4inch Stick kingkong 3.8" props 3s 1304

By matthew saigon on Sep 02, 2019

1  246  13

just new props to try.
it's not a toothpick or twig or chopstick.
so i'll call it " 4inch Stick " :)

it flies faster than 3s 1304 3" props. but it gives up some control for that speed.
i use 1304 because i have them around.
1404 might be a better choice for these props.

nothing much to say. if you wait a few weeks, there will be more people trying these props out. and we can know more about them.
motors i'm using are KingKong LDARC XT1304-6200KV ( they have weird mounting pattern, so you might not want to use them. )

there is no 4" whoop frame. i just used flexrc slim X 3" frame and stack a body of a frame that can take whoop board, on top of it :)

remember to use 16awg wires for pigtail and battery leads.
weight: 82g dry.
PID is not good but flyable.
Betaflight 4.0.6

Betaflight community presets: 2" - 3" Quad - 11xx-12xx Motors ( just copy and paste those lines in CLI command )

set gyro_lowpass_type = BiQUAD
set dyn_notch_min_hz = 150
set dyn_lpf_gyro_min_hz = 150
set dyn_lpf_gyro_max_hz = 700
set dyn_lpf_dterm_min_hz = 150
set dyn_lpf_dterm_max_hz = 250
set dterm_lowpass_type = BiQUAD
set dterm_lowpass2_hz = 150
set anti_gravity_gain = 6000
set p_pitch = 37
set i_pitch = 85
set d_pitch = 35

set p_roll = 32
set i_roll = 78
set d_roll = 32

set d_min_pitch = 18
set d_min_roll = 16
set d_min_boost_gain = 30
set d_min_advance = 0
set pidsum_limit = 1000 #unleashes PID Sum to be 100% (not restricted to 50% by default)
set iterm_relax_type = GYRO
set iterm_relax_cutoff = 10
set tpa_rate = 40
set tpa_breakpoint = 1600
save

note: i'm using 25mw vtx. so i can't go far or get behind any tree.

9/3/19: so i fly slow to see long the flight is. and i got 8 minutes with 3s 650mah :) sorry my vtx is not good, so i can't go far or get behind any tree.
and the music stop at 6:40. it's hard to find long music in youtube library :)

Photos

Discussion

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Werdna FPV   Sep 03, 2019  
1

Nice build. At the rate things are going we'd probably be seeing 5 inch "toothpicks" by 2019

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Werdna FPV   Sep 07, 2019 
1

Incredible :) I am fully convinced. Long range build will be with 1404 motors on 3S. Thank you for your test data!!

matthew saigon   Sep 07, 2019 

i'm waiting on superman 1404 3850kv motors to do another build. if all go well, i'll have another build to show. i'll let you know. 1304 with these props are good actually. but 1404 might be better. i wouldn't know until i have 1404.

matthew saigon   18 days ago 

i came across this video and remember you asked about it. so search youtube for this video " 16min+ flight time on 3in FPV drone using 1404 3850kv motors ". it looks like a great cruiser.

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