switch that can take 7.4 v

[j2tgw]

Hi

I am going to use a 7.4 v lipo as a rec pack what switch would you guys recommend ?
I was going to use a standard spectrum switch but not sure if it would be heavy enough for the purpose ?
Any thoughts ?

Cheers Tom

[Grumpy]

The problem isn't the voltage but rather the current that large servos can pull that's the problem. Normal practice is not to use a switch, you just plug/unplug the Rx battery.

You should use a Y-harness that has two servo plugs that connect to the receiver and /or FBL controller. One plug cant take the current.

Like this:

https://www.modelhelicopters.co.uk/s...y-harness.html

[Vetequk]

I tried a number of switches including a switch which you run a magnet over to turn it on & off, I ended up fitting this Anodised Alloy External Flight Battery Arming Switch (T-Plug)

[tomatwalden]

The problem isn't the voltage but rather the current that large servos can pull that's the problem. Normal practice is not to use a switch, you just plug/unplug the Rx battery.

You should use a Y-harness that has two servo plugs that connect to the receiver and /or FBL controller. One plug cant take the current.

What he said! I use that Y-harness on my 700X with a 2S LIPO as an RX pack.

[Guest]

Looks to me like you're just adding another item in the supply line that can fail, you have another 4 unnecessary solder connections, both sides of the Deans and the bridge connection. Also you have to have another thing stuck to the outside of your model........din't see the point.

[Vetequk]

Once soldered I covered the joint in epoxy putty & I could not say weather it is necessary or not but is does work so far.

What I can say is that I have one model that I just plug the battery in on xt60 connect & because the battery is on the underside of the model it is sometimes awkward.

[_tj_]

The problem isn't the voltage but rather the current that large servos can pull that's the problem. Normal practice is not to use a switch, you just plug/unplug the Rx battery.

You should use a Y-harness that has two servo plugs that connect to the receiver and /or FBL controller. One plug cant take the current.

https://www.modelhelicopters.co.uk/s...y-harness.html

This is something I didn't think of.
I've been using my rx batt with a signal connection to my ikon fbl.

I shall be digging out a y lead to connect it now.
Thanks.

Glad I read this post.

[Planehazza]

Never used a switch myself. I always use EC3/Deans to two servo connectors plus an opti guard.

[Vetequk]

In my instance it was on the goblin nitro & I was not sure if it was ok to run the servo cable from front to back, so I ran 16awg to the back & soldered 2 servo leads on the end. As I did not want to keep taking off the canopy to plug in the lipo I just cut into the red lead & installed a T connector (a bullet connector would have worked too).

[Grumpy]

I shall be digging out a y lead to connect it now.
Thanks.

Glad I read this post.

Bear in mind that you shouldn't use a standard un-modified Y-lead because that still puts all the current through a single servo plug before splitting into two. If using a normal Y-lead use a heavy duty one and replace the 'common plug' (the one where both wires feed into) with a suitably rated connector (Deans, XT-60, EC3 etc).

[ROSSCO]

Have a look at the JR E-Switch with Deans connector, they are not cheap but they are a good switch.

JR Propo E-Switch D with W.S Deans Ultra Plug

[Grumpy]

That looks like a really well thought out switch, but £30 ..! I think i'll just keep plugging and unplugging.

[p1andy]

Have a look at the JR E-Switch with Deans connector, they are not cheap but they are a good switch.

JR Propo E-Switch D with W.S Deans Ultra Plug

+1. Never had any issues with these switches on my helis

[Rachel]

I use a JR heavy duty swith which i modify with 16 swg input wires and tw deacent silicone leads to the fbl,... I back this up with an optiguard, never had an issue
I have however witnessed several models die as repeated cycling of a deans , ec3, xt60 plug caused the wire to snap.....
obviously an optguard would take over and save the heli,....
now if only they had fitted one !!!!!!!!!!!!!!!

[j2tgw]

Thanks guys I think I like the looks of the jr switch Might be £30 but heli is a lot more .
So ive just ordered one from hobby plastics .see what like when it arrives
Thanks again for the help
Tom !!