-assembled one with 48cm hub-to-hub diameter.

nCSon25.jpg


The idea is to have it become a usable camera platform, with the addition of a gimbal.

Right now, however, the camera is mounted using an advanced velcro system:
Bc3ZWjd.jpg


So far it appears to be working reasonably well, but the addition of a small FPV camera will be done as soon as the parts for it arrive:
 

Artlav

Aperiodic traveller
Addon Developer
Beta Tester
Joined
Jan 7, 2008
Messages
5,612
Reaction score
239
Points
153
Location
Earth
Website
orbides.org
Hm.
Here is me doing some flips on the crashproof quad i printed.
Not the best as video quality goes.

And here is me crashing the old Flying Guillotine, that was supposed to be a camera carrier a decade ago.
Not the best as flying quality goes.

And here is a little single-piece one i printed to try out various stable mode things:
3xHMEDf.jpg


There is a world of a difference between the rate mode and stable mode, on both the controls and code sides.
It seems that for me the success is inversely proportional to quad size. :)
</brag>
 

Fabri91

Donator
Donator
Joined
Jun 2, 2008
Messages
2,148
Reaction score
192
Points
78
Location
Valmorea
Website
www.fabri91.eu
I'd like to try rate mode, but I'll do so only with the FPV system. Too afraid to smash someone's windows otherwise.
 

Urwumpe

Not funny anymore
Addon Developer
Donator
Joined
Feb 6, 2008
Messages
36,871
Reaction score
1,533
Points
203
Location
Langendernbach
I have one now for a year, never managed to fly it... Had no time going to a place with it where I can legally fly with a FPV. And illegally flying is more fun if you have no neighbours around already attempting to sue somebody for using a non-FPV here....
 

Andy44

owner: Oil Creek Astronautix
Addon Developer
Joined
Nov 22, 2007
Messages
7,620
Reaction score
5
Points
113
Location
In the Mid-Atlantic states
I bought a cheap one a year or so ago. I practiced flying it in my living room, hovering over the coffee table. It has a simple camera on it, not very smooth, but it is fun to zoom around in an empty baseball field, as long as the wind isn't too high.
 

zerofay32

Buckeye
Joined
Feb 6, 2008
Messages
470
Reaction score
0
Points
16
Location
Columbus, Ohio
I do commercial flying for an aerial survey company. We use a DJI S900 currently but are looking to upgrade to something that can fly with a dual sensor setup (Camera and Lidar). I have a DJI Phantom 2 that I fly at home for practice. I'm not super into the UAV thing but I took it as an opportunity to keep my job. :lol:
 

Attachments

  • 070115_Flighttest_07.jpg
    070115_Flighttest_07.jpg
    144.2 KB · Views: 16
  • 070115_Flighttest_15.jpg
    070115_Flighttest_15.jpg
    84.3 KB · Views: 16
Last edited:

steph

Well-known member
Joined
Mar 22, 2008
Messages
1,122
Reaction score
494
Points
83
Location
Vendee, France
I have a cheap one, fpv with a range of a few dozens meters, gotten from a toy store. The video feed gets picked up via smartphone. There's an app which lets you control it from the smartphone, but the signal gets choppy after a few meters,so I wouldn't recommend it.

Last year I bought a low-end hexa ,non-fpv but with an onboard camera. It lasted about five flights., after which its controller failed (it constantly acts as if the drone is tilted 90 degrees. (it occured in-flight, I initially thought an engine failed and kept trying to get it to right itself).

One of the more peculiar problems encountered with drones is wind, as Urwumpe said. Despite seeming maneuvrable at close range, they don't have that much forward speed . I nearly lost the hexa once after it started getting carried away by the wind above a certain height.
 

Andy44

owner: Oil Creek Astronautix
Addon Developer
Joined
Nov 22, 2007
Messages
7,620
Reaction score
5
Points
113
Location
In the Mid-Atlantic states
One of the more peculiar problems encountered with drones is wind, as Urwumpe said. Despite seeming maneuvrable at close range, they don't have that much forward speed . I nearly lost the hexa once after it started getting carried away by the wind above a certain height.

Yeah, one of the first things I did when I took it outside was switch on the camera and take it up vertically, but as soon as it was clear of the treetops the wind speed picked up and I nearly lost it. Had to fight it with full stick deflection until it got down low again.
 

Loru

Retired Staff Member
Retired Staff
Addon Developer
Donator
Joined
Sep 30, 2008
Messages
3,731
Reaction score
6
Points
36
Location
Warsaw
I think I have frame design mostly finalized

framedesign_005.png
 

Fabri91

Donator
Donator
Joined
Jun 2, 2008
Messages
2,148
Reaction score
192
Points
78
Location
Valmorea
Website
www.fabri91.eu
I see that your engine mounting holes allow for adjustment. Any reason for that? On my (bought) frame the holes are circular.

65575.jpg


The diameters chosen allow for all or almost all engines to be mounted with 4 screws.

The reason I ask is that it would seem unneccessarily difficult to mount the engines exactly in their position.
 
Last edited:

Loru

Retired Staff Member
Retired Staff
Addon Developer
Donator
Joined
Sep 30, 2008
Messages
3,731
Reaction score
6
Points
36
Location
Warsaw
I'll redo them to 16 and 19mm spacing when my parts arrive. Only then I'll proceed with laser cutting. Also I'll have to make proper mounting for cameras but that too will be after I have parts in my hands.
 

Loru

Retired Staff Member
Retired Staff
Addon Developer
Donator
Joined
Sep 30, 2008
Messages
3,731
Reaction score
6
Points
36
Location
Warsaw
Taking advantage of lack of wind, I've done some flying today. This Syma quad is vastly underpowered for my liking but that was expected for $40. I need to dissasemble it and put all the plastics (body, legs etc) on the scale. Maybe I can do lighter version.
 
Last edited:

Artlav

Aperiodic traveller
Addon Developer
Beta Tester
Joined
Jan 7, 2008
Messages
5,612
Reaction score
239
Points
153
Location
Earth
Website
orbides.org
The model I have is always gyro-stabilized, there is no pure manual mode that I can tell.
Gyro-stabilization is mandatory for it to fly at all.
However, there is another level on top of it - inertial guidance/dead reckoning with accelerometer for keeping the thing upright and be controllable in the offset mode.

The natural way of controlling a quad is stick movement equals rotation rate.
That is, in freefall the drone would have rotated at a fixed speed for every level of stick deflection.

The more advanced way of controlling, normally known as stable mode, is when the drone takes care of it's orientation via dead reckoning and some human-interactive guesswork, and so stick movement equals deflection angle or drift speed.
That is, it would move sideways at speed proportional to the stick deflection.

Piloting vs giving suggestions to autopilot.

In natural mode, you can fight the wind directly, in stable mode you are limited by what software considers safe angles and speeds.

Terminological confusion aside, from what encounters i had with commercial drones they don't seem to offer anything other than stable mode these days, so the point is moot.
 

Loru

Retired Staff Member
Retired Staff
Addon Developer
Donator
Joined
Sep 30, 2008
Messages
3,731
Reaction score
6
Points
36
Location
Warsaw
Ready to laser cut the thing:

lasercutting.png


---------- Post added at 07:44 PM ---------- Previous post was at 05:10 PM ----------

So few minutes with laser cutter and I have this baby:

P_20170708_183643.jpg

P_20170708_184500.jpg

P_20170708_192708.jpg

P_20170708_192849.jpg

P_20170708_192857.jpg


Screwed part of camera mount by 3mm but that'll be fixed tomorrow.
 

Artlav

Aperiodic traveller
Addon Developer
Beta Tester
Joined
Jan 7, 2008
Messages
5,612
Reaction score
239
Points
153
Location
Earth
Website
orbides.org
Sigh. I wish i had a laser cutter...
 

Fabri91

Donator
Donator
Joined
Jun 2, 2008
Messages
2,148
Reaction score
192
Points
78
Location
Valmorea
Website
www.fabri91.eu
And now we're all afraid you'll build an orbital laser cannon controlled by old Soviet valve electronics found by the side of the road. :hide:
 
Top