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HelicopterMain Discussion › Are Fromeco batteries up to exteme 3d stick banging?
12-02-2007 11:01 PM  10 years agoPost 21
harmdive

rrApprentice

Colchester. UK

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Hi all

Well it took some time to get to fly the heli with the 5200 fromeco battery in and give it some grief. It seems that this has solved the problem. Really gave it a good thrashing and absolutely no problems. Tic tocs all directions constantly and no glitches at all. So... the message to all of you out there:

IF YOU RUN A REGULATOR WITH HIGH POWERED SERVOS FFEATURED IN THIS THREAD AND WANT TO USE THE FROMECO 2600mah BATTERY.....DON'T!!!

I hope this info has saved you lot one crash due to a rx battery that's not up to it. That said I'm still going lipo in the 90 with the added DC-Up just to be on the safe side!

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12-02-2007 11:15 PM  10 years agoPost 22
Yug

rrMaster

UK. Herts

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Finally, in testing with an intentionally under-rated 6 volt electrical system, we are able to show that a power system that would normally see voltage dips (for tiny fractions of a second) down to as low as 3.5 volts without a DC-Up device…never drops below 5.5V with a DC-Up installed.
Those are the same sort of results I was getting simply by using high power cable and deans. What I find questional about the DC-Up is it uses standard servo cable and connector; that in itself would be sufficient to degrade the performance of DC-Up by some margin. It would be much better inline at the point of power distribution.

Vegetable rights and Peace

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12-02-2007 11:21 PM  10 years agoPost 23
harmdive

rrApprentice

Colchester. UK

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Sounds like the whole radio set up needs to be looked at from all the manufacturers if the current going through them seems to be rising with all the new servos etc. they keep producing. Do they really test cables and connectors to see if they can deliver the amount of current that must be going through them in modern day 3D machines?

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12-02-2007 11:58 PM  10 years agoPost 24
Yug

rrMaster

UK. Herts

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Yeah it's a bit of a mish mash of old and new at the moment. Optically decoupled systems have been available for some time so as to allow the noisy and quiet electronics to be isolated but this stuff has mainly been targeted at larger planes. One aspect I like about the PDS2123 is a separate wire for supplying 7.2v. However it still means the ground lead on the standard 3 core servo cable is 'dirty'. Alongside the 7.2v input, there should ideally be a ground return. This would facilitate a noisy power bus and quiet power bus as is common in most electronic equipment. What with all these mega servos, DSM, liIons & regulators, our heli technology is shooting itself in the foot by hanging onto some outdated connection methodologies.

Vegetable rights and Peace

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12-03-2007 02:04 AM  10 years agoPost 25
ckoelliker

rrElite Veteran

St. Simons, GA

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I noticed on my 600N that when I moved everything the voltage would drop from 5.5v down to the mid 4v range. After experimenting, I ended up replacing the little servo plug lead out of my Fromeco 2600 with a deans plug directly into the regulator, then putting 2 outputs from the regulator to the receiver (I don't use switches). It made a huge difference, nothing I could do would get the voltage to drop until the pack was almost dead. Big improvement for about 10 minutes worth of work.
I apologize because when it come to the electrical aspect of this hobby, I am an idiot. So you replaced the standard servo connector from the battery to the regulator with a deans connector. Did you change the small wires as well? Also, are you then plugging both of the leads from the regulator to your receiver? And did you change the wires to these as well?

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12-03-2007 02:27 AM  10 years agoPost 26
electricdurango

rrVeteran

Sterling, VA

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So if I purchase the fromeco system I should pay the option for larger cable. I belive its only like 3.00.

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12-03-2007 02:31 AM  10 years agoPost 27
UCGC

rrApprentice

Colorado

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Yes.

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HelicopterMain Discussion › Are Fromeco batteries up to exteme 3d stick banging?
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