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Can I use an ESC & LIPO for BEC only?

Using an electric motor set up without the motor

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David Ramsden01/07/2020 00:05:15
27 forum posts
13 photos

This might sound silly (I'm new to this). I'm creating a normal motor/esc/bec/lipo set up in a glider. I've built interchangeable noses - one with a motor and one without. Question is, when I remove the motor and head off to the slope to enjoy some silent flight, will the esc and lipo be happy just powering the receiver via the bec lead?

Geoff S01/07/2020 00:51:52
3669 forum posts
26 photos

I've never done it but I can't see problem other than that you'll be carrying more weight than necessary.


trevor wood 201/07/2020 01:31:09
47 forum posts
48 photos

I've got a couple of 2 metre gliders where the Rx and servos are powered by a 2s lipo fed through the BEC of an old brushed ESC. They've flown for 2 or 3 years without problem I can't see weight being an issue on your installation as you will have to instal some church roof to sort out your CG when the motor is removed.

Steve Colman01/07/2020 05:32:23
784 forum posts
457 photos

I've done the same too with no problems.

Frank Skilbeck01/07/2020 07:48:48
4736 forum posts
101 photos

Make sure the wires to the motor can't short .

Anthony Scott 201/07/2020 08:37:26
101 forum posts
9 photos

Why remove the motor? It is good insurance!

David Hall 901/07/2020 09:06:17
267 forum posts
16 photos

As already suggested, provided the open leads can't short, it'll be OK.

This is the way I bench test radio gear, all hooked up but without a motor.

Cuban801/07/2020 09:36:04
2961 forum posts
1 photos

How about keeping it simple? Disable the motor by disconnecting it via suitable connectors (will have to be done anyway, with a detachable nosecone) and then use a rubber band to hold a folding prop closed tight to the fuz, or if a fixed prop, just take it off and replace the spinner with a suitable spacer?

This is usually sufficient to satisfy the requirements of most silent flight only sites, but I have heard that some will pedantically insist on a complete no power rule even if the installation is totally disabled.

David Ramsden02/07/2020 21:37:32
27 forum posts
13 photos

Many thanks to Geoff, Trevor, Steve, Frank, Anthony, David, and Cuban8.
The reason I made an alternative nose is that I don't want to risk damage to a £40 motor if I'm not using it. My local slopes are 'Tors' topped with massive lumps of granite. The change over is just two screws and the non-motor nose is weighted to match the weight of the motor. Good point about insulating the motor leads! I might not have thought of that.

PS I tried to add an image to this post using 'Insert image from album' but it doesn't allow me to browse my folders. Shame.

PatMc02/07/2020 22:42:13
4409 forum posts
530 photos

David, I don't think that you have created an album. There should be "n photos" under the number of forum posts you've made if you had.

Have a look at this thread that explains creating an album.

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