I kinda wanted a Cinewhoop, and kinda wanted to play with Emuflight.  Already had a Runcam 5 and a lotta parts, so after looking at a few "cinewhoop"-type frames, I came across this one while checking out the Squirt (granddaddy of cinewhoops). Shendrones Nutmeg: http://www.shendrones.com/nutmeg

The main parts I had on hand seemed to be about right, so I ordered the Nutmeg frame, a Whitenoise board, some props, and a camera mount.

Parts list:
Shendrones Nutmeg frame 
Aikon AK32 Flytower Mini (F405 FC w/35A Blheli_32 Esc)
TBS Unify Pro32 Nano VTX
TBS Crossfire Nano RX
WhitenoiseFPV nano/nano mounting board
Lumenier AXII Micro U.Fl antenna
BrotherHobby Tornado T1 1407-3600Kv motors
Strix Talon Props -5x4.2x3 (cut down to 2")
Runcam Swift Mini FPV camera
Runcam 5 HD camera
Brain3D Session Armor
StanFPV Universal camera mount (couch)
Tattu 4s Lipos - 650mAh


The carbon plate of the Nutmeg has 20x20 m3 mounting holes for a single stack rotated at 45 degrees.  This made for some interesting wiring for motors and battery lead.


I decided to wire the Swift Mini directly to the FC (instead of the Whitenoise board) to take advantage of battery voltage. (The Aikon FC has a camera control pad, so I wired for that as well.)


Next, I soldered the Unify nano and the CRSF nano to the Whitenoise board.


Then I made the necessary connections from the Whitenoise board to the FC.



Next, I assembled the stack, attached the antennas, and mounted the camera.  (The Swift Mini is a little large for this frame, but it is what I had.)


At this point, I did a smoke test, installed and configured Emuflight, checked the motors, bound the Rx, etc. etc.  The USB port is at 45 degrees, so I have to remove a motor to access it. (A right-angle cable is on the way...)  I also did a test fit of the Nutmeg's TPU body to determine where to route and secure wires and antennas.


Next, I had to cut some Props.  I tried my dremel router table with an old frame (and motor) clamped down, but that didn't work.  I finally made a jig for my dremel using some OpenBuilds T-slot and parts I had laying around.  It worked perfectly!



Now, I still had to mount the Runcam 5.  The Nutmeg has 3 holes int the top center of the TPU for attaching an included Hero 7 mount, but I needed to attach the StanFPV mount (10 degree angle) to strap the Brain3D armor to.  (TPU isn't very easy to drill into - but I finally got it.)


AUW, ready to fly, my Nutmeg weighs in at about 339 grams - probably a little heavy, but less than a 5s reference build I was looking at that carried a Hero 7.


I have performed a maiden hover/LOS test.  It takes about 60 percent throttle to get off the ground.  It turns out it was much quieter than I would have thought.  I did have it drop down at one point, so I've got to figure out what that was.  (I also haven't tested it under goggles yet, so maybe the OSD will give me some clues. Motors weren't hot.)  I did shoot some video of that flight, and I will get it posted when I have time.  The StanFPV mount did keep all quad parts out of the view, but I might have some "jello" issues to deal with as well.

More to come...

Bit of an update.  Tested the FPV cam yesterday under goggles (on the bench) and got a "Core Temp 71" warning on the OSD.  So that probably answers the question about the "drop from the sky" behavior on the maiden.  I took it out again for a full battery LOS and kept it moving through the air with no problems.

The stack is pretty much completely enclosed in the Nutmeg.  The only airflow is from front-to-back through the ducts (side ones are completely blocked with standoffs and plastic).  So unless I can come up with some settings to lower the core temp, I'm gonna have to keep moving, which could be an issue for a cinewhoop.  It's meant to do nice, smooth photography - hovering and even flying sideways sometimes.  (Or maybe I can wire a small 5V fan to the LED pads... )

BTW, the wind really affects how this thing flies...

I Wonder what would happen if you were to drill a hole or some holes through the ducts the allow airflow to escape to the flight controller, Just a Thought.
Col

i would vote for a single small drillhole per duct, just some more flow while fly.

a flybuddy flashed bf4,2 on his 2,5“ cinewhoop, settup the tuning preset for cinewhoops. he got very well results. i didnt but i will try bf 4,2 soon. its the „experimental“ bf4.2 version.
all the bf 4.1 settups and tunes i did

I might try a few holes in the ducts, guys. There are already some openings at the bottom of the ducts to allow motor wires through. I might try enlarging those. I have a feeling that I can change a few settings in Emuflight to help some too. I let you know how I get along.

in betaflight the cli command „tasks“ show some chip/gyro usage