Shock Absorbing Landing Gear for Retractable (Version.1 3DPrinter spring version)

STORY
Shock Absorbing Landing Gear
Flying in the rain
link

• I bought an XFly's A10 and have been flying it happily ever since. But there are three things I want that are missing.

1. flaps: I made this because I wanted to practice landing with flaps.
2. rudder: I want to modify the landing path with the rudder.
3. retractable shock absorber landing gear : I found a 25 gram retractor on the internet that can be used for small airplanes. However, I was unable to find a shock absorber landing gear to use with it.

So I made my own shock-absorbing landing gear and it works great.

I made a version that uses two types of springs,
Version 1. using a spring used to adjust the belt tension on a 3D printer
Version 2. using a normal coil spring

ADVANTAGE
* The retractor can be removed from the bracket when it malfunctions.
* Applicable to 50mm to 64mm RC airplanes without retracts.
* Folds forward to favor hard landing (if hard landing causes the strut to bend, the forward fold will still work)

Things to buy

1. Retract - 25g
   link

2. Spring
   Used for Belt of 3D Printer
   link

3. Shaft (Carbon fiber rod or Steel)
   Needed diameter 3mm
   Steel is more recommended
   You have to cut this.
   for Nose : 41mm
   for Main : 54mm

• carbon
  link

• Steel (like 3mm push rod )
  Have to buy for rc-airplain with highly elastic steel in rc-shop.

  • Saw to cut steel rods link

Useful tools (Option)

knife
link

Mini grinder

link

How to assemble
* Requires glue, M2 bolts, and a pushrod for steering
1. Place the bracket on the bottom of the foam airplane and draw an outline.
2. Cut out and dig the outline to make room for the brackets.
3. Insert the bracket and glue it in place.
4. Assemble the shock landing gear to the wheel (3mm rod is required) and insert it into the retractor. (The length of the shock can be adjusted to a certain extent by the length of the rod / glue makes it more rigid, but the lower part cannot be used because it needs to move up and down along the rod.)
5. Bolt the retractor to the bracket.
6. For the Nose gear, drill and glue a server spot in the fuselage of the foam machine and connect it with a pushrod.

If you have questions, feel free to ask me.
If you enjoyed, please click 'FOLLOW' or 'LIKE'.

PLA Recommendations

1. Landing gear parts with wheels (Not tires):
- regular PLA (Over strength better).

Printer Settings

Printer: TwoTrees Saphire plus
Wall, Upper/Lower : Over 1.2mm (3 line of shell)
InFill : 50% or over
Temperature/Speed: Depending on your PLA and printer
Support : Anywhere (Overhang : 65 degree)
Build plate type : Over brim (depending on the bed condition of your printer)

2. Tires :
- Flexible like TPU-PLA .

Printer Settings

Printer: TwoTrees Saphire plus
Wall, Upper/Lower : Over 1.2mm (3 line of shell)
InFill : 10% ~ 20
Temperature: 230
Speed : 10 ( In case of Direct-Extrude, 20 is possible)
Support : No
Build plate type : Skirt

• Note TPU has more difficult to remove supports from main-objects.