Micro monkey - 35gram 2s

By QuadifyRC.com on Mar 20, 2018

20  1,054  8

This build orginally started with a larger 2-3s capable 20mm FC and ESC but I've downsized to a 16mm FC and ESC that does 2s only since 3s only really adds weight on this setup.

The frame has been fairly heavily detabbed and lowered and is very tight. Even and XM receiver was too big so I went with a Fullspeed Nano receiver.

Building is not something I want to revisit in a hurry. It's super tight and the motors wires especially are awful to work with. You can see I even had to shorten the esc-fc cable to make things fit. On the plus side it flies very nicely and being so lightweight even the brittle hulkie props last a long time. I can fly it pretty much anywhere since it just looks like a toy. It's fully featured - get full OSD and all the goodies from the latest rounds of betaflight. Batteries are less than $5 each and give me 3-4 minutes of good quality flight.

More of a build discussion and parts choice focusing on the 16mm stack here: http://quadifyrc.weebly.com/reviews/baby-2s-f3-16mm-flytower-heart-of-an-ultralight-micro

Props still aren't quite right, at this weight I probably need a 2 bladed prop to stop it being so floaty and make it a little more responsive. So far some cut down gemfan 3025 props are feeling good but the are ugly!

Update, the Gemfan 3035 4 blades work great with 2 blades cut off at this weight, just make sure you cut the right 2 blades off :) Still running an old micro FLYSKY RX2a pro receiver untill my Fullspeed FRSKY nano arrives which should bring me down to 34.5g

I get about 3 minutes flying on the little 2s 300mah batteries coming down at 3.83V so could probably get 4 minutes safely.

I love the way that this thing flies, and I can fly it almost anywhere. For that reason alone it gets more use than anything else I fly.

Another update: I've switched from the FSRX2a flysky receiver to the full speed RC FSD nano receiver. So small! More details here:

http://quadifyrc.weebly.com/reviews/full-speed-frsky-nano-receiver-the-smallest-and-lightest-frsky-receiver

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Discussion

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Wayno-san   Apr 03, 2019  
1

how are those motors working out for you? people seem to complain that they vibrate a lot. I'm building a GnarlyFPV Primo 110x frame and am looking for a 2-3 s capable motor. Missy options are a gazillion kV unfortunately.

QuadifyRC.com   Apr 04, 2019 
1

Hi there. Surprisingly good, I thought they would have died a long time ago. In terms of performance they are pretty docile but still superior to a 08xx motor. You can't actually get this variant any more. I've got a 080x and 110x primo frame on the way too. Check out the spedix motor, they're meant to be ok otherwise i'd recommend waiting for Bob Roogi's new motor.

Wayno-san   Apr 04, 2019 

Thanks for the reply, love your website BTW. Spedix is on my list but wi/o prop threads on the bell it puts it in the same space as the BetaFTV motors, which are actually cheaper here, I can get in 2 days, and I hear good things about BetaFPV taking care of any issues that might arise - so it would get beat out by that motor, no contest. You mean KabobFPV? LOL, I like that the guy is comparing motors, calling suppliers out on bad quality, etc, but I don't see why people are treating him like he invented this space. It's been here since the advent of the hobby. Also, whatever "his motor" will be I'm sure it will immediately get hit by strong demand, quickly followed by a price increase, so I have no interest in being part of that racket. Let me know what you end up with your Primo. Keep up the great work on your website, I really enjoy reading it.

doc   Mar 20, 2018  
1

Finally! That is a proper 2s build. May have to clone it.

QuadifyRC.com   Mar 20, 2018 

Thanks! The Eyas frame is a sumbitch to build with and I've removed a lot of material so bear that in mind if you are chasing weight. Also has to be drilled for the 16mm stack. Can't think of a 2" alternative that is lighter but if 2.5" I'd take the KT100 with a 3d printed camera mount and run king kong 65mm props. Check out here for more build details and design choices: http://quadifyrc.weebly.com/reviews/baby-2s-f3-16mm-flytower-heart-of-an-ultralight-micro

doc   Mar 20, 2018 
1

I built a eyas 80 for a friend so I know what a beotch it is. Against my advise he wanted Emax 1106's, way too much but that's what he wanted. The way I built the stack it cleared with 2035's but on power it would nick the fc so he went with 1935's. Smaller motors, higher kv and 15-20g weight reduction would make that a fun little quad. The Eyas frames are all good, the 112mm is one my favorites. I am running two of them on 3s, RCX1305 5000kv on 3" but I think this frame would be awesome on the Rotorx 1107 7600's on 2.5 inch props.

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