6.5mm vs 8mm Bullets

[PlayerUnknown069]

https://www.offshoreelectrics.com/pr...7-45%282%29CLL

1915 - 17 - 45 - (2) CLL
For a finished, sharpened, Balanced, and hardened, prop.
get ahold of (Dasboata) here;
https://forums.offshoreelectrics.com...dasboata+props

Larry

Thanks! I actually have a Dasboata 3 blade prop that got me in the 70?s.

I didn?t think of that, thank you!

[larryrose11]

Monos have a lot of drag in comparison to other hulls.
That drag translates into more torque in the system for the same speed.
That is extra amp draw, which burns parts up.
The KV selected for a mono is typically more conservative.
Props selection typically use a 1.4 pitch, and a larger diameter.
There is also the effect of prop cavitation at higher RPM.
Props seem to do better below 38K on riggers, lower still on monos (not my specialty)

[PlayerUnknown069]

Larry,

On the ZTW 200amp there is no data log so I can?t monitor the ripple voltage. Do you recommend running a cap pack with the ZTW considering boats have higher amp draw?

My experience is more with speed run cars and it doesn?t become necessary with the right gearing unless you are drag racing or getting into 130mph plus speeds.

[TRUCKPULL]

Sorry - I do not have any experience with ZTW ESC's.
I would say - give it a try first. If the caps run hot, add some more.

Larry

[koen]

i use ZTW 200 in a mhz phantom with a tp4070 1400kv on 8s and no problem ,the caps are in the cooling circuit so they never get hot the highest temp i measured was 40c with a 5016/3 prop

[PlayerUnknown069]

i use ZTW 200 in a mhz phantom with a tp4070 1400kv on 8s and no problem ,the caps are in the cooling circuit so they never get hot the highest temp i measured was 40c with a 5016/3 prop

Thank you! I ordered a cap pack just in case but hoping to not use it.

[PlayerUnknown069]

I have some cooling questions, hoping some of you experts can chime in.

I have never plumbed in the motor water cooling plate. I always cool the ESC and motor jacket on separate loops.

Is it worth plumbing in a new pickup and outlet for the motor plate?? I do not want to waste my time on a 1 degree difference.

[TRUCKPULL]

Is this the motor plate that you are talking about.
https://www.offshoreelectrics.com/pr...od=ose-80230-b

If so, most people do not connect cooling to it, it has too much restriction in it.

Larry

[PlayerUnknown069]

Is this the motor plate that you are talking about.
https://www.offshoreelectrics.com/pr...od=ose-80230-b

If so, most people do not connect cooling to it, it has too much restriction in it.

Larry

Larry, yes that?s the one but with the rear mounting ring.

Yeah I see most dont use it. I would run it on its own loop and not restrict my water jacket or esc. But, is it worth the trouble, drilling a carbon hull?.seems like a no?

[TRUCKPULL]

NO!

Larry

[Bande1]

Is this the motor plate that you are talking about.
https://www.offshoreelectrics.com/pr...od=ose-80230-b

If so, most people do not connect cooling to it, it has too much restriction in it.

Larry

is cooling more efficient if its necked down giving more time for heat transfer?

[jaike5]

Heat travels to cold. So the colder the surface, the faster the heat transfers.
J.

[Capt. Crunch]

You're going to get the greatest heat trans fer with more water running thru the cooling jacket/esc.
Heat transfer is dependant on the difference in temps between the hot side & cold side, more water means it keeps the flow going at a higher rate so water only heats up a little while in the jacket.
Best is too have 2 circuits, one for each device.

The cooling blocks are a hold over from dc motors that the brushes create the heat & need to be cooled. The brushes are at the end that goes against the holding block, this gets the most heat away from the brushes.

[fweasel]

is cooling more efficient if its necked down giving more time for heat transfer?

Not in an open loop system. Flow is your friend.

[PlayerUnknown069]

You're going to get the greatest heat trans fer with more water running thru the cooling jacket/esc.
Heat transfer is dependant on the difference in temps between the hot side & cold side, more water means it keeps the flow going at a higher rate so water only heats up a little while in the jacket.
Best is too have 2 circuits, one for each device.

The cooling blocks are a hold over from dc motors that the brushes create the heat & need to be cooled. The brushes are at the end that goes against the holding block, this gets the most heat away from the brushes.

Makes sense, brushed motor I do believe generate more heat.

I would run it on a 3rd water circuit, I already have two and have one more pickup off needed. Like Truckpull Larry said above, it?s not worth drilling my carbon hull for.