L064H037 V0.2 LiPo Crash Protector Cage for drone frame

INTRO

Name of the design: Sugalime3D FPV L064H037 V0.2 LiPo Crash Protector Cage

It can be used on the Mirro35 drone frame or almost any other 3-4" drone frame, though the arches (bows) might not be able to be spread quite as wide. The more rectangular the top plate is, the better, and the more securely and stable the cage sits on.

TIMELINE

* Initial publication date: June 16, 2026

PURPOSE OF IT

Reducing the risk of a LiPo damage and LiPo fire because of a drone crash.

It's actually questionable that so many people take the risk of their LiPo batteries being subjected to impacts from crashes. They're basically playing with the fire. Damaged LiPo batteries can catch fire later while charging or even spontaneously in storage. They endanger their own lives and the lives of others in the house building. The property is also at risk and therefore also financial risk as a result.

A burning LiPo battery can destroy your drone. Tell me, how do you safely remove a sparking LiPo from the drone ? And then, do you just leave the burning LiPo there because you can't put it in your backpack or car ? Leaving it behind is illegal and—depending on where it’s left—could start a forest fire...

SELECTED POSTS SOCIAL NETWORK (NEWER TO OLDER)

https://www.tiktok.com/@sugalime3d_fpv/photo/7651990681170251030

SPECS

Compatible LiPo sizes:

LiPo battery with it's straps and the Lipo pad max dimensions is: 64 mm in length, 37 mm in height.

However, you also need to consider or select the right size so that the cables come out properly through the cable opening...

Compatible examples Year 2026 (No guarantee !):

* LiPo 4S 850 mAh for example in 60 x 32 x height 32 mm

* LiPo 4S 750 mAh for example in 60 x 31 x height 27 mm

* LiPo 4S 650 mAh for example in 61 x 31 x height 22 mm

Not compatible examples Year 2026 (No guarantee !):

* LiPo

CARBON FIBER THICKNESS:

The bows are 2,0 mm

The side plates are 1,5 mm

Weight of the whole cage incl straps: Approx 20 - 30 g (depending on number of bow config, used straps, used material for standoffs and screws...)

NUMBER OF BOWS CONFIGURATION & STANDOFFS

You could also leave off the side plates. However, keep in mind that something (like a tree branch or a thin post) could still strike the LiPo from the side; since the LiPo only has reinforced plates on the top and bottom, it is vulnerable on the sides, front and rear.

STANDOFFS:

For M2 Standoffs D4 (or D3,5)

Length: It depends on your existing top plate of your drone. You need to find out yourself...

Here for Mirror35 drone frame:

STANDOFFS FOR 4 BOW CONFIG:

If you have a 45° tilt, there are 2x "bow cam tilt" in the middle.

...

STANDOFFS FOR 3 BOW CONFIG:

If you have a 45° tilt, there are 1x "bow cam tilt" in the middle.

Middle part: 11,5 mm (or smaller) in length.

Outer part: 2,5 mm (or larger) in length,

STANDOFFS FOR 2 BOW CONFIG:

If you have a 45° tilt, there are 0x "bow cam tilt" in the middle.

Middle part: 24 mm (or smaller) in length.

Outer part: 2,5 mm (or larger) in length,

If the drone is at XX g without cage and 450mAh Lipo. With the LiPo Crash Protector it is approx XX % heavier.

But keep in mind that many pilots, especially Bando pilots, mount a TPU horn at the front to protect the LiPo battery. TPU is very heavy. Presumably this kind of TPU protector is just as heavy, but doesn't protect the LiPo as well as this LiPo Protector Cage. So overall this cage is the better solution in my opinion.

CNC SERVICE

You can give the CNC service the STEP files; it contains all the information, including details about the plate thickness and chamfers.

CARBON FIBER PLATE ROTATION:

Should be good. It doesn't really matter that they're mostly right angles. The CNC manufacturer should normally position them correctly using this STEP files.

FILLETS:

The fillets are always chosen to be as large as possible (better for durability) and never have a radius below 1.00 mm (milling heads have a minimum limit...).

CHAMFERS:

The chamfers are important to prevent the electric cable, the LiPo strap or your skin from being cut. The CNC service typically creates the double sided chamfer using a special drill head (buck side chamfering) that first makes the chamfer on top then on the bottom, or they use a high accuracy plate turning process.

Public example of buck side chamfering

https://www.youtube.com/shorts/9M66unswJ7c

GUARANTEE

It is a prototype V0.2 in open beta !

This version is the first version i will order at a CNC service. Use at your own risk ! I guess it should work. However, it has not been tested yet. Big and/or small errors are possible. The design is still in the prototype phase. I have not ordered and tested the part through a CNC service yet. Therefore, the part may still be revised and then appear as V0.5 on a new page. Maybe tests will be successful and this will be the final version.

THE FRAME IN THE PICTURES AND ASSEMBLY FILES

If you like it. Here it is:

Mirro35 V0.3 drone frame:

https://www.thingiverse.com/thing:7365972

DEVELOPMENT FUTURE

Planned changes for the next version:

Non so far

DEVELOPMENT HISTORY

Changes from V0.1 to this one the V0.2 (Since these are also feature updates, it became version 0.2 rather than 0.1.1.)

* All chamfers were changed from 0.25 mm to 0.3 mm, except for the holes in the side plates, which were changed from 0.25 mm to 0.2 mm.

* V0.2 also features a "Slow" side plate. The advantage: it is more robust and shouldn't bend under the tension of the strap—which, among other things, can also help minimize oscillations and vibrations. The disadvantage is that it is slower and more fiddly to attach the protector, as you have to guide the cable through the hole with your fingers. Another potential disadvantage of the "Slow" side plate is if your frame's wheelbase is too short. This is because the side plate arm requires space in the area where the propeller is usually located—so it only works if you have enough wheelbase or clearance...

* Since you will likely use just one large strap in the middle, there is now a small cutout for the strap in the side plate; the main advantage of this is that the strap bends at a shallower angle, thereby minimizing the risk of it being cut.

PREVIEWS VERSIONS:

L064H037 V0.1 Ultralight edition LiPo Crash Protector Cage for drone frame

https://www.thingiverse.com/thing:7367110

L064H037 V0.1 LiPo Crash Protector Cage for drone frame

https://www.thingiverse.com/thing:7366760

COPYRIGHT & CREDITS

PRIVATE USE:

You are allowed to download and copy and modify the frame for private use and upload and publish a CAD mod/remix with credits (My name and the link to this one); please note the license terms specified below. For non-commercial purposes, i.e., hobby videos or picture in the internet, me or the name of the frame I don't expect to be mentioned in videos or pictures or description. However, I appreciate it if you mention the name of the frame and the designer in the vid/pic itself or description.

COMMERCIAL USE:

I permit to download and use and copy and modify for commercial sales. However, I expect the designer name and product name to be mentioned in the title or description of the product with the product name: "L064H037 V0.2 LiPo Crash Protector Cage" or "L064H037 V0p2 LiPo Crash Protector Cage"and the designer name :"Sugalime3D FPV" or "Sugalime3D FPV design" or "designed by Sugalime3D FPV".

Example: [Your Brand] Sugalime3D FPV L064H037 V0.2 LiPo Crash Protector Cage