Nice! Yeah, I’d fly that.

So I found that if you can increase current draw through the motors you can get just that bit more top RPMs.

I did some tests and found some things with the following packs.

• 1S 850mAh Hv GNB (purple series, doubt they are 850mAh)
  
• 1S2P 1200mAh GNB (yellow series, I pulled a pack apart and used two cells)
  
• 1S 1500mAh tattu gen3 (pulled from a 6S pack that had a dead cell)
  

I like to capture the RPMs on the OSD, I like the information it provides.

One thing I noticed was the larger capacity packs resulted in higher max rpms.  Even with the added weight of the 2P and larger 1500mAh packs the props were still able to spin up higher.

I did a test, a punchout sustained for 2-3 seconds so the OSD catches up.

max RPM (approx/visual avg)

1S - 23-24k RPMs
1S2P - 25k RPMs
1500mAh 1S - 25-26k RPMs

Here's a rip with the 1S2P pack, coming in at approx 1200mAh.


This is a new frame, the last one in the build series was a bit fragile and a vtx kiler.  Can't have that.

Dry is 58g, I'll need to add weight with battery later.

Oh yeah, the current sensor is now properly calibrated for this tmotor AIO board.  Everything poster earlier is most likely inflated by 20-30%.

did you allready screwed up the startuppower? that might give a littlebit better rotorresponse and a bot higher topspeed either :-)

Yeah I have done a few things to maximize power over everything else.

• 24khz pwm on the esc
  
• 23deg timing on the esc
  
• bl_32 beta firmware 32.95
  
• demag comp set to low
  
• in betaflight vbat sag is off
  

Rampup power is set to 50% at the moment and that turns the motors very well when arming, almost 10000rpm.  Not sure if I sure change it?

The dragonfly frame ended up being a bit weak on the AIO mounts.  you can see I snapped one here:


If the quad would crash the canopy had a tendency to come down hard on the frame, causing this mount to break.   thise frame didn't have room for the downward facing usb so the vtx was mounted on the bottom of the stack.  not the best idea.  I believe I killed one, maybe two vtxs this way.  hard crash, frame snaps and bottoms out, vtx hits the frame hard and breaks.

So now I'm using the pickle frame I bought, this one has the bloody usb access hole so I can mount the vx on top again, much safer! Trust me!


with the t-motor AIO mounted on the bottom, the vtx and EP2 rx sits on top


I'm sick of killing the vtxs so I focused on making this one as resilient as possible.

The stack is mounted down tight with extra gummy shims in between each stack gummy.  the wide base of the canopy securely holds the vtx antenna in place.  the vtx antenna is flush with the canopy and the rx is plain out of sight.  For the range I fly this, perfect.


Ignore the motor wires, I didn't resolder them since swapping frames.  I could lose a gram or two trimming them up.

This iteration of my favorite toothpick comes in at 58g dry with the biblades.

(15-Mar-2023, 03:59 AM)mstc Wrote: Very nice. I have an analog pick (3S though) and considered swapping in the WS, but heard that the 1S VTX is relatively fragile and was hesitant. I guess 50g is light enough though (although it looks like your 1S pick flies pretty hard). Is the VTX board corners poking out past the frame? Maybe add some TPU bumper, but probably only more visual/dirt protection than impact protection.

How dafq does the 1s board work on a 3s build? VOltage regulator?

The obsession with 1S is real 

When you can't go any higher in voltage, you push current instead.

I went with the highest pitch I have, the emax avan 3" props.  Mad pitch but quite light, a great, aggressive prop.
I went with a homemade 850mAh 1S pack, pulled from 2nd gen tattu 850mAh 4S pack.

I can almost survive a sustained punchout that maxes out at 24A, with an average 15000rpm registered on the props.  This rpm is way less than the 22-24K rpm I'm getting with the biblades but the thrust difference is quite noticeable.

I've turned on thrust linearization to help with the low to mid throttle response, it has made a difference in how the quad responds.  Quite high at 50%.  I dropped the master multiplier to facilitate.

The GNB 850mAh stick battery can't sustain the punch outs like the tattu 850mAh battery can.  

Also due to the current sinking capability of these larger 1S packs, Vcc doesn't bottom out below 3.2V so the walksnail vtx is happy too.

Best performance to date.