Welcome to Multi-Rotor UK. Please login or sign up.

Wednesday,November 27, 2024, 01:43:56

Login with username, password and session length

Shoutbox

Bad Raven:
12 May 2024 08:13:51
 I have some F1 Abusemark boards going spare,,,,,,,,,,,,,    ;)    :azn
DarkButterfly:
11 May 2024 22:12:29
And with oldskool parts  :D
DarkButterfly:
11 May 2024 22:11:57
I must be the only one doing tricopters right now  :laugh:
DarkButterfly:
11 May 2024 22:09:30
 :D
Gaza07:
11 May 2024 21:15:16
Domain has been renewed closure has been cancelled  :D
Gaza07:
02 May 2024 08:07:52
Who are most people ??? I think the person you are referring to has put in a lot of effort to keep things moving  :rolleyes:
hoverfly:
01 May 2024 10:16:12
Most people I have spoken to are pizzed off with the yellow peril  flooding the forum,go figure. :whistling:
Gaza07:
23 Apr 2024 08:09:45
The Domain expires for the forum in 60 days, I'm not going to renew it this time unless I see any activity  :beer2:
Gaza07:
20 Apr 2024 18:02:50
Is there anyone who would like to see this forum stay open ? :shrug:
hoverfly:
17 Apr 2024 17:15:13
 :rolleyes:
Members
Stats
  • Total Posts: 201,498
  • Total Topics: 20,274
  • Online today: 22
  • Online ever: 530
  • (Tuesday,June 26, 2012, 08:34:46 )
Users Online
Users: 0
Guests: 15
Total: 15

Theme Changer





3d - Printworx

Opinions on the Multistar low C batteries

Started by stickboy, Sunday,November 09, 2014, 19:52:16

Previous topic - Next topic

stickboy

I';ve been looking into buying some of these new batteries rated at a 10C constant and 20C max burst from Multistar. Was hesitant at first but after watching their video I think I might be convinced. The guy explains how the math works out to give a constant ~50A draw which is well good enough for anything I fly (740kv and 900kv tigers) and it just makes sense with what I';ve been experiencing. As an engineering student (GO BEAVERS!) I can';t figure out why everybody is putting high amp ESC on motors that only draw 18-22A at full throttle so these batteries just make sense to what I';m experiencing in actual flight.

So what do you think? Anybody flying at these low C already? I';m looking to make an X8 with my mt4008 tigers that';ll fly 30 minutes so I want to make sure I';m not blowing money on these Multistars.

guest325

The answer is quite simple, it';s just maths.
5000 mah batteries @ 10C will give you a max load of 50A; 20C, 100A etc work out what you need PLUS a safety factor of whatever you';re comfortable with (I go for 50%) and there';s your answer.
With regards to the esc';s headroom is not a bad thing,  these esc';s are not always giving out what they are rated at - unless you buy expensive ones like Jeti or Castle creations you can';t be 100% sure that they will do what they say they will!

stickboy

Well I';m using the S25A Tiger ESC so I hope their trustworthy enough. I generally try to stick with everything Tiger from their professional series.

So if I';m drawing 18A at 100% throttle, then the 8000mAh 10C 4 cell should do the trick, right? Sounds like I';m definitely not going to be able to use it for the X8, but thinking I';ll buy two to put in parallel.

guest325

Probably be OK but I would be more inclined to get 20C 8000mAh.

tectic

From the opinions I have read online
I have read they are working fine but due to them being a cheaper battery they are not physically lasting very long
I have read reports about them puffing quite quickly and not regenerating there charge for many cycles
I have one my self but have not actually tried it out yet as I need to swap the battery connector.
650-Hexa-copter, 450-Quad-copter,Xugong 10 Quad-copter