First build... Need Assistance

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twenglish1

Member
Recently completed my first quad build and well I can't get it off the ground! Reptile 500 frame, simonk 30amp esc's, sunny sky 2212 980kv motors, 1045 props, so racing f3 evo flight controller and an 1800mah 3s lipo, specifies it's rated for 35c discharge, any obvious issues right away? I feel like I undersized the motors for only using a 3s battery, wanted to see what you guys thought before I order parts

Thanks in advance
 
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twenglish1

Member
How do I post a link? It wont let me, used the reptile/alien 500 frame from eBay, someone said it weighs 580g? I can weigh my completed drone

And nope it won't fly, bounces around and slides on the ground a little at full throttle, also kinda seems like the motors never reach full rpm, battery issue maybe?, I can tell the motors run much faster when I use clean flight and only run one at a time vs all four, almost like they are bogging down?
 
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twenglish1

Member
Yes I have, also calibrated the throttle range on the four escs, if I use clean flight and run one motor it seems to reach full throttle, but when I have one at full and turn another one up fully they definitely both slow down, seems like something is causing excess voltage drop?
 
Jackson

Jackson

USA member at large
twenglish1 said:
battery issue maybe?
Click to expand...
Meter the battery right off the charger, is it 12+V ?

Looking at the specs of your motors and battery it should fly well.

twenglish1 said:
I can tell the motors run much faster when I use clean flight and only run one at a time vs all four, almost like they are bogging down?
Click to expand...
Are you saying while in CF, tweaking the sliders you see the 1 vs. 4 difference?
 
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twenglish1

Member
Will check battery voltage after a full charge, and yes when one motor running at full throttle is alot faster than when I have 2+ motors running at full throttle, this test was done using the clean flight motor test sliders
 
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twenglish1

Member
Update: problem solved, the battery was faulty, I made an adapter for to connect a lithium car jump starter to the drone, strapped it to the bottom and it flew perfectly, pretty unstable though, probably because the lithium jump started was probably 3 times heavier than the lipo, but I probably just need to do some tweaking once I get a new battery
 
QuadKid

QuadKid

Noth'in Like a Flat Top
When you say "Lithium Car Jump Battery" are you talking about something like the MiniMax? I have always wondered if it would power a quad as it is 12vdc, just thought the amp's it puts out would be too much for the FC.
 
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twenglish1

Member
Yeah that's just like what I used, mine already uses a commonly available RC connector so I just made an adapter to plug it into my drone, and that shouldn't be an issue, that rating is the available current, connecting something to it will only draw the amount of current it needs
 
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