I want to get rid of the duct and replace with just the collar between the motor and prop
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I can do a quick CAD file for you, if you provide the critical measurements. A drawing would be helpful as well. You’ll need to get it printed elsewhere but there are commercial solutions for that. There are also some private people who provide inexpensive printing services via some websites.
I did that as well. I found one for the FlipSky 65161 6 bolt 65mm on the motor side to whatever the prop measurement is. .5mm gap between prop and spacer. Check my build for pics…
Received your dimensions, motor side will match motor dim. and prop will match prop dim.
Hub thickness will be 21.98mm and will not have a lip.
I noticed in your pics there is some kind of bushing on the motor side shaft opening is this necessary or can it be open enough for the shaft to have .5mm clearance. It might have been used to keep water out of the bearing area, just guessing…
Forgot to mention that you will have to use your duct hub as a drill template for your mounting holes. Your original machine screws will fit the new hub.
Here it is called “Prop fairing” or hub without duct, see @michion one between the Flipsky/Reacher 65151 motor and the FR propeller
'Fr 2019 motor system - #541 by michion
jkoljo - Thank you.
I very much appreciate you sharing the gifts of your intelligence, time, and skills to make my Lift efoil more efficient.
Your first file was test-printed over the weekend and was nearly a perfect fit in all dimensions… There were 3 minor edits that were needed. I look forward to trying the print from your most recently edited file on the Lift later today.
The cowl mainly has the forces of water on it, so it seems like an ideal part to 3D print.
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would you guys be willing to share that print? I’d love to try it out as well. Thanks!
Can you post the stl file? Thanks.
Does someone have the file?
Hey, do you still have the STL for this? I’m wanting to print a tail cone for my Lift and this would be a huge help.
Here are the v2 design, step, solidworks and stl files. Sorry for the delays, I have been working on moving to another country and changing jobs 
https://drive.google.com/folderview?id=1Jz9EVfbw4hE5ttKHEl4US7lLWrNtDRdM
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Looks like exactly what I need to remove my Lift prop guard and still have good flow. But the link does not work now and I cannot find it on Thingiverse for the 3d print files. Anyone have a working link to the files? Thanks.
A tail cone is the perfect entry point into 3d CAD and then printing.
A few Fusion tutorials, some callipers and in a couple of hours you would have your own one.
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If you aren’t going to use the Lift guard anymore just cut the vanes off at the hub and smooth them off flush with the cone.
Looks like this link is dead, anyone got a copy of the .stl?
I designed one but I’m on Holidays until the end of the month and have no access right now. I can share it once I’m back.
Cool no stress I might try Designing my own too. Lmk if you have tips. Was thinking of using rapid petg.
I uploaded the file again, try this link:
You can 3D print one but make sure you transfer and fit the carbon seal from your original prop guard to it. Otherwise your motor will get water inside mixed with the oil and will eventually fail. That is why it’s better to just chop off the stand offs of the prop guard cage from the one you have assuming you wont ever use it again. If you really want protection get the lift jet.