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Author Topic: Things I learnt in the weekend  (Read 584 times)

Offline Wynn Robins

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Things I learnt in the weekend
« on: September 13, 2009, 03:06:24 PM »
I finally got all the bits I needed to finish my ECL setup - so started to assembly everything - with a few mishaps .......  I have never really soldered anything before so it was quite an experience - anyway - what learnt

1: Deans connectors are VERY hard to solder 10 AWG wire too - and there is not a lot of space between the connectors !

2: A hot soldering iron  will easily go through the heat shrink on the battery wire you just soldered on and IS VERY conductive - soldering irons create BIG sparks when you touch them to both poles in a very ridiculous accident!!!

3: 14.8 volts batteries make pretty big sparks

4: Sparks make you jump - and your heart skip a beat 

5: Things get hot QUICK - and "helping hand" clips let go at the most inoppurtune moment.

6: Aluminium (aluminum) is also conductive (I knew this already, but did something REALLY dumb - DONT ASK!!!!! )

7: A 25watt iron is good for - NOTHING - and an 80 watt iron is TOO big for this application

8: I have a lot to learn, and you guys seem to make things look easy

9: I have greater respect for battery powered items.


hopefully it gets easier from here on
« Last Edit: September 13, 2009, 03:53:13 PM by Wynn Robins »
In the battle of airplane versus ground, the ground is yet to lose

Alan Hahn

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Re: Things I learnt in the weekend
« Reply #1 on: September 13, 2009, 04:22:18 PM »
Even though I solder on the battery when it is at about 50% capacity or so (how it comes from the vendor), I still feel like I am working with a live grenade!

I typically solder the positive lead on first, with the wire on the top side of the connector. This gives the biggest spacing between the two battery leads. Also I pre-tin both the pin and the wire, so it doesn't take too long to make the connection.

But I admit, I am not dealing with 10 gauge wire! That is probably pretty tough to deal with.

Offline Rudy Taube

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Re: Things I learnt in the weekend
« Reply #2 on: September 13, 2009, 07:32:33 PM »
Hi Wynn,

My heart goes out to you. When I fully converted to electric many years ago I was "solder challenged". I was always worried that my soldering would be the "weak link" in the planes systems. A friend told me to get some scrap parts and practice. This was good advise and now I find it very easy to solder and have not had any failures in over 9 years of flying electric.

There are many "How To" articles on the web.  Like Alan said, pre-tin is the most important. Your 25 Watt iron should be more than enough if you pre-tin both parts.

RE: the Deans Ultra Connectors, I have very good news! Go to your LHS and buy the end connectors that are made just for the blades on the Deans. They have a slot in one end and a female tube in the other for the wire. They are a perfect fit and make the job safe, neat and "easy". Your LHS may have them over in the RC car section. MPI makes them as well as other manufactures.

Another easy solution that I used before the above connectors became available is buying the pre assembled deans with wire extensions. It is much easier to just solder two wires together and avoid the deans plug. Here is a link for these. I think this link will also have the connectors too, call to ask.

http://www.hobby-lobby.com/charger_lead_with_deans_ultra_connector_302_prd1.htm?
pSearchQueryId=190084

I'm sure you already know this, but just a reminder to all. After you solder the red wire to the deans plug you "must" cover it with shrink tubing before you try to solder the black grd wire to the other spade of the deans. I then place a large piece of shrink wrap around the whole deans and about 1" down the wire to protect everything and this "soft" shrink wrap makes it easier to grip the plug while unplugging it from the male Deans.

Good luck and welcome to ECL. Your efforts will be rewarded with all the benefits of going electric!

Regards,  H^^
Rudy
AMA 1667

Offline John Cralley

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Re: Things I learnt in the weekend
« Reply #3 on: September 14, 2009, 09:40:31 AM »
See my post at this link (9/6/2009) re: deans connectors.

http://stunthanger.com/smf/index.php?topic=13894.0
John Cralley
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Central Illinois

Offline John Witt

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Re: Things I learnt in the weekend
« Reply #4 on: September 14, 2009, 02:03:42 PM »
Good safety point here. A battery is always live---NO WAY TO TURN IT OFF.

Always wear some eye protection and always cover any naked wires/terminals. Only uncover the lead/terminal you are working on. All metals are conductive. Always remove watches, bracelets and finger rings before working on your batteries.

Our batteries have very low internal resistance and can create large currents if shorted, even at low voltage. A burn around your finger can cause its loss.

This is aside from the other hazard issues of LiPo batteries.

My experience: 180 VDC 250 amp-hour packs capable of 1000 Amps

John
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Edmonds, WA
"Houston, Tranquillity Base here. The Eagle has landed."


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