Concept E-CX5 Electric F5K Glider Review

Let's see what this F5K E-CX5 can do! It's a 1.5M electric sailplane from Concept and it can use your CX5 DLG wings!



I've been hearing more and more about F5K and when Concept released an electric fuselage for the CX5, I was immediately excited to try it out. I got one on order along with the new CX5 Pro fuselage which I do an article on later, but I got the electric fuse and parts in and wanted to share my thoughts and experience with it. I haven't flown an F5K competition yet, but I'm looking forward to being able to do that as the new format grows.



There wasn't a lot to do here since I am using one my CX5 wings. I just needed to get the fuselage setup with the electronics. I used the 3D printed servo/ballast tray from Rollo, KST X08H servos, an 1806 2300kv motor and a Castle Creations Talon 15 ESC along with some 2S ~400mAH lipo batteries. Here are some photos and text showing the install.


It flys just like a CX5! All the same handling characteristics, speed and penetration you know and love is still there. The main difference is the vertical stab is taller and a different shape from the hand launch version. The E-CX5 has an even tighter turning radius which means you can core small low level thermals easier. Flying weight on mine came out to 290g and it flys great at that weight. With the option to add ballast, it can handle just about any condition you'll encounter.

I'm still working on the power system. The 6x4 prop and a 2S 300maH lipo on the 1806 2300KV motor is enough power to climb out and fly on, but it's not powerful enough for my liking. I changed the prop to a 7x4 and that helped out a lot. I think I will stick with this motor and run a 3S lipo when it's windy and a 2S lipo in calmer conditions. I'm excited to go fly an F5K competition now. I can also see myself taking this with me on vacations to visit slope sites as I like having the ability to power up and save the plane if the wind dies. I'll have my E-CX5 in Florida at the end of April for the USA Team Selects so be sure to stop by my tent and check it out.



The bottom line here is the E-CX5 flys every bit as good as the hand launch model with all of the same great handling and aero benefits of the CX5 wing design. The quality of the fuselage, fit and finish are all top notch. It's going to be a very competitive plane in F5K competitions and a perfect companion for those low launchers out there to fly mixed launch F3K at smaller regional events that allow it. Soaring USA carries these now along with the F3K CX5 and both versions are available for $999. Go get you one!

Check out the Concept CX5 F5K at Soaring USA Review Policies

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Last edited by Jason Cole; Apr 20, 2021 at 07:41 AM..
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Apr 20, 2021, 09:47 AM
Hi Jason,
What brand of spinner and folding prop are you using for the E-CX-5

Apr 20, 2021, 09:51 AM
RCG Admin
Jason Cole's Avatar
Thread OP
It's the CN 25MM F5K Spinner and CN Slim Carbon blades.
Apr 20, 2021, 12:01 PM
ThomasLee's Avatar
Jason, before swapping out the motor I'd recommend trying a 20A - 30A ESC first. That motor/prop should give take you well over the 60/70m launch heights in the 7 seconds.
Apr 20, 2021, 12:05 PM
RCG Admin
Jason Cole's Avatar
Thread OP
It’s not being limited by the ESC currently. I think it’s really just right for non ballasted on 2S and 3S when the wind picks up. Should be plenty, but I’ll have a better idea after we actually have a competition.
Apr 20, 2021, 12:22 PM
ThomasLee's Avatar
Looking forward to seeing more F5K or mixed events in the US! Sweet model
Apr 20, 2021, 01:40 PM
Registered User
Very cool!! Looking forward to seeing it in a few weeks.

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