Proboat Blackjack 29" V3 - new hull, 2000kv motor, 120A ESC & EC5 plugs.

[Nigelpugh7]

I have not worked out what it is for on mine yet either. However mine did have an issue where the tranny became unbound, so I had to rebind it,,and it seemed fine!

One more thing I noticed though, was it was getting very hot on th esc yesterday after some long full speed runs, and there was a red flashing light on the esc when coming back to shore. Is this an over temp warning I wonder?

[Nigelpugh7]

Here's a video of some of the runs yesterday too.

[Nigelpugh7]

Hi mate!

So that's at least two Pistonheaders on here now!

These lipos might be worth a shot. http://www.hobbyking.co.uk/hobbyking...dProduct=31929

They're cheap as chips and wired in parallel will provide 6600mah capacity. I've measured inside the boat and there is loads of room for them. 5s packs look to be about the size limit in the sponsons.

Sorry buddy, missed your message!

Yep seems quite a few of the PH crew are here now, as they took advantage of the good price on the blackjack.

Have you tried those batteries yet? They seem too cheap to be true!

[iop65]

about 25 sec : full throttle ? and wawawawawawaw......

tried to get it out?

high temps esc : seems like you were running it most off the time partial throttle

[Nigelpugh7]

about 25 sec : full throttle ? and wawawawawawaw......

tried to get it out?

high temps esc : seems like you were running it most off the time partial throttle

Yep it was doing a bit of that, probably due to battery positioning, I did not bother checking the cog.

Could also do with trimming the prop angle I reckon, might also try tubing directly into the esc first as well.

[helidan]

Yep, I ordered four of the Zippy Compacts (4s, 3700mah, 35C) and so far I can't fault them. I can probably push 7mins runtime and still have some reserve capacity. Lipos are barely warm after use. My boat was rewired to run the packs in parallel.

Just waiting on a magnetic balancer now so I can set about sharpening and balancing the prop.

Yours seems to be running well btw. 4s or 6s?

[helidan]

Have you checked your cooling flow Nigel? Mine required some filing to the rudder slots to get the water to flow reliably. I also slotted the jacket nipples with a Dremel. Just waiting for some tubing to arrive so I can re-plumb the entire boat, ESC first in the loop.

[Nigelpugh7]

Yep, I ordered four of the Zippy Compacts (4s, 3700mah, 35C) and so far I can't fault them. I can probably push 7mins runtime and still have some reserve capacity. Lipos are barely warm after use. My boat was rewired to run the packs in parallel.

Just waiting on a magnetic balancer now so I can set about sharpening and balancing the prop.

Yours seems to be running well btw. 4s or 6s?

I am running 4s, 5000mah 35 c.

What is the advantage running them in parallel out of interest?

My batteries get very warm after use though!

[Nigelpugh7]

Have you checked your cooling flow Nigel? Mine required some filing to the rudder slots to get the water to flow reliably. I also slotted the jacket nipples with a Dremel. Just waiting for some tubing to arrive so I can re-plumb the entire boat, ESC first in the loop.

That's interesting , what did you do file the holes in the rudder out? You will have to show me a picture of what you did to the nipples, I have no idea what you mean on that!
I think that I will be re doing the water pipe too, it needs to be bigger to help the flow, what size did you go for?

[helidan]

I just used a small round needle file and elongated/deepened the slots on both sides. Afterwards I polished up the slots with a bit of wet-and-dry. Regarding the nipples, if you take a measurement from the outside of the jacket to the inside and then also measure how much the nipples screw into the jacket you might find the bottom of the nipples are very close to the bottom of the jacket which could impede the flow. All you need to do is cut a couple of small slots in the end of the threads to allow a bit better flow.

The tubing I went for is 3.2mm id thickwall stuff. I also ordered a transom water pickup but I don't know if I'll actually fit it.

[Fr8cture]

I'm about to buy my Blackjack 29 either tonight or tomorrow. My question is about batterys. I'm either looking at SMC 7200mah 60c 2s or SPC (which I've used before) 8200mah 50c 2s. I would like the bigger batterys but would that be too much weight?

[Paul Killick]

I use two Turnigy 3s 5000mah 20-30c packs in series and changed the prop to a Octura m440 but running it at 4s with a x442 prop speed is similar and a fair bit more stable.

[Fr8cture]

From what I read 20c is not a good idea. More concered about the weight of a 8200mah pack not the c rating though.

[Paul Killick]

Well my Blackjack V3, Arowana 31 and a Hydro all use the 20-30c 5000 packs in series and have never had any problems, I get 5-6 minutes with the blackjack using the standard motor and esc although I will be changing the motor for a Leopard as several at my club have done this, a few have 1400kv and 1700kv seem to be more efficient motors.
I have tried larger mah packs from others at the club but as you have mentioned this adds additional weight and size.

[ray schrauwen]

Paul, if you are wanting to sell the stock motor I may be interested. Posting from UK to Canada may be crazy though.