38,8" MHZ Racemaster build

[Darkcyber]

Was that a newer release esc? Quality control used to suck for them but I know it has been improving

As i understand it was a last release of ESC. I think it can be with ESC of the any another manufacturer.

I had a 450amp flier for a 1/5 truck, never worked from the day I got it, getting it repaired and converted to marine in the uk

It is a new china produce, it is 50/50, work or not work. But this ESC is a very quality product with good cooling system and can repair can know any alternative for the HV ESC for this cost.

[Luck as a Constant]

dang it

[Bigbore]

I think you're running your boat wet

[Aleksey72]

Test

Test : http://youtu.be/t35JVU7haFA

[Darkcyber]

With Flier ESC.
Battery - 60 degrees,
Motor - 50 degrees,
ESC - 30 degrees

[Darkcyber]

[Roy Van De Sande]

Battery temp is way to high. Max temperature is around 50°C. Any hotter will damage your lipo's.
Boat is also running a little bit wet. Running your boat with less hull in the water will be beter for
your current draw and will extend the lifetime of your lipo's.

Regards,
Roy

[Darkcyber]

Battery temp is way to high. Max temperature is around 50°C. Any hotter will damage your lipo's.
Boat is also running a little bit wet. Running your boat with less hull in the water will be beter for
your current draw and will extend the lifetime of your lipo's.

Regards,
Roy

Thank you, i know this things. This motor is some weakness for this boat. It was work at the maximum of his opportunity. Today motor was failed. Next spring i will buy new TP 4060 4Y.

Maximum speed of all runs is now 92 km/h

[srislash]

So which prop do you have on there in that run. My DF would ride like that with a prop with too much pitch.

[Roy Van De Sande]

There is a reason why you burn of your esc and your motor failed you now. I would really change your cg and run your
boat not so wet because even a completely knew motor will fail in time if you keep it running like this.

[iridebikes247]

Packs shouldn't get too hot, anything over 120 degrees is pushing it in my opinion. The batteries could have contributed to esc failure too, I suggest a 2p setup if you're not already running one or higher mah single packs. This is a faster mono and I think must be treated as one, a tp 4070 would serve you well or perhaps a neu 1527.

[Roy Van De Sande]

A TP4070 is overkill in a skinny racemaster. I know people who get 80-90km/h out of a racemaster with just a TP3040 on 6s. Those boats
are running loose and you get 5min of runtime out of a 5000 6s 40C Zippy lipo. Just search for some other racemasters on youtube. You will
see, a racemaster shouldn't run that wet. MHZ recommends a lehner 1950 for a racemaster. A lehner 1950 is also just 36mm in diameter
and 74mm in lenght. You can get up to 100km/h with that tiny lehner if your boat runs correctly. Think twice, you can put more, and more,
and more power in you boat, but in the end, will that be the solution for the problems you have (hot lipo's, burned esc, broken motor)?

[Darkcyber]

So which prop do you have on there in that run. My DF would ride like that with a prop with too much pitch.

Octura X645 prop.

[Darkcyber]

Packs shouldn't get too hot, anything over 120 degrees is pushing it in my opinion. The batteries could have contributed to esc failure too, I suggest a 2p setup if you're not already running one or higher mah single packs. This is a faster mono and I think must be treated as one, a tp 4070 would serve you well or perhaps a neu 1527.

not packs, motor is 120 degrees. This temperature is not at run, it was a fail reason. I was try to connect and run motor at home. It was warm very fast and middle wire is dangle. I think this is a reason of the highest temperatures.
TP 4070 is very powerfull for this boat, i think. TP4060 is a real compromise

[Darkcyber]

There is a reason why you burn of your esc and your motor failed you now. I would really change your cg and run your
boat not so wet because even a completely knew motor will fail in time if you keep it running like this.

A TP4070 is overkill in a skinny racemaster. I know people who get 80-90km/h out of a racemaster with just a TP3040 on 6s. Those boats
are running loose and you get 5min of runtime out of a 5000 6s 40C Zippy lipo. Just search for some other racemasters on youtube. You will
see, a racemaster shouldn't run that wet. MHZ recommends a lehner 1950 for a racemaster. A lehner 1950 is also just 36mm in diameter
and 74mm in lenght. You can get up to 100km/h with that tiny lehner if your boat runs correctly. Think twice, you can put more, and more,
and more power in you boat, but in the end, will that be the solution for the problems you have (hot lipo's, burned esc, broken motor)?

I don't see any single motor racemaster, what runs more than 90 km/h at youtube. Some boats with lesser motor and lesser prop was run 60-75 km/h, but it's to small for me.
I have an idea about power problems this boat, it is a big prop. I think about 43-44 with 1,5 or 1,6 pitch. I can't find any of this at this season. Next spring i will find some props for the tests and will complete this boat at the 90-100 km/h with normal temperatures.

I have a question about running boat wet. Wha can i do to solve this problem? I was try a some stinger configuration, i was try a some battery position. But i can't up the hull from the water.