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jobu
08-10-2005, 01:55 PM
I am having a problem overheating with a NippyBlack 2510. Sitting still on bench or flying the red light comes on on the esc (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=2596) and shuts down between 60-70% throttle, almost instantly. It has never made it to full throttle.

It is set up as follows...

Mini Funtana
Nippy 2510
Castle Creations (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=2279) 35 amp esc
Kokam (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=2317) 11.1v 1500mah battery
11X7 apc sf prop

I have changed esc from a Kontronic 35 amp and same prob, both shut down at nearly the same throttle possition. The only thing that does'nt look too neat is the solder job on motor, also the motor leads out are 12awg and the esc leads are 16 awg.
I am assuming that the prop may be too large but thought 11x7 would be fine seeing that it is advertised on Hobby Lobby as a good motor for 3d planes up to 44oz. I will try 10X4.7 tomorrow.

If anyone has any help please let me know.

Thank you,
Joe

William L Baker
08-10-2005, 02:18 PM
could it be that you have too much prop on it and are therefore pulling too many amps ? Try a 10/ or something smaller and see if this helps

Spaceclam
08-10-2005, 08:59 PM
it's your esc's auto cutoff. you are drawing too much from that tiny battery and so the battery's voltage drops a lot, and your esc thinks it's dead, so it shuts of the motor to save the battery from being run down too low. less amps and/or a bigger battery will solve this problem

rcers
08-10-2005, 09:02 PM
less amps and/or a bigger battery will solve this problem

Yep.....

The Kokam 1500's are long known as dogs. They only put out about 8-9 amps before their voltage drops significantly. That is your issue.

Mike

jobu
08-10-2005, 10:25 PM
What do you recomend for a battery size/brand?

I tried 10" prop and was better but still cut out.

There is no way I can switch esc or am I stuck changing batteries.


Thanks for the input
Joe

rcers
08-10-2005, 10:35 PM
What do you recomend for a battery size/brand?


Well HL says 25amps sustained for that motor. So i would go with Tanic 2220's or TP2100's.

Keep it at around 22 amps and you should be fine.

Mike

William L Baker
08-10-2005, 11:31 PM
all of the replies I have read are good suggestions , but it would be so nice instead of shooting in the dark we knew what the current is. Maybe if he doesnt want to spend money for an Astroflight Watt meter he can borrow one ?

jobu
08-11-2005, 05:28 AM
I am reading these posts after a test that I did. I have two 1500's parraleled with a y splitter and it will run full throttle no problem. At this time I can't spend any more money this month. I already have 8 1500 kokams. But soon I will pick up 2 tanics and also consider the watt meter as well. Do you think that this is a decent solution for the time being?

Thanks for all the help, it was much appreciated.

Joe

martyh1104
08-11-2005, 05:39 AM
jobu
I run max-amps li-po's batteries (1650ma) in all of my models and so far they have held up really well. Check them out at maxamps.com. I bought loose cells and built my own but that can be really dangerous if your not sure about what your doing. They do have complete assembled packs and the prices are good. Cells are rated 10-12c. Hopefully this will help.
Marty

William L Baker
08-11-2005, 11:39 AM
I am reading these posts after a test that I did. I have two 1500's parraleled with a y splitter and it will run full throttle no problem. At this time I can't spend any more money this month. I already have 8 1500 kokams. But soon I will pick up 2 tanics and also consider the watt meter as well. Do you think that this is a decent solution for the time being?

Thanks for all the help, it was much appreciated.

Joe
Jobu, you done good. Next time there is a mystery to solve, a meter will help to see into the dark .

rcers
08-11-2005, 02:44 PM
But soon I will pick up 2 tanics

that is the ticket. They are honest 10-12c cells so if you get the 2220's or so you will see the difference!

I love Tanic Packs!

Mike

Matt Kirsch
08-11-2005, 05:19 PM
jobu,

Two Kokam 1500s in parallel is an excellent solution! There's plenty of room in there for the extra pack, and you were probably severely tail heavy anyway...

Before you go spending large amounts of cash on new packs, take a look at weight. Do two Kokam 1500s weigh much more than a 3S ThunderPower 2100 or 3S Tanic 2200? How much more? Is a couple of ounces worth that much $$$?

jobu
08-11-2005, 06:34 PM
I haven't flown the plane yet with the two packs but they fit nicely in the nose. I am assuming that the 3000 mAh capacity should also last longer than the single 1500. plus with the Lipo4 charger I got...waiting for two packs to charge is not an issue.
As far as new packs go ...maybe down the road for now I am contemplating a glow plane too so I need to lay off the electric spending. But I will take your advice (William) and pick up a meter.

Thanks to all...results to follow.
Joe
p.s. does anyone know where to buy loose allen wrenches eg. 3/32" ?
nice site martyh try these guys too cheapbatterypacks.com

Spaceclam
08-11-2005, 07:02 PM
your 1500s will be fine in paralell. if you go glow though make sure to get a good engine or you will hate them for life. i dont mean spend a lot for ys or rossi or something, just ask around first!

jobu
08-15-2005, 03:37 PM
I flew the Mini Funtana yesterday with the double 1500 in it and it worked fine. I flew for about 20 minutes with no problems and it seemed to have alot of juice left in the tank but the rain cut the flight short so not sure of the total duration.

I could deffinately feel the added weight in the nose, hovering was tough it wanted to nose over alot but seemed to have the power to stay up. The wing was set in the aft position and I think when I move it foreward it should help alot.
Joe

jobu
08-16-2005, 05:12 AM
Actually I am still having some problems with the motor cutting out at near full throttle. any new sugestions or do you think that the2200 Tanic or TP 2100 will solve?

Spaceclam
08-16-2005, 05:50 AM
run it without the prop on and see if it still cuts. this will tell you if it is somehow related to the current you are drawing. also if you have a wattmeter, use it.

rcers
08-16-2005, 02:58 PM
Actually I am still having some problems with the motor cutting out at near full throttle. any new sugestions or do you think that the2200 Tanic or TP 2100 will solve?
How many amps are you drawing (watt meter time). Remember that 3s2p pack of Kokams is still only good for 16 amps.......... I bet you are trying to draw 20 or so....

run it without the prop on and see if it still cuts
Not recommended, all that power has to go somewhere, if not turning a prop it heats the motor. Just much better to try a smaller prop.

If you must run it without a prop do it only for a second or two (watch how fast it heats up!).

Mike

jobu
08-17-2005, 05:07 AM
OK, Watt Meter time. Whats a good brand?
Also If I had to guess I am probably pulling over 25 amps with a 10x4.7 prop. I don't think that a smaller prop will cut it especially with the weight of the two batts. I think I am in the neighborhood of about 27+ oz.
So what do you think would be the best choice in batteries. If I go to a 2100-2200 vs two 1500, I am dropping like 3-4 oz. of weight too.

Right now the 10x4.7 is batrely letting it go staight up for a few feet. I am able to get about a 5 second hover before it noses over or cuts out and REALLY noses over. I think I need something with 15-20 constant and bursts to 20-25A?
dumbfounded:confused:
Joe

ps what about apogee 2480 or 2170?

EpoweredRc
08-17-2005, 05:28 AM
get rid of the cheap Kokams and get some good packs.they say 1500 but wont handle that,Even some Thunder power 1320 pro lite or anything bigger would do good for you I would guess.

William L Baker
08-17-2005, 11:57 AM
OK, Watt Meter time. Whats a good brand?
Also If I had to guess I am probably pulling over 25 amps with a 10x4.7 prop. I don't think that a smaller prop will cut it especially with the weight of the two batts. I think I am in the neighborhood of about 27+ oz.
So what do you think would be the best choice in batteries. If I go to a 2100-2200 vs two 1500, I am dropping like 3-4 oz. of weight too.

Right now the 10x4.7 is batrely letting it go staight up for a few feet. I am able to get about a 5 second hover before it noses over or cuts out and REALLY noses over. I think I need something with 15-20 constant and bursts to 20-25A?
dumbfounded:confused:
Joe

ps what about apogee 2480 or 2170?
The only brand I have experience with is the Astroflight Wattmeter. It will read volts, amps, or direct in watts.

William L Baker
08-17-2005, 12:00 PM
I have no experience with Apogee. I have Astroflights Wattmeter, and am happy with it.

olmod
08-18-2005, 10:22 AM
is better than none at all ;) http://www.wattflyer.com/forums/showpost.php?p=1199&postcount=1

Spaceclam
08-18-2005, 04:35 PM
that works.... i guess...

jobu
08-31-2005, 04:53 AM
Update:
I got 2100 3s Thunder Tiger for Nippy and it works very well.
Thanks for all your help.
Also got a Potensky Uzi XXL for a pjs 800 motor and going with 2000 Kokam 3s.
I will let you all know the results...hoping it will have plenty of punch for hovers and harriers. Any comments or similar scenarios welcome.

Thanks again,
Joe