1s Toothpick (27.3g) - Exploring the limits of 1s

By alwaysbless on Aug 15, 2019

20  626  6

Wanted to push the limits of 1s by building an ultralight 2.5" micro using the HM EX1102 Motors (13500kv) and 65mm props. This thing only weighs 27.3g total and gets about 5 min of mixed flying with a 1s 450mah battery. My previous 1s tinyshark build for comparisons sake used 2" props, 10000kv motors, weighed over 43grams and flew for about 3min a pack. This thing is insane as far as how agile and efficient it is for a 1s build.

Awesome thread on RCgroups discussing 65mm 1s builds @ https://www.rcgroups.com/forums/showthread.php?3288439-Maximizing-1S-Performance

Photos

Discussion

Sign in to comment

ArcherFPV   13 days ago  

now thats a little 1s monster. i likes

nopa   30 days ago  

Great build but i would like to use 10000kv 1103, it will work or burn Crazybee F4 Pro (mobula7-0803 motors) on 1s with jst connector+65mm 2 blade?

alwaysbless   29 days ago 
1

Yea should defintely work. I have an order in for the 1103 12000kvs imma be trying those out soon myself.

nopa   27 days ago 

Well it works but feels like no power, what are your pids?
Edit:weight is 31g w/o battery so it should be fine. What about throttle limit?

MrElevator   Aug 16, 2019  
1

Great to see someone explore the extremities in the lightweight side, I like the trend of lightweight getting more popular.
What do you think, could you get some more power out of the quad if you changed the stock battery connector to something else?
XT30 for this super lightweight seems extreme as it weighs approx. 1.9 grams(amass). What about 2 pairs of gilded 2mm bullet connectors, they would weigh about 1.1 grams? Though I guess some heatshrink has to be calculated in for these 2mm bullets.

alwaysbless   Aug 16, 2019 
2

I'm not sure how many amps its drawing tbh so I'm not sure of the jst is maxing out but let's say it were and there was some extra current to be had. I would probably change to a micro Dean's connector before xt30 since its lighter and can do up to near 20a which is what the crazybee f3 will max at. I'd also change props to some triblade German 2540s or maybe even try going up to light weight 3" props like hq t3x2.

Guides & Reviews

1 558  2
2 days ago

When the FatShark HDOs hit the market in 2018 the FPV community rejoiced for the new Sony OLED displays. While they lacked further upgrades like an updated DVR and power button they were still a market success. With the 2019 announcement of the Orqa FPV.One the community finally had a potential HDO killer on the horizon. With only weeks before the release of the Orqa FPV.One Skyzone came out of left..

Read more
50 5,635  34
30 days ago

Want to learn how to build an FPV rig? This guide will walk you through your first FPV freestyle build. These parts were hand-picked to balance cost and maximize performance. The TBS Source One is a popular frame for it's low cost, high quality carbon fiber. It's easy to work with and provides more than enough space for your electronics. We've got a 32bit 4-in-1 ESC to bring you the smoothest flights..

Read more