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HomeMy Site✈️Aircraft🚁HelicopterHelicopter Main Discussion › Had anyone tried this???
04-01-2013 06:39 AM  6 years ago
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tomvuong74

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NE helicrew

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Had anyone tried this???
Most of my TP, Hyperion packs are puffing crazy... As I know Thor, Pulse, Gen Ace are Aluminum sheet installed both side to protect and cooling.
Few say ago, I did carefully open my new TP 4400 6s 45C and installed 2 Aluminum sheets that I bought from Home depot and clear heat shrink it.
Today after 5 breaking and 5 3D flights... wow the pack are solid like a brick and little warm but not hot.. after every flight..

TRY IT>> YOU WILL LOVE IT.

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04-01-2013 06:56 AM  6 years ago
Wave

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Illinois

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How does that solve the problem that your packs are trying to tell you something ?
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04-01-2013 10:19 AM  6 years ago
wrongler

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Brewerton, New York

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This could get interesting.Bill Whittaker
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04-01-2013 12:31 PM  6 years ago
icanfly

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ontario

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nice heat diffuser, that's why
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04-01-2013 12:41 PM  6 years ago
chris6414

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Sneads Ferry, NC USA

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I used to always cut the sides of the packs heat shrink away to allow better air-to-pack contact to help a little. Same with ESCs. If the heat sink is not exposed to the air it is useless. If your packs are puffing you are drawing too much current and over heating them. Packs, motors, and ESCs should only get moderately warm and never hot. Extreme heat kills Electric Helos and their componentsCentury Hawk Sport, OS .32, Futaba 7C, GY-601 9251
Predator Gasser SE G-23, Fut 3010 servos, JR gyro/servo
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04-01-2013 03:38 PM  6 years ago
Mike Fortin

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USA

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Aluminum plates do nothing to stop puffing, they do however help in the event of a crash and offer a bit more protection.

If a cell is going to puff, it doesn't matter which way it goes but putting it under additional pressure...well.... BOOM.
Have Rotors, Will Fly!
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04-01-2013 06:11 PM  6 years ago
icanfly

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ontario

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you might not see what is taking place around a battery while it's discharging quickly during operation but it is a process of de-ionization at the atomic scale. Similar to static from high voltage wires there is static electricity around the pack as it discharges, the positively charged lithium molecules are diffusing extra ambient electrons which leap out of the lithium molecule in the process. They are source of HEAT, and ground out on the plate before they accumulate at the solder joint to the wires which is their only path out, of least resistance (the motor will diffuse the charged electrons completely to an orbit away from the motor into the air molecules around it creating Ozone).

You don't have to see it but like a magnet it, Electrons, are there and interfere with rf signals.
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04-01-2013 08:56 PM  6 years ago
bricktop

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gone

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LOL...that's great!!!

that's it... i've had enough.....im putting a solar engine on my heli

perpetual motion generator. i'll put a capacitor on the heli you can charge up to use as a soft start to your 6 pole motor that will be gear inducted to a 12 pole motor that i've converted into an alternator which will in turn keep the capacitor charged and allow your 6 pole motor to also turn your rotor head. an overunity device. the only downfall of my plan it the drag created by the blades which is the need for overunity to create horsepower.....right?

i guess you could make your main shaft the armature for your generator...then theres no need for an external component...you're killing two birds with one stone and fly non-stop forever.

how cool would that be!!!
I didn't say you did it...I said I was blaming you.
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04-01-2013 11:04 PM  6 years ago
GetToDaChopper

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Las Vegas , NV

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R/C cars are made to use hard shell lipos for racing and there doesn't seem a problem with any kind of BOOM using them ?    ▲
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04-01-2013 11:06 PM  6 years ago
JKos

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Redondo Beach, CA

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Is it fair to say the only reason we don't use hard packs in helis is due to the extra weight?

- John
RR rules!
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04-02-2013 01:47 AM  6 years ago
icanfly

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ontario

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perpetual motion generator.
someone (and a few others) here on rr is using a bl motor to supply dc to the electronics on a fuel heli.

the weight of a over-unity system might become an issue.

Suppose you had an electric heli with another motor on the gear acting to generate electricity to the system, that's essentially what you have.

Could work, aluminum is a conductor, there's room for experimentation, Brick, keep up the stoke.
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04-02-2013 05:10 AM  6 years ago
ICUR1-2

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Ottawa, Ontario

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Metal plates bad idea on the inside of bp's, it could short out in a crash
maybe on the outside using heat sinks like the car packs use.

kind of useless though, if you do your set up right the battery won't get hot.

back in the day
they used plastic seperator between cells

I guess competion for the smallest and lightest battery made them stop using the spacers

spending time, paying attention
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04-02-2013 08:58 PM  6 years ago
GetToDaChopper

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Las Vegas , NV

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most R/C car packs that i've seen are plastic cases....
I guess competion for the smallest and lightest battery made them stop using the spacers
that also why you don't see anyone using R/C car type packs in helis, because heli packs are smaller and lighter without the hard case.....

I believe that R/C cars are easier on lipos because they are only using part throttle most of the time were are heli are set at 80% all the time more or less, i would thing that R/C cars would be much harder on ESC than helis though.....
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04-02-2013 09:02 PM  6 years ago
JKos

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Redondo Beach, CA

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> because heli packs are smaller and lighter without the hard case.....

With the massive power available today, guys sure don't seem to care much about weight. Have you seen the weights posted for some of today's hot helis?

> I believe that R/C cars are easier on lipos

Yeah, I don't know what a typical run time is for them. Obviously it's going to vary a bit just like it does for us.

- John
RR rules!
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04-02-2013 09:04 PM  6 years ago
hootowl

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Garnet Valley, Pa.

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Suppose you had an electric heli with another motor on the gear acting to generate electricity to the system, that's essentially what you have.
Not another fkin perpetual motion idea.... paaaaaaaleese LOL
Wolves don't lose sleep over the opinions of sheep
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04-02-2013 09:06 PM  6 years ago
GetToDaChopper

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Las Vegas , NV

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sorry JKos i beat you to it ! lol     ▲
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04-02-2013 09:17 PM  6 years ago
JKos

rrProfessor

Redondo Beach, CA

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I just compared two packs of the same brand. They don't have exactly the same pack specs for hard and soft, but here's at least something to compare.

Hard pack: 4S 5000 mAh, 55C, 576 g
Soft pack: 6S 5300 mAh, 35C, 785 g

So, for a 12S config, the hard packs would be 158 g (5.6 oz) heavier with 300 mAh less capacity but a higher C rating.

- John
RR rules!
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04-02-2013 11:20 PM  6 years ago
RyanW

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Edmond, Oklahoma

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I believe that R/C cars are easier on lipos because they are only using part throttle most of the time were are heli are set at 80% all the time more or less, i would thing that R/C cars would be much harder on ESC than helis though.....
Exactly the opposite. R/C car guys (both bashers and professionals) abuse battery packs.

The pros will override the low voltage cut-off. They do this to prevent a cut-off during the heat of battle in a race. They would rather smoke a pack than have a DNF.

The basher just runs the car until it won't move any longer. If the factory or aftermarket ESC doesn't have the low voltage cut-off set properly, they will over discharge the pack and there she goes.

The hard packs are a result of the above mentioned items and also to reduce the chance of them getting 'speared' in a crash. A carbon plate frame going 50+ mph will easily pierce any LiPo pack.

The sanctioning bodies for the r/c car world made hard cases mandatory.
-Ryan
Mikado USA, Kontronik, Opti-Power, MKS Servos
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04-02-2013 11:50 PM  6 years ago
icanfly

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ontario

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the plates have a twofold effect, containment and containment.

A little added weight, worth it? uhh?

Hmm, heat is resistance, heat is loss, heat is.........fire.
Do you suppose anything to lessen the negative effects of heat might be a good thing? Electricity flows best in cold temperatures,

Keep it cool. Cool motor, cool battery, cool esc, 2 out of 3 would be fine by most.

Perpetual machine? Something to extend flight times anyway, (to be discussed in another topic). It would be best to test something first, lots of links and info out there.
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04-03-2013 01:27 AM  6 years ago
GetToDaChopper

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Las Vegas , NV

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Exactly the opposite. R/C car guys (both bashers and professionals) abuse battery packs
i said nothing about going past the 20% left in the pack aspect of use, i only spoke of normal use of a lipo battery, now if it's common place for R/C car pros to run a pack past 20% left then that's something else.......
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