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Electric Stunt => Gettin all AMP'ed up! => Topic started by: Fred Quedenfeld jr on June 14, 2020, 04:01:02 PM

Title: which way to go
Post by: Fred Quedenfeld jr on June 14, 2020, 04:01:02 PM

I am running a turnigy D3536/9  910 KV
34 ounce Plane    460 sq in    10 x 5.5 prop
59ft .012 wires   5.1 sec lap time
Zippy 2200  4s   25c battery
40A esc    Huban timer with the adjustable pot
This is the best plane I have ever put  together and flown
I can only get  4-1/2 minutes   the battery takes 1790  after 4-1/2 min.
If I turn the timer for 5  it slows down at the end and barely stays in the air
motor only has a dozen runs on it  2 batteries are brand new
Should I get a 860 KV  motor   or a 1040 KV motor
thanks  fred Q

Title: Re: which way to go
Post by: Tim Wescott on June 14, 2020, 04:36:33 PM

Higher Kv = higher speed for the same voltage.  So -- Kv = 1040.

1790mAh is 81% of 2200mAh, and cheap Chinese batteries aren't noted for meeting their full ratings reliably -- you may find (after you go to that 1040Kv motor) that you need more battery capacity.

Are you using the ESC in governing ("helicopter") mode?

Title: Re: which way to go
Post by: Crist Rigotti on June 14, 2020, 08:19:42 PM

What RPM are you using?

Title: Re: which way to go
Post by: TDM on June 14, 2020, 08:46:51 PM

Up


https://hobbyking.com/en_us/turnigy-aerodrive-sk3-3542-800kv-brushless-outrunner-motor-1.html?queryID=bf33f4666bb9abec4e0a6749c041de63&objectID=47287&indexName=hbk_live_magento_en_us_products

Title: Re: which way to go
Post by: Dennis Toth on June 19, 2020, 06:27:51 PM

Fred,
For this size ship you can drop to a 9x6 prop, this will drop your amp draw. For me I would aim for a 4.95 lap time. Also check that your ESC is set for at least the same or high rpm then you have the timer set for.

Best,  DennisT

Title: Re: which way to go
Post by: Ken Culbertson on June 19, 2020, 11:45:46 PM

i used the zippy 2200 4s on a 52oz ship with a Cobra 2820/12.  I was able to get through the pattern in good air but it was borderline.  The Turnegy 2800 is a better battery and is not much bigger/heavier.  I was able to successfully use the Zippy 2700. I am not too familiar with your motor but the numbers imply that it is likely more comfortable with a 5s.  I have used the Zippy 3000 5s on a 3520 pulling a 65oz ship with no issues.

I just don't see you being happy with a 2200 on a 35xx motor.

Ken