8s build help

[Crash]

Afraid of what?

I assumed he meant afraid of going to fast with the Voracity hull.
this hull is couple years old and has been reinforced with FG threw out hull.

Afraid of 8s ? NO, its awesome . I tried 5s recommended from the info and advise here. I tried 6s and then tried 8s. its true once you go 8s you don't go back. lol
its a animal like I wanted, yes its over powered for sure. Ran my 52mm prop today for fun to see the data and it ran killer...this hull loaded is over 10 lbs and it jumps out of the water like a rocket and does not stop until you get scared and back off throttle.
all that fun at and amps are good, temps are good …….

[Alfa Spirit]

Afraid of what?

The hull is a 36'' Voracy... Not a MMP Rapid or MHZ Racemaster (39'')

[Crash]

The hull is a 36'' Voracy... Not a MMP Rapid or MHZ Racemaster (39'')

no its not but, I do have a quote in my gmail for a phantom/Racemaster hull and hardware …………...lol

have tentative plans of buying that hull and hardware and using my motor and esc

just 600 short #gofundme
Dear Dannie,

enclosed please find photo`s of the ARTR hull. Included are:

- Phantom hull C-AFK - 142,86€
- Rudder (pop up function of rudder blade, incl. water intake - 91,60€
- Strut for 3/16"
- Brass / PTFE hose
- flex shaft
- Rudder steering left + right - 14,12€
- water outlet - 2,94€
- motor mount - 33,19€
- ESC mount
- rails
- batterie mount
- flex safety with bearing - 19,33€
- support of brass / PTFE hose
- outlet for strut - 6,72€
- all assembled with polymer glue - 336,13€
Total: 646,89€

Further we could include coupling regarding to motor shaft size. Silicon hose + clips

Best regards

MHZ

[Prodrvr]

I don't have a 36 Voracity...what am I missing?

[Crash]

I emailed hiefie to get their opinion on my data log.

[madmikepags]

The over heating of esc's in boats at low throttle and on and off throttle is mostly because of parasitic drag, Airplane car and boat controllers are pretty much the same. How come I can run my Rc cars and planes on off on off all race and flight long. To accelerate a boat from off plane to on plane draws so much more amps than a car or plane. Remember your boat is in WATER, when you come off the throttle the boat wets down and then all you have is that little prop to get it back up to speed. For example I have a 1/5 scale 4wd on road car, it does about 60mph with a castle 2028 on 8S and I can get about 9 minutes of run time on 10,000mah going on and off the throttle the whole time. In comparison my sprintcat with the same motor on 10s and 12,000mah I get about 4-1/2 minutes running at 65mph. and thats mostly at full throttle for an offshore race. My huge 80 inch plane on 5000mah gets 7 plus minutes doing all out 3D maneuvers. The water is the limiting factor, when you go slow more of your boat is in the water and thus uses more amps to push it through the water.

[Crash]

I emailed hiefie to get their opinion on my data log.

"I’m Zoe from hifei technology, so glad to be at your service. Please don’t worry about it, our engineer told me that thers is no problem when you run the ESC at the partial throttle. Besides, you run your ESC at 80 to 90 % throttle threw will not cause damage to your ESC. If you have any questions, please feel free to contact me!"

Thats straight from Sword Fish .
Seems they are ok with partial throttle with the 300X

[Crash]

I got 76 mph today at 82% throttle / 296 amps / 34,900 rpm / ESC 52 C. / 652 propeller

This boat is turning out to be just what I wanted, you can sport around in the 60 mph range and also lay down 90 mph pass if you have the nads to hold the throttle down....

[Prodrvr]

Nice!!

[Speed3]

Glad to hear things going well.

[Crash]

Its true what they , too much info is dangerous to the uninformed.....lol

I am reading my data log after runs and today I got ballsy and did a couple 100% pulls on the throttle to get some data.

The amp spike is expected but, the rpms seem to be way low threw out run at any throttle position.

Is it possible my motor cant turn this big prop as fast as its intended?

TP POwer 4060 3y / x652 prop

[Prodrvr]

Have the timing cranked up?

[Crash]

no , its set at 0

[Crash]

Aoct13ampspike100throttle.jpg

this is a 87% pull on throttle

[Prodrvr]

It's a Y wind motor. Set the timing to 10 and test. If all is well, keep bumping it up in increments to 15.

[Crash]

It's a Y wind motor. Set the timing to 10 and test. If all is well, keep bumping it up in increments to 15.

OK. I did email TP Power to get their recommendation and they said zero. the motor runs cool so I am sure it wont mind timing up .

Thanks Prodrvr I will try that and watch motor temp.

This motor has been getting up to 10,000 watts and 380 amps in 1 to 2 seconds at a time …which is way over its max

[Prodrvr]

As long as your temps are good when you bring it in, I wouldn't worry too much about what the logger is telling ya.

[Crash]

I went out today.
Ran it with timing turned up. Ran great temps stayed cool.
So, I decided to push my luck with this setup...
Set the esc to 10s and went for it.
It was epic.
Temps are good, amps are down, rpm is up.
I only ran one set of packs for 4 minutes but, I will try it again.

[Prodrvr]

Nice!! Keep going!

[srislash]

I went out today.
Ran it with timing turned up. Ran great temps stayed cool.
So, I decided to push my luck with this setup...
Set the esc to 10s and went for it.
It was epic.
Temps are good, amps are down, rpm is up.
I only ran one set of packs for 4 minutes but, I will try it again.

As it should be in a good setup. Great going. Can’t wai5 to see vid. Runtime should be better too.

[Crash]

hello guys.
I am still punishing this boat at the lake.
Recently I acquired a 3 blade prop 848 and you know I had to run it on my 1650kv. @ 9s lipo……………...lmao it was the bomb. only pulled 340 amps once during the run and averaged 200 on most pulls. temp of esc was normal 59C
rpm's where up to 43600

so my only issue was this prop will not get the boat on plane fast enough, it seems to be grabbing air or maybe slipping I don't know. once it got on pplane it was like a sling shot forward. what about this prop makes it suck out of the hole but Great on the topend?

Thanks guys "IM NEW"

[StevenBryant]

Crash

What you are experiencing is “cavitation” there are several reason for this and without seeing the prop it is hard to say. My best guess would be a reduced blade area most noticeably at the leading edge of the prop, I’ve found that the ABC 18-38 props cavitate a lot on MONOS until the boat is on the plane and then they are like a missile.

[Crash]

It's
Its a Cnc from OSE
1110181653.jpg

[Crash]

1111180738c.jpg1111180738b.jpg1111180738a.jpg

[fweasel]

That's a high pitch prop with no tounge area, I would expect it to perform just as you described on a relatively heavy mono of that size

[Crash]

That's a high pitch prop with no tounge area, I would expect it to perform just as you described on a relatively heavy mono of that size

help me to understand, what is the tounge area on the propeller and what should I look for if I want to run a prop this size?

[StevenBryant]

help me to understand, what is the tounge area on the propeller and what should I look for if I want to run a prop this size?

Crash the octura prop shown below has the tongue section marked, this area gives the prop the bite when at low speed, unfortunately because the pitch is low it also causes drag at high speed.


Sent from my iPad using Tapatalk

[Crash]

Excellent , thanks.