Balloon Powered Radial Engine

Prints (0)

Description

Run by just blowing air into it. Demonstration:

Exploded view in 3d viewer: https://skfb.ly/6LQBR

If you like how it works, you can support me by purchasing the Pneumobile Chassis.

Extra parts needed: 

  • M3x8 Bolts (x15) 
  • M3 Nuts (x15) 
  • Thin Nitrile Glove (thumbs from M sized gloves worked the best) or Silicon (worse) or PET (not tested) ones

Optional parts: 

  • M3x12 or longer bolts (2x)(for the gears) 
  • M3 Nuts (x2)(for the gears) 
  • 6x4mm Silicon Pipe (can be found in aquarium shops) 
  • M5x10mm Washers (x2) (instead of printed ones) 
  • 105ZZ Bearings (x2) (noticed no difference in performance)
  • Printed well with 0.6 nozzle at 0.2 layer height. Some parts (Cylider_Back_Lid and Valve_Lid_6mm) need supports. After printing cut away the brims from Cylinder_Ring parts.

Printed well in PLA  with 0.6 nozzle at 0.2 layer height. Parts with "_support" in their names will print a bit prettier with supports. Parts with "X_" in their names are optional.

Assembly: 

  • Use 3d diagram as a guide: https://skfb.ly/6LQBR 
  • Cut off a glove finger tip (thumbs from M sized glove worked well) 
  • Pull it onto a Cylinder_Ring (Use Helper_Finger to leave enough height) 
  • Connect a Piston to it with two Washers 
  • Clamp the Cylinder_Ring between Cylinder_Plate and and Cylinder_Lid 
  • Clip them with Helper_Clamp so they won't fall apart at once 
  • Bolt them together to Plate_Top 
  • Repeat for the other 2 cylinders 
  • Insert th Crank with 2 Washers
  • Fix it in place with Frame_Bottom 
  • Bolt all the parts together 
  • Put the Valve_Inner in place
  • Bolt the Valve_Lid into place 
  • The engine should be running!

Troubleshooting: 

  • Rotated freely by hand, but struggling when working - the inner valve may have too much friction against the frame (sanding the valve and the frame may help for a while). 
  • Jams on a certain cylinder - this glove finger may need a bit more slack. 
  • Isn't rotated freely by hand - gears bolted too tightly to frame (should have a bit of play), some gear teeth didn't print very well, or the whole gear printed with "elephant foot" and runs too tight with another gear.

Design Files

File Size

Valve_Inner (supports).stl
248 KB
X_Crank_for_105ZZ_Bearing.stl
549 KB
Crank_Washer_M5.stl
64.5 KB
Crank_for_M5_Washer.stl
539 KB
X_6mm_to_Whistle.stl
825 KB
X_6mm_to_Tap_Water (supports).stl
543 KB
Cylinder_Plate (x3).stl
321 KB
X_Valve_Lid_Cartridge.stl
1.66 MB
X_2_Balloon_Cartridge.stl
1.68 MB
Piston (x3).stl
243 KB
Cylinder_Ring (x3).stl
120 KB
X_Valve_Lid_6mm_Flat_90 (supports).stl
1.02 MB
X_Valve_Lid_6mm_Flat (supports).stl
1.19 MB
Frame_Bottom.stl
496 KB
X_Valve_Lid_6mm_Vert (supports).stl
457 KB
X_Gears_1to8_2_Bevels.stl
739 KB
X_Pulley.stl
1.21 MB
Valve_Lid_Balloon.stl
1.23 MB
Gears_1to3_2.stl
879 KB
Gears_1to8_2.stl
843 KB
Frame_Top.stl
834 KB
Gears_1to8_1.stl
801 KB
Gears_1to3_1.stl
705 KB
Gears_1to2.stl
849 KB
Gear_Center.stl
273 KB
Helper_Finger_Height.stl
287 KB
X_Cylinder_Ring (02mm gap).stl
120 KB
Piston_Washer (x6).stl
77.6 KB
Cylider_Back_Lid (x3) (supports).stl
1.36 MB
Helper_Cylinder_Clip (x2).stl
560 KB

Comments

Your browser is out-of-date!

Update your browser to view this website correctly. Update my browser now

×