I can absolutely rip this, but I don't seem to have the same amount of fun with my OMP M2, is it a physiological thing?

Picked up a Goosky S1.

I had to get the OMP M2 a friend 😁

Everything feels tight and there's loctite where it should be 🤣
It is flying smooth, no vibrations just needs a recalibration on the FBL gyro for the self level or rescue mode will be more like panic mode 😃

The inevitable happened, major vibration and I had to dump it safely. Looks like I'm shopping for spare parts 🤣

Full flip and didn't crash 😃

Performance seems to be good, could go higher, I do have a longer mast, trying to keep it low key.

Photo taken after the maiden flight, all good 😃

Bought one to see if it's any good, gave it to my daughter to get her started. 😃

It's not even that high up or outside and I'm getting into the wider mesh.

Over 60 discoveries after one evening.

Even bought a 4in1 module so I can use my proper radio 😁

Printed in PETG, it is based on the BetaFPV O4 75mm whoop.

A sub micro 1.7g servo drives the tail vane.

I redesigned my tiny tricopter to use a vane for yaw control, it's kinder to the servo and protects the small motor wires on the tail.
The vane has a lot of authority, at this scale it works very well, I've also inverted the tail motor to a pusher prop.

Tree'd it with no damage 😁😁

But it does rip, just need to tweak the rates so it will flip and roll. Another hour on the printer. 😁

Why I built this

I always wanted a bespoke tiny tricopter, I knew it could be done, even though tri's are now old hat, they're still supported in BF, so I thought, "how hard can it be?"
The answer is not very hard if you don't mind a little bit of micro soldering and some tinkering with tuning the tail.

So I put my mind's eye to use, come up with a design in my head and transferred it to Fusion 360 CAD software.

I already knew it would work, as I had converted my old Mobula6 into a tricopter with hot glue and a servo, just wanted something a little more purpose built and not janky with hot glue and cable ties.

To complete this build you will need

• 3x BetaFPV 11012 motors
• 3x 45mm props
• 1x sub micro servo digital
• BetaFPV Matrix 3in1 Flight Controller
• DJI O4 Air Unit Lite
• BetaFPV Meteor75 Pro Canopy
• 4x M2x12 bolts
• 1x M2x8 for the front of the FC/O4 stack
• JST-PH extension lead, male and female needed to extend the motor wires for the tail
• JST-PH cable for the servo.
• Super glue, gel type preferable

 

Prepare the Flight controller (continue at your own risk, if you're not comfortable with micro soldering, don't do it, or find a friend who is.)

To make the servo operate, a connection to the flight controller must be made, see picture 2 to see which pads the servo leads need to be soldered to.

Use the female JST PH extension cable and solder it to the points shown in the picture.

 

Assembly

1. Start by installing the battery stay, this part needs to be glued on, it fits into the cutouts on the top of the frame deck, If you don't do this first, you won't be able to install it after fitting the FC O4 stack. Tip… Install a battery into the mount to hold it in place whilst the glue dries.  
2. Install the servo next, it needs to sit with the cables facing to the right, looking at it with the tail facing you, be sure to centre the servo with a servo tester, install the horn with the single arm, it should be pointing up, test fit the tilt, and cut the servo horn flush with the top of it, remove the tilt.  
3. Plug the front motors into the FC, see picture 3, the right motor plugs into ESC 2, the left motor plugs into ESC 4, orientation is tail facing you, plug the motor extension cable into ESC 1  
4. Plug the O4 air unit into the FC and mount the camera into the canopy, if you're transplanting the assembly from another drone, skip this step.  
5. Use the short M2x8 bolt on the front mounting hole, then use the other 3 M2X12 bolts on the remaining mounting holes, the bolts must not protrude below the frame, especially the front and rear mount holes, as the battery sits there and it will puncture it.  
6. Use the short screws that come with your motors, fix the motors to the frame, ensure the wires go inward toward the openings for the ESC JST connections.  
7. Fix the tail motor to the tilt, using the short screws, the wires must face the servo.  
8. Install the tilt using the remaining M2x12 bolt, see picture 4, align the front of the tilt with the servo horn, it should just slot in from above, it's fiddly.  
9. Plug the tail motor into the extension from the ESC, (do not plug the motor into the servo JST or you will get smoke from the motor)

 

Set up Betaflight

1. First you need to set the Motor layout to tricopter.
2. Now the resources need to be remapped, MOTOR 4 needs to be MOTOR 3   Enter CLI in BF type  resource MOTOR 4
3. none resource MOTOR 3
4. none resource MOTOR 3 C13
5. resource SERVO 1 B02
6. save

 

Install the props

M2 CCW  M3 CW

M1 CCW

The tail can be finicky to tune, but that's what makes it fun 😃