Power jack for your slope plane - RC Groups
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Dec 26, 2002, 02:09 AM
stegre's Avatar

Power jack for your slope plane

For those of you who might be interested, and who might not already know how to do this, I have placed instructions on my website:



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Dec 26, 2002, 11:43 AM
around Colombia
ShredAir's Avatar
Steve et al.,

Please see also http://shredair.com/knick.html

Dieter Mahlein
Dec 26, 2002, 01:20 PM
Registered User
TFLG's Avatar
Yes those can be pretty slick. But if you do install one make sure to well insulate all the connections (apply heat shrink over all solder joints!). I have seen 3 different guys catch their planes on fire using these. The planes did not burn up but the wiring did fry and a whole lot of smoke came pouring out of the planes. It's especially important on foamies where there is a lot of flexing.

Dec 26, 2002, 02:26 PM
stegre's Avatar

Power Jack

Brian, I agree. there is a good amount of current drawn and people must be very careful ! I am specific about using heat shrink on the solder joints, it is a must.

It looks as if ShredAir has nice ones already completed. The price is good considering the amount of effort to make one.

I put the info up for the do-it-yourselfers like me who just like to make neat accessories.


Dec 26, 2002, 06:29 PM
around Colombia
ShredAir's Avatar
As far as I know, Rich Hollyday of Hollyday Designs pioneered these, or at least brought them into the spotlight. I have been using them or years, and when Rich decided he didn't want to make them anymore, I obtained his permission to have them assembled here in the Northwest, using the same care and high-quality components he used ot use.

Dieter Mahlein
Dec 26, 2002, 08:50 PM
bjaffee's Avatar
The Hollyday/Shredair ones are the only ones I will use on a normal sized (non-HLG) glider. I've heard too many horrer stories about the non heavy duty type or home made switch jacks failing.

Personally, I like to avoid the switch jacks altogether, unless there's no other option (such as on the Opus V, which has no hatch or removable nose cone). On my combat wings and warbirds, I usually just use an aileron extension to turn the rx on or off, and charge it as well. I never had a problem with one getting unplugged or damaged in flight.
Dec 30, 2002, 01:53 PM
Lifes 2 short, go sloping
[i]On my combat wings and warbirds, I usually just use an aileron extension to turn the rx on or off, and charge it as well. I never had a problem with one getting unplugged or damaged in flight. [/B]
I also do this with my flying wings and delta wings with good success. but I have seen the Power jack in action and it is slick.
Jan 01, 2003, 10:36 PM
Whadda YOU lookin' at?
CactusJackSlade's Avatar

Amp draw on switch jacks

Be sure you get the correct switch jack size for the application -

Micro for 2 or 3 small servos the standard for more than 3 or large servos... the weight difference is neglegible. I think the micro is 1 amp and the std is 5 amp rated.

Here is the page on this subject at Hollyday designs:

Go to the directions page for detailed info.

I have several switch jacks of both sizes and so far so good. Here are photos of an install:


As long as they don't cause a problem, I'm sold.

I have heard that you DO NOT want to use the cheapo ones from Radio Shack - they are not rated the same and the quality is definitely lacking - get them at Mouser Electronics!

Also be aware that the wiring for the mini and the standard is DIFFERENT - and that page is no longer poste by Hollyday.

Jan 02, 2003, 03:18 AM
stegre's Avatar

Switch jack

Again, I would highly recommend using the exact Switchcraft DC power jacks and plugs shown on my page (see post above).

I am quite hesitant to use anything smaller due to the possiblity of rapid current draw. Cheapo jacks and subminiature jacks may cause you to see smoke (literally)!

This is an effective way of managing your power and charging needs, but do not take shortcuts. The good components are worth the price.


Jan 03, 2003, 04:21 AM
Whadda YOU lookin' at?
CactusJackSlade's Avatar

Link up?


I have a similar page on my website... but I like yours much better! I did not go into the detail like you did. I love these babies and would like to share the info - whether they build them themselves, or buy them pre-made. Would you mind if I linked to your site?

Here's my switch-jack page:


I know how much work taking all those photos is, so if you'd rather me not I understand!

Let me know on my personal email: