DF 29 M440+ MMM 2200 +6s = ok?

[FastVee]

Hi all, I just tested the boat with 4s pack

http://www.youtube.com/watch?v=Ghf6RVnLvZ8

That was heavy and in front of the motor, so cog was way off.



Tomorrow I could test it on 40C 5000mAh 3S lipos(2x3S)-one pack both sides of the motor= good cog. -so 6S is next.


What do you think, the esc is rated 6s and the 2200kv(rated 60.000rpm) should be ok for this size boat and the X440 is a small prop.

I have x637,640 ,642 ,M445 and S220 props aswell. The s220 on 6s would be to much right

so what would you do and what to expect of it...

[westbeach]

Firstly kill that damn music..lol. A little annoying! She seems to run well, what were the temperature on the motor/esc? You could easily move up to a X/M442 and see how the motor handles the prop. And slowly work up in size. I would definitely try a S215, S220 as well.

[ED66677]

get some 2S instead of one 4S you'll be able to get the COG under 30%, she's going to start flying!

[FastVee]

Firstly that annoying music or no sound -the first minute or so the camera recorded sound but after that it was silent.

Motor was 45 deg.c.

esc about the same, but the fan did kick in .

(no water cooling used! )

On 4s the x640 should work.

But the question is will the 6s kill the boat . -that´s 55k rpm on full packs.

I guess that I will find that out soon...


And the 2S pacs... -I have 2 of 20/30C 5000mAh , so they might not provide the current needed. I dont know.

[ED66677]

2200KV and 6S is more a SAW configuration than anything else!
two 20/30C 5000mAh 2S is not bad Pate... that's what I'm running on my 29" DF copy, but not with 2200KV, I have a 8XL, KV is around 2080 so I can spin a bit bigger prop than you probably can!

[FastVee]

The 6S configuration would be just to see how fast it is......
So naturally I would like to test it.

The 8XL(feigao) and 2200 castle/Neu are so different motors that I cant compare the 2.

I had 8XL on 32 hotr cat on 4s, but this 2200 looooooo-oong can feels much better quality, -runs cool and the sound is... great. -but I cant really say cause I have not had the 8Xl on this hull.

Castle says this combo draws about 4-5KW so I really think the 20c batts are too small.....

[tth]

I wouldnt do the 6s......too risky on that power combo in a mono. Thats just me tho.

[Brushless55]

strang you are running 6s on a 2200 Castle motor and only getting these speeds
there are some DFs of youtube running a 8XL on 4s that look faster..
but the Castle on 4s with a S220 would fly!

[FastVee]

So maybe I should test the s220 and 4s first? -and if that wont move it in with the 6S

So the next test will be with these:

[Rumdog]

I run 2 of those motors in a twin cat. Each on 5s1p and x447 props. They are cool as can be after a 3 minute run. I am by no means condoning 6s, just my findings on 5s. They truly are 4s motors in a boat. Definately are gonna want the water jackets from ose though.

[Rumdog]

I'd stick with 4s and get a x445 prop and water cooling.

[Doug Smock]

[QUOTE=FastVee;187619]

But the question is will the 6s kill the boat .

QUOTE]

No sir, the BOAT will probably be fine, it will stink, but other than that.....

That is a 4s hull and motor. Put a wheel on it and run it someplace where it can breath. Get a M445, you may have to back cut it approx. 1mm.
6s with that motor is hot for even a SAWs setup.

"Learn not to burn" LOL
Have fun and be safe!
Doug

[FastVee]

I just checked and I do have M445(not yet balanced), but what do you guys think of the s220, ok to try? -few second run and temp check.

I will get another esc soon that is better suited for boats, another himodel 200A I guess.

And for the motor I will get the cooling jacket, but dont have one yet. The motor stays cool on x440 atleast. -and I did add cooling to the mount after that run(I know that is not as good like proper cooling jacket ,but it will cool it a bit).


AND THE PROP USED ON THAT VIDEO WAS X440 NOT M440, SORRY !

[FastVee]

Interesting.

Just returned from the sea and here are the results on 4S

S215 63.7 km/h ~39 mp/h

S220 79.7 km/h ~49.5 mp/h

Temps, motor max was 27 C and the esc was 34 C. -only cooling was done using cooled motor mount.. .-and water did cool a bit after the hatch tape ripped off on one side, after that dive on the video. -Glad I had coated the esc and rx with electronic lacker.

Gps off... well it was faster but it went flying and diving

so I guess that the S220 with proper tuning will get this thing going.


and to the video ----> http://forums.offshoreelectrics.com/...159#post188159

[Brushless55]

I knew it!
and your temps are awesome..
could get away with a S225 for even more speed!