AOS 3.5- Sub 250g ripper

By CloslaRoche on Oct 14, 2021

14 1,506 11

Disc loading is a weird thing. On one end, you have incredibly floaty quads with zero fling and instant response. On the other, you have really really heavy flying cannonballs that fling for miles from one throttle blip. By the math, 3.5" Has about the same disc loading as lighter 5" quads.

And I have to say, this is probably the best flying quad I have built. Its incredibly responsive, it has some fling but it has enough grip in the air to do complex moves very close to objects without washing out or drifting. The 16mm motors from Bob Roogi/ FPVCycle are perfect for swinging a 3.5" prop and are lighter than I expected.

Photos

Part List

Frame	AOS 3.5 v1 (9 builds) Cncdrones.com	$49.00
Flight Controller	iFlight Beast F7 V2 55A AIO Flight Controller Board FPV F7 AIO Board 25.5x25.5 Mounting for Cinewhoop Quadcopter Drone like Prot (13 builds) Amazon.com	$95.00
Motors	4 x FPVCycle 16mm Motor - 4100Kv (9 builds) Fpvcycle.com	$71.96
Propellers	2Pairs Gemfan Hurricane 3520 3-Blade 3.5 Inch Propeller 1.5mm Mounting Hole for FPV Racing RC Drone (3 builds) Banggood.com	$4.99
FPV Camera	Foxeer Toothless 2 Nano 1200TVL CMOS 4:3/16:9 PAL/NTSC FPV Camera (1.8mm) - Choose Your Color (17 builds) Racedayquads.com	$29.90
FPV Transmitter	RUSHFPV Tank Mini 20x20 25-800mW 5.8GHz VTX - MMCX (91 builds) Racedayquads.com	$39.99
Antenna	2pcs Foxeer Lollipop 85.5mm 5.8G 2.3dBi RHCP UFL Super Mini FPV Antenna Red/Black For RC Drone (106 builds) Banggood.com	$19.99
Receiver	HappyModel 2.4GHz EP1 RX ELRS Receiver (105 builds) Racedayquads.com	$13.49
Batteries	GNB 550mAh 90C/180C 1S-6S LiPo Battery (14 builds) Fpvcycle.com	$15.99

Show stores (5)

Like Copy Part List Follow CloslaRoche

Discussion

Orka Mar 20, 2022

Beautiful build!
What seems to be the max flight time, when cruising?
I already have a TP3 and recently built my first full size quad, the AOS 5.5 of which i will also post here.

Cheers from Germany

CloslaRoche Mar 20, 2022

I don't know to be honest, never did a real "cruising" flight. However I used it as a cinewhoop recently and on the GNB 500s I could do a solid 8min of following/ orbiting flight.

Stevie Feb 06, 2022

Very cool! I have an AOS 3.5 on order and already have the FPVCycle 16mm motors. I wasnt sure I would use ghem in the AOS frame but after reading your comments, its for certain! ill probably use a Flywoo F7 EVO AIO that I have but might also use a Radix. Ill have it finished the day the frame arrives and really looking forward to it now!

nouxtywe Feb 03, 2022

I have posted my build which points to yours by the way.
Thanks again!
https://rotorbuilds.com/build/28928

nouxtywe Dec 23, 2021

Hi there! Thank you for the inspiration :)
I would like to build the same, but with DJI nebula pro nano.
Do you know how these motors (including prop and nut) compare in terms of weight versus TOKA 1505 for instance?
I am really hesitating between those 2 motors, but I really would like to keep the dry weight below 174g to run it with R-Line 750mAh

Show 1 more comment

nouxtywe Dec 23, 2021

I know, the kit comes with a small adaptator, the quality between the nano and the pro are very similar.
Thank you very very much for the rapid feedback. I know the fpv cycle are 3mm shaft so you can't use the Avant 3.5 prop "out of the box" but may consider drill the middle hole to make it work... thanks again, FPV cycle is a go :)

CloslaRoche Dec 26, 2021

Can't drill the center hole of the t-mount prop.

But, the 3.5" Avan props suck. Gemfan is better and has a 5mm hole so you can use the thread adapter the motors come with.

nouxtywe Jan 03, 2022

Well yes you can drill the center of a t-mount prop... others have done it (check out the FPVCycle 16mm webpage to see so :)
Should have my build done by end of month!!

Mr_Stripes Oct 14, 2021

How does it fly compared to a standard 5 inch? Vs a tp3?

CloslaRoche Oct 14, 2021

Honestly I'd say its everything you love from a 5" and everything you love from a TP3 in one quad. It has just enough fling for some larger moves, but it has a ton of grip and agility like a toothpick or other micro.

Guides & Reviews

109 22,060 39

Build a 5" Long Range Drone - Transformer Ultralight

Jun 21, 2021

AirbladeUAV has done it again and this time they've brought long range to the 5" class! Based on the popular Transformer Mini, the new Transformer 5" Ultralight adopts a lot of the same design philosophies with larger props and more payload capacity. It can fly upwards of 20 minutes on a 4 cell Li-Ion battery pack and in ideal conditions it's got a range of over 4 to 5 miles. In this guide I'll walk..

67 17,609 64

Build a DJI FPV Cinewhoop - QAV-CINE Freybott Edition

Mar 04, 2021

With the release of the DJI FPV Drone cinematic FPV has become a lot more accessible, but you certainly don't want to crash a $750 drone! The QAV-CINE Freybott is a compact, lightweight cinematic FPV drone that can take a hit and keep going. It's a lot safer to fly indoors and around people. With a naked GoPro or the SMO 4k you can capture some great stabilized footage. In this guide I'll show you..

Guides and Reviews