How the Europeans do it..

[Xcesive8]

Anyone out there in the know about how the Germans amongst other countrys set up banks of lipo's?

Majority of them have these carbon holders made up to house lipos laying down end to end, then wire there plugs to the end where they plug in to esc's.
They also slide in to place in hull and lock in place

Also newb question here, but how do they limit the amout of wireing length you would need between esc's and batts if the last pack is down the far end and would have a wire length of a considerable amount?

Not only is this neat, but safer as batts are in some way protected from going which ever way they please in a blow over, therefore cant damage themselves and rupture cells or do damage to hull.

Anyone???
Heres what i mean >
PICS TAKEN FROM www.rc-raceboats.de/

[Simon.O.]

I am in a bit of a quandry here. I love the attention that has gone into building a pack like that and appreciate the engineering that is involved in a boat that has those packs. However I have also seen the losses (only on vid's) that occur when it all goes bad.

I would love to have one, a BIG twin cat but am unsure if I could take the loss when it all goes to smoke very quickly.
It is an accademic arguement for me as unless I win a good lottery ( must buy a ticket first) I will never own such a beauty/beast.

The European engineering is outstanding. This is not just with FE boats but with many forms of mechanics, design and fabrication.

[ozzie-crawl]

hey ryan i have access to most of the electrical parts at work if you want to do a set.

[Xcesive8]

Yes I would really like to put something like this together.
The way in which my 4 x 5s packs sit inside the sponsons with velcrow
just seems so unfinished to me. I'm lucky they didn't crack my hull in that blow over that day..

So about the wire length, what do you think?
How do the run wireing that far of the last pack?

[sailr]

All of those additional connectors just look like more possibilities for resistance or failure as opposed to the wire soldered to the pack at the factory!

Looks high techie and the germans love that. I'd rather go for practical and functional.

[SJFE]

I really like the power banks he built. I am a clean hull freak and thats right up my ally. As stated I would love to build one and will be able to when we get in the new house and I have a shop again. The problem is I can only do it once. If it goes up in smoke thats all for me.
This is why my big boats going to be a gasser. Sure they are loud, stink and are messy. How ever if the power system blows it just some honing and a set of rings. 50 60 bux. Worst case a cracked case 250 bucks tops.

[sundog]

Germans are well known for over-engineering. Have you ever looked inside a Pfaff sewing machine? Too much stuff. God save the mechanic who has to replace anything in there!

[Xcesive8]

Germans are well known for over-engineering. Have you ever looked inside a Pfaff sewing machine? Too much stuff. God save the mechanic who has to replace anything in there!

Lol yes i would have to agree! ^

SJFE & SimonO -
Your right it is scary when you have one of these big cats ( Mine being the smaller end of them at 54") , and youve got alot of $$$$ in it.
But when i think of the dollars i would of spent on cars and race bikes like ive done in the past, its a cheap hobby lol, and one that still gives me butterfly in the stomach, shaky hand on the controller at times, smile on the face! Nothing more i could ask for..
Wish i could win lotto, i DO buy a ticket here and there but nothing
I want a 72" Mystic !!!

[m4a1usr]

Also newb question here, but how do they limit the amout of wireing length you would need between esc's and batts if the last pack is down the far end and would have a wire length of a considerable amount?

Not only is this neat, but safer as batts are in some way protected from going which ever way they please in a blow over, therefore cant damage themselves and rupture cells or do damage to hull.

The answer is pretty simple. They plan on the correct location for pack/cell bank attachment and either put their speedo closer or increase capacitance to compensate for longer wire lengths/ wire impedance. We seem to take the speedo manufacturers word for such things as wire length as an absolute. And for the general hobby type folk thats not such a bad thing as they are going to want that warranty. But its obvious from alot of builds that you are not limited to 8 to 12 inches of wire lengths between speedo to your energy source. You just need to calculate the specifics to adapt to.


John

[Gerwin Brommer]

Sailr :

i don't get your point.

The RTR packs you buy have : 1 balancerconnector, 1 neg. lead and 1 pos. lead.
So do the DIY European hardpacks.
BTW : the red and blue connectors are all handmade by "Catpower" , they are connecting far better then any connector/bullet you will ever see.
1 set of female(only) blue and red connectors is 12 euro.


Ryan : why don't you just put a sheet of carbon or glasfiber under your packs and
attach the packs to it. Than place the whole pack in place with velcro and velcro straps ?

Wiring lenght : home made 10S pack or same pack bought : cables are just the same lenght.

Kokam cells : neg. and pos. are on both sides of pack.
Zippy Flightmax : both ne. and pos. are on same side.
They are much more easy to "rebuild" .
I soon will make 2 10S2P hardpacks from Zippy's. The lead will come out of the middle, instead from 1 side.
That keeps the lenght of the cables much shorter.

[JCAustralia]

It seems that culture is a big influence in the hobby.

Some of the German stuff I've seen looks so neat, highly engineered and are of such high quality..... with the associated costs. They do remind me of German cars like Porsche, Mercedes and BMW, very high quality but also very expensive.

I really do admire some of those German hobbyists that are perfectionist in the hobby.

They seem not to settle for anything else than perfection. They use the best materials and products in their builds that looks perfect with no flaws when completed. Love their approach to the hobby and it must be very satisfying to build such great boats. They probably have deep pockets also.....

JC

[Xcesive8]

Sailr :

Ryan : why don't you just put a sheet of carbon or glasfiber under your packs and
attach the packs to it. Than place the whole pack in place with velcro and velcro straps ?

Wiring lenght : home made 10S pack or same pack bought : cables are just the same lenght.

Kokam cells : neg. and pos. are on both sides of pack.
Zippy Flightmax : both ne. and pos. are on same side.
They are much more easy to "rebuild" .
I soon will make 2 10S2P hardpacks from Zippy's. The lead will come out of the middle, instead from 1 side.
That keeps the lenght of the cables much shorter.

Yes i probably will just do the above, lay some carbon or carbon/kev on the bottom of the sponsons probably pretty long to. That way i can change the weight around for different applications.
It all seems a little difficult doing a "Catpower" setup!

The thing that confuses me is Schultz wiring recommendations, and then people saying you dont have to go by what they say entirely.
I had to shorten all my batt leads to ensure i stayed under there rec' 10 inches 25cm red, 25 cm black.

Heres some pics i just took, 2nd pic is how i run for now, but these are only 5s packs, when i get 6s packs they wont fit.
If im to put end to end i would go over this 10 inches very easliy with the last pack.?? If im to add extra capacitors, how much length can i add?

Cheers for the help guys

[ozzie-crawl]

okay i know iam going to cope it over this but here goes anyway.
i think this whole "wires are to long" business is crap.
if pushing your electrical system ie motor/esc/batts to the limit then yes resistance
does make a diffrence.
i think a lot of this comes from the days of brushed motors and nimh batts.
it used to make me laugh when i would go to a rc car racing event and guys solder batts straight to the esc and esc straight to the motor whybecause thats what the world top drivers do whybecause they are pushing there gear to the limit and each lap they run is with in tenths of a second,so chasing tenths of a second to them is important
but now days with brush less motors,high amp esc,s and lipos that can deliver huge amounts of amperage if we have it setup rite our systems have a fairly large head room built into them.
this is just my thoughts on somthing i believe has gotten way out of proportion
but iam no expert so fire away

[sailr]

Where you normally would have the two wires coming out of the pack, there are now male/female connectors. Just more places for trouble to occur.

Sailr :
i don't get your point.

The RTR packs you buy have : 1 balancerconnector, 1 neg. lead and 1 pos. lead.
So do the DIY European hardpacks.
BTW : the red and blue connectors are all handmade by "Catpower" , they are connecting far better then any connector/bullet you will ever see.
1 set of female(only) blue and red connectors is 12 euro.


Ryan : why don't you just put a sheet of carbon or glasfiber under your packs and
attach the packs to it. Than place the whole pack in place with velcro and velcro straps ?

Wiring lenght : home made 10S pack or same pack bought : cables are just the same lenght.

Kokam cells : neg. and pos. are on both sides of pack.
Zippy Flightmax : both ne. and pos. are on same side.
They are much more easy to "rebuild" .
I soon will make 2 10S2P hardpacks from Zippy's. The lead will come out of the middle, instead from 1 side.
That keeps the lenght of the cables much shorter.

[Gerwin Brommer]

Sailr : and what is at the end of the wires at your packs ?
Connectors ! So what's the difference ??