Mark F's monster Speedfreak Hydro on 20 Cells !

[Drax21]

I like the high voltage idea, but have some questions.

What are your packs configured like? IE 2 single 10s packs in series?
If so where do you get a pack like that?

What are the hazards involved with voltage this high?

Hazards = death. This voltage could kill you. The 10s packs definitely make a nice explosive. I have seen it happen before. 20s... now that's a big bang! You probably want a bit more detail than this though.

[MarkF]

Another thing I should mention is the temps of everything. The motor was only warm with no cooling. The batteries were a little on the warmer side but for this test I was running 2 6s 5000 and 2 4s 5000 in series. These packs are 2 years old and slightly puffed. It would be better with 2 10s packs and you can get them from Thunder Power and I'm sure other places.
The controler was the coolist part in the boat with it being almost cool feeling. Sorry no temp gun with me at this time. This controller is only rated to 100 amps but has worked great for 3 different test now.
Steven, high voltage is no joke and care needs to be taken. This is not for everyone but it does allow us to run setups with longer run time at a lot less amps. I think its unfair for people to try to single out the negatives of high voltage when there's so many things you can buy off the shelf in this life that can kill you. Just like buying a gun or 150 mph street bike you have know what your getting into.
I think maybe a better way to connect everything up than the bullet system were using would be a step in the right dirrection for added safety as its easy to screw that part up.

Mark

[Steven Vaccaro]

I think its unfair for people to try to single out the negatives of high voltage when there's so many things you can buy off the shelf in this life that can kill you. Just like buying a gun or 150 mph street bike you have know what your getting into.
I think maybe a better way to connect everything up than the bullet system were using would be a step in the right dirrection for added safety as its easy to screw that part up.

Mark

Mark please understand as the owner of this site I believe it wouldn't be right of me NOT to bring these issues up. At this point I'm not for or against it since I haven't used anything like that to judge for myself, thats why I've asked the questions to get them out there.

[MarkF]

Your right I should have said I hope people turn this into a you can kill yourself thread because it would take away the good that comes from this kind of testing. We all know the dangers of buying a rifle and this is no different and I hope people see it that way.
Mark

[Fluid]

I think that most readers will see it that way Mark. Unfortunately the hobby has a minority who just want to have something "cool" and "unique" - without the background to do it right. Those are the folks who will get hurt - or hurt others - because they do not understand the risks. I would hate to see someone jump from a SV27 right into a 20-cell, 27# mono - but of course it will happen.



.

[Steven Vaccaro]

Your right I should have said I hope people turn this into a you can kill yourself thread because it would take away the good that comes from this kind of testing. We all know the dangers of buying a rifle and this is no different and I hope people see it that way.
Mark

Sorry if you take it that way Mark. I enjoy watching your testing, but if you cant understand my side of it, than I guess we just have to agree to leave it at that.

[MarkF]

I can assure you I do see your side of it and I agree with you. I thought your questions were good ones and I don't see were I disagree with you. My statements are more of a generalization and maybe a little premature but they were not aimed at you. I'm sorry if I made you feel otherwise.

mark

[carlcisneros]

anyways.............................

Looks like Mark does the HV testing for FC and I have been doing the LV testing on the new ESC's.
so far it seams that he has a great product and if precautions are naturally followed, then all will be
very happy with the new line of ESC's.

I love watching Mark's Big Azz sport hydro running on you-tube.

Now, if was can get some of the hull manufacturers to make cowls that are easy to secure
for the FE crowd...........................

Can't wait to see Stevens new rigger video once it hits the water.

[NativePaul]

Hey at least your allowed 10000-12000mah over there (depending on voltage/class), here in Australia we can only get away with 5000-5200mah (our rules are based on a pack weight of 150g per cell). Try getting long run times out of that!
6BOOST

We are only allowed 140g/cell or more accurately 280g per 2or3cells and run hydros for 5 minutes and monos for 6 minutes. It's obviously not as fast as you sprint guys in OZ and USA, but its definitely FE and easily fast enough to be fun, too fast for some they have already killed mono/hydro3 and are talking about doing the same to hydro2 or increasing the run times again to keep the speeds in check, though I'm quite happy with getting faster naturally with technology increases personally.

[Steven Vaccaro]

I can assure you I do see your side of it and I agree with you. I thought your questions were good ones and I don't see were I disagree with you. My statements are more of a generalization and maybe a little premature but they were not aimed at you. I'm sorry if I made you feel otherwise.

mark

All cleared up, sorry about the misunderstanding.

I have a boat I would love to try a hv setup on. It wont happen for a long time.

Right now I'm sticking with 10s setups. I have to look at the 10s thunderpower packs. My concern is all the wire in a hull. I shorted a 5s pack against my water jacket last night. It made a hole about 1/8" deep!!!! And scared something out of me :-)

[MarkF]

10s setups are a nightmare. I know I've run 10 and 12s setups for years at saw events and for sport. When running 10s 2p my favorite packs are 5s 2p series up to make 10s. 10s sticks are great too but you can't use them for anything else. Thunderpower still makes the 10s sticks but I'm not sure about the 5s packs. You could make your own packs if your comfortable with your soldering skills. I know there's a place for high voltage and I'm going to having fun trying to figure out were that place is.
Mark

[Steven Vaccaro]

Mark do you have any interior pictures of the 20s setup?

[MarkF]

Here are my photos. As you can see I have lots of space in front of the motor. I am using 2 6s packs and 2 4s packs in series. I put the first battery in the boat and plug one wire into the possitive side of the speed controll. This leaves only one wire comming off the battery. I then put the second battery in the boat and hook up the one wire left from the first battery. I do the same with the rest of the packs. This keeps me from plugging anything in wrong.

mark

[Steven Vaccaro]

I put the first battery in the boat and plug one wire into the possitive side of the speed controll. This leaves only one wire comming off the battery. I then put the second battery in the boat and hook up the one wire left from the first battery. I do the same with the rest of the packs. This keeps me from plugging anything in wrong.

mark

thanks!! I like that idea. I have been loading the boat with batteries and then connecting them all up.