This is my second one of these flight controllers. After contacting lefeirc about the problems I was having updating the firmware and not being able to ARM the motors in VTOL mode, they were very helpful. The Manual needs to be changed to show how to ARM the motors as well as a little more detailed instructions for updating the firmware. The motors are ARMED in VTOL mode by moving both sticks down and out and keeping them there until the motors spin up for a split second. You then move the throttle up past 1/2 and the motors will run. The problem is that when you move the throttle down to 1/2 throttle the motors will shut off and not at the same time. I have asked them to update the firmware so that the throttle has full range and not just the upper half of the range. When updating the firmware you need to follow these steps; Do not have the FC powered up with the flight battery. Down load the SN_FAST_V57 from the lefeirc website. Plug in the USB to your computer. You should see a drive show up, on my computer it was Drive E. Copy the update file to the drive that showed up. Be sure that the name of the file only says SN_FAST and not SN_FAST_V57, otherwise the FC will not recognize the file. Unplug the USB cable and then plug in the flight battery. The FC will update and delete the file from the Drive and then go into its normal start up sequence. If you unplug the battery and plug the USB back in you will see that the Drive has no file in it. I have had a thread started in RC Groups for this FC, so go there if you have questions, or need more information. https://www.rcgroups.com/forums/showthread.php?4226367-Lefei-SN-FAST-Flight-Controller-Support-OSD-Y3-Vertical-Take-off-And-Landing

This is my second one of these flight controllers. After contacting lefeirc about the problems I was having updating the firmware and not being able to ARM the motors in VTOL mode, they were very helpful. The Manual needs to be changed to show how to ARM the motors as well as a little more detailed instructions for updating the firmware. The motors are ARMED in VTOL mode by moving both sticks down and out and keeping them there until the motors spin up for a split second. You then move the throttle up past 1/2 and the motors will run. The problem is that when you move the throttle down to 1/2 throttle the motors will shut off and not at the same time. I have asked them to update the firmware so that the throttle has full range and not just the upper half of the range. When updating the firmware you need to follow these steps; Do not have the FC powered up with the flight battery. Down load the SN_FAST_V57 from the lefeirc website. Plug in the USB to your computer. You should see a drive show up, on my computer it was Drive E. Copy the update file to the drive that showed up. Be sure that the name of the file only says SN_FAST and not SN_FAST_V57, otherwise the FC will not recognize the file. Unplug the USB cable and then plug in the flight battery. The FC will update and delete the file from the Drive and then go into its normal start up sequence. If you unplug the battery and plug the USB back in you will see that the Drive has no file in it. I have had a thread started in RC Groups for this FC, so go there if you have questions, or need more information. https://www.rcgroups.com/forums/showthread.php?4226367-Lefei-SN-FAST-Flight-Controller-Support-OSD-Y3-Vertical-Take-off-And-Landing

This is my second one of these flight controllers. After contacting lefeirc about the problems I was having updating the firmware and not being able to ARM the motors in VTOL mode, they were very helpful. The Manual needs to be changed to show how to ARM the motors as well as a little more detailed instructions for updating the firmware. The motors are ARMED in VTOL mode by moving both sticks down and out and keeping them there until the motors spin up for a split second. You then move the throttle up past 1/2 and the motors will run. The problem is that when you move the throttle down to 1/2 throttle the motors will shut off and not at the same time. I have asked them to update the firmware so that the throttle has full range and not just the upper half of the range. When updating the firmware you need to follow these steps; Do not have the FC powered up with the flight battery. Down load the SN_FAST_V57 from the lefeirc website. Plug in the USB to your computer. You should see a drive show up, on my computer it was Drive E. Copy the update file to the drive that showed up. Be sure that the name of the file only says SN_FAST and not SN_FAST_V57, otherwise the FC will not recognize the file. Unplug the USB cable and then plug in the flight battery. The FC will update and delete the file from the Drive and then go into its normal start up sequence. If you unplug the battery and plug the USB back in you will see that the Drive has no file in it. I have had a thread started in RC Groups for this FC, so go there if you have questions, or need more information. https://www.rcgroups.com/forums/showthread.php?4226367-Lefei-SN-FAST-Flight-Controller-Support-OSD-Y3-Vertical-Take-off-And-Landing

Excellent flight controller, recommend it 100%. Thanks for the quick shipping!

Excellent flight controller, recommend it 100%. Thanks for the quick shipping!

Excellent flight controller, recommend it 100%. Thanks for the quick shipping!

Very small and light. It does not come with the plug-in cable in the picture.

Very small and light. It does not come with the plug-in cable in the picture.

Very small and light. It does not come with the plug-in cable in the picture.

super fast delivery, great product, complete package fits

super rasche lieferung, tolles produkt, gesamtpaket passt

super fast delivery, great product, complete package fits

All right, will be back.

Alles ok, werde wieder.

All right, will be back.

Looks to be a very good flight controller with everything supplied. Have yet to fit it to a model but as with anything from Banggood I expect it to work excellently.

Looks to be a very good flight controller with everything supplied. Have yet to fit it to a model but as with anything from Banggood I expect it to work excellently.

Looks to be a very good flight controller with everything supplied. Have yet to fit it to a model but as with anything from Banggood I expect it to work excellently.

Deliver as promised.

Entregue conforme prometido.

Deliver as promised.