deltaforce 33 high volt

**fastblack** · 07-10-2011, 07:21 AM

speed

did a testrun today in some chopp water (waves) the boat dit 85kmph
it did 90kmph on flat water(no waves) so i guess the x440 dont grip as good on waves vs flat water.. and the motor will give max rpm on flat water also..

another thing i have the stock castle hydra 120a HV esc
and the caps were pretty warm at 8cell with the x440, maybe 47degree celcius, i innstalled 1
1000uf 35v cap on the esc + and - wires and the heat was alot cooler on the esc caps but the 1000uf 35v cap was warm, today i installed another 1000uf 35v cap too + and - esc wires and when i had run a whole 8 cell 4000mah pack, i checked caps temps and it was about 25 degree celsius on all caps including esc caps! adding extra caps really works! just add 2 and 2, not just 1. 2 works muuuch better..

**BILL OXIDEAN** · 07-10-2011, 07:31 AM

Hi

You sound great, just get outta' the Deans connectors for battery..
Go ahead and jump to 6.5 for batt connectors too, and you'll be able to take this setup further.

Deans are magnificent connectors, I swore by them for years, but the continuous current draw of a modern FE boat is too much for 'em.

Micros love em all year, but with what you're doin' you're asking for a short if you prop up which your temps indicate you can do..

**fastblack** · 07-10-2011, 07:47 AM

ok, but i have run deans for several years as long i dont push over 100amp they are fine.

another thing is a friend of mine wich also har a deltaforce 33 with neu 1521 1577kv and turnigy 180amp esc running 6 cell 3900mah 50c kypom batteries, x645 detounge, he is pulling about 130amps + I guess, he has been using deans for 2 years but they get much much hotter than mine on 100amps.. 130amps + is too much for the deans he got 76kmph with deans and switched too 5,5mm gold bullets then he got 77kmph, but the temps on the connectors went down.

he is very dissapointed with the speed people here on OSE recommended the setup and said it should give 90-100kmph.
what is wrong with his setup? the boat dont go wet(deep in water). the trimflaps and strut is trimmed nice.. the esc caps and batteryes get pretty warm..

OSE speed calc says 102kmph with this setup he is only getting 77kmph

**BILL OXIDEAN** · 07-10-2011, 08:03 AM

Hi

I'm indeed just in from a champagne filled night on the town but I'll tell you the honest truth.
There are Many guys on this forum that truly speak what they know and know what they speak unfortunately they're so busy putting their efforts into actually DOING this hobby they don't answer questions much.

Then you've got a handful of "speculators", guys who show up at events when they're near their house, never run anything, never set records or do anything noteworthy but have ALL the advice in the world on these forums.

their opinions are based on things they read on here. Always remember boats aren't like cars. Setups can be very boat specific. A boat hull is a sensitive vehicle. A company can have 3-5 molds for one particular hull and there can be inconsistancies and that's only one of the variables that can affect things. Weight distribution, prop depth, all of these things play a huge role but are not always specified.

**fastblack** · 07-10-2011, 08:15 AM

ok maybe he should try x642 detounge because his batts and caps get hot with the x645 detounge and the x642 detounge should give 95kmph according too OSE speed chart.. it doesnt sound like he is getting enough rpm with the x645 detounge... his supervee 27 with neu 1515 1500kv and turnigy 180amp esc on 6s with x642 screams more rpm at full throttle... so i guess he should try a smaller diameter prop..
the supervee gave 75kmph. 1500 and 1577kv should give a little more top end with same prop i hope

**fastblack** · 07-12-2011, 10:00 AM

i tried 9cell lipo 3800mah 35c kypom today on the leopard 4074 1400kv
x437/3 prop
castle hydra 120amp esc
the speed was only 88kmph

this means the motor wont push anymore rpm in the 33 delta hull it dont have enough power/torque i guess

i got 87kmph on 8cell with same prop so 9cell didnt do much of a difference.

the temps were low cold motor! cold esc! caps were normal 30 celsius, batts were also ok

dont see why there is not possible too get this 4074 leopard warm?? anyway its a great motor but i dont think it is able too push a delta 33 over 90kmph.

**fastblack** · 07-19-2011, 02:39 PM

did a couple runs today, ran first on some small chopp (very small waves) with turnigy nanotech 4000mah 8cell 25-50c batteries.
it gave top speed 93kmph the highest so far (59mph).

then with exact same setup on kypom 35c 3800mah 8cell it ran 83kmph on flat water.

then i tried turnigy nanotech 4000mah 8cell 25-50c again on flat water it was 90kmph.

so the kypom batteries are not a very good battery it doesnt seem too deliver the C rating it should be able too.

turnigy nanotech is very nice i also tried rhino 25c 4000mah it gave same result as turnigy, and + 7 - 10kmph more than kypom...

**rc2266** · 07-19-2011, 03:20 PM

Try a higher c rating battery and see what happens, might suprise you

**fastblack** · 11-24-2011, 01:04 PM

the leopard has now been run on 7cell and 8cell lipo all summer, best setup was 7 cell x442 detounge, then i had amp draw at 100amps, 8cell and x440 detounge was about 100amps too but the prop was too small i had issues the boat was not stable, the df33 hull needs a 42mm prop or bigger.

Well anyway there is no problem running the 1400kv 4074 leopard on 7 or 8 cell, it has no problems/heat just dont use too big prop.
I have only 120amp hv esc thats why i could not run 8cell with 42mm x442 prop, otherwise i think the engine would not have problems with that prop on 8cell if you use bullets and 45c battery+

New motor on the way: Leopard 4082 1000kv i think i will be running this on 9cell or 10cell lipo.
What prop would you recommend? maybe a x645 detounge? or x642 detounge?

Will it be fast?

**fastblack** · 12-02-2011, 02:32 PM

deltaforce 33 10s leopard 4082 1000kv x645 detounge

deltaforce 33 10s1p 4500mah 25c lipo leopard 4082 1000kv x645 detounge

The boat runs great top speed so far is 105kmph 66mph =) niice

amp draw 100-110amps motor:cold (3800watts)

deltaforce 33 high volt

deltaforce 33 high volt

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