the lightest 4" build 😝
By matthew saigon on Apr 18, 2020
5/19/2020: i finally got a set of gemfan 4024 to try. so far it feels good and you can buy them anywhere. this time i had to lower the throttle idle a bit and also scale down ( not clip ) the throttle to 80% and those two things help with the floaty-ness. also, i had to up P and D a bit too. because these props are a bit heavier. PID is in the picture. PID is ok, flyable but that's all i have for now.
5/4/2020: 16awg wires for powerline ( pigtail and battery leads ) is needed. you would get less voltage sag. to save weight, keep those wires as short as you can and have fun.
5/1/2020: i must say i absolutely love this thing flying in my small yard. it's not fast so don't try to push it or even fly in wide open space. it's very easy to control and quiet. use 2.5mm frame if you crash often and also use beebrain v2 canopy for more protection.
4/25/2020: i've used kk3.8" props before, but my builds were 80g - 100g dry which didn't feel good with those props. but this time, it feels a lot better with those kingkong props and 80g with battery.
about the setup:
--- it's not a powerful 4" setup. for powerful 4" setups you would need a lot bigger motors.
--- it's floaty. feels like very light 2s 1102 3in props setup, but of course, this is 4" so it can cruise faster.
--- it's extremely quiet. when it flies by you it sounds like a fly flying by your ear.
--- at this very light weight and with large props you don't really need tri-blade props. bi-blades are good enough and faster and more efficient.
let's say, you have 1s or 2s 1102 spinning 3" props and you like the setup.
or 1s or 2s 0802 spinning 65mm props and you like it.
and you wish you could blow it up to 4in. BOOM here it is. hahahaha
add newbeedrone canopy for more protection. 2 grams more.
weight: right now it weighs 52 grams without battery. keep the weight as low as possible. 1303 motors don't have enough power to carry weight.
frame: i made it up. i used " Pickle EVO2 nano MK2 : nano HD 3 inch quadcopter frame " 2mm thick and i cut up the bottom. weight 7g-8g. so sorry i don't know where you can find a frame like that. maybe you ask Alexandre Arvinte to make one ?
fc/esc: i use crazybee v3 10a esc with built-in frsky. or you could use eachine novice 3 12a esc with built-in frsky.
camera: one of those whoop camera. weight 1g - 1.8g
vtx: i use tbs pro32 nano vtx. or any nano vtx is fine.
propellers: hq4025, kingkong 3.8" ( i prefer kk3.8" props for this weight and setup, hq4025 feel heavy for 1303 motors )
motors: Amax inno 1303 4800kv
batteries: 2s 450mah - 550mah.
PID is in the picture.
idle throttle: 6.5%
throttle cut: at 70%
I term is a bit high. feed forward is a bit high. so lower them to see if you like it better.
note: this video is with 2s 450mah and kingkong 3.8in props. these props are the lightest 3.8in. narrow blades mean they're better on light setup and fast and efficient.
note: 8 minutes flight time, cruising around my small yard. with 2s 450mah.
just practicing, learning to fly better
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Hello
Is it possible to fly with 2 cells 18650 li-ion
Thank you
Why in your flight controoller section, do you not include the betafpv series motors? Even in 4" with 1507 3600 kv and 1404 at 3800 kv, they still have the JST plug that you can easily plug int the motors.
Yeah I got you. I am blown away how you got over 6 minutes of flight with a 2s 650mah pack. I was going planning to use 4s packs, but now that I watched your video, I am reconsidering the whole thing., Last one I had the emax 1606 3300kv's on a 4 inch and they were to much, By that I mean they killed my batteries esxcessivly. My friend went with the 14xx on his and he gets significantly more flight time, even with me flying it. Without sacrificing a noticable amount of power. I just got the new BETAFPV 20amp AIO in mail, I am excited to build another tooth around that really soon!!!
Nice build, your cam is pointing to the right pretty far
I have been through a similar ordeal (mounting a tiny cam with a setup that requires "alignment" instead of a bracket that I can screw into, knowing it will be "straight"). It turns out, as you have seen, that you can definitly fly it just fine with the cam askiew. I wasn't even sure I should say anything, but yours is reeeeeety far to one side. That being said, your dvr confirms that you CAN def fly this rig as is.
From what i saw in your video, the copter flies great. Its a bit floaty due to the prop inertia but thats not a bad thing considering how minimal the voltage dip is. (Your flights are 4-5 minues right?) The only problem saw as an issue was the battery placement should be faced into the direction of travel. This will reduce drag as well as make it less likely that the battery is damaged in a crash. Beyond that, you've a really slick garden flier!
You NEVA want to throw a battery to save the quad. . silly and dangerious . if the mass of the battery smashes the quad in a crash , the frame is too week. if you throw a battery then you have 2 uncontrolled missiles . my greatest fear is throwing a battery in tall grass . never find either again. as for battery mounting, WHERE EVA IT FITS
We"re talking about a 20-30 gram 2S battery, not the 100 gram (or >) batteries for a 5" or larger Quad. Besides, these small 2S batties run between 5 - 10 $ a pop vs the quad that cost 10-20 times as much. So yeah, if i had to choose between which I'd lose, it would be the battery. Besides, if your flying somewhere and your worried about it becoming a missle / fire hazzard, maybe the location choice wasnt the best idea?
This makes me smile hahaha...surely this is "safe" or atleast safer than 3-4s 3" quads right? its just so light and 2s looks great...like you dont need to go higher in voltage. how is your throttle? is it lacking at the top or bottom? or "equally districuted"?
yes 7 mins with 2s 650mah (43g). but some might prefer 2s 450mah (27g) for lighter weight. but i see many people like 4in 1404 for more efficiency. i already have 1303 motors and i like to do different builds with them. this is not a great awesome setup but more like, there could be someone who finds it interesting :)
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Nice one, looks very fast and agile. I quite like the flight times!