Line 59: Line 59:
# saves the user from hand wounds  
# saves the user from hand wounds  
# [https://www.ebay.com/i/113882534709?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=113882534709&targetid=596843727278&device=c&mktype=pla&googleloc=9017741&poi=&campaignid=2086087905&mkgroupid=76935344123&rlsatarget=pla-596843727278&abcId=1141016&merchantid=138167212&gclid=EAIaIQobChMIkdTsg6id5gIVkYbACh39swz8EAQYAiABEgJEHvD_BwE Closest Commercial Equivalent] is $22
# [https://www.ebay.com/i/113882534709?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=113882534709&targetid=596843727278&device=c&mktype=pla&googleloc=9017741&poi=&campaignid=2086087905&mkgroupid=76935344123&rlsatarget=pla-596843727278&abcId=1141016&merchantid=138167212&gclid=EAIaIQobChMIkdTsg6id5gIVkYbACh39swz8EAQYAiABEgJEHvD_BwE Closest Commercial Equivalent] is $22
# $18 savings


== Benefited Internet Communities ==
== Benefited Internet Communities ==

Revision as of 01:08, 5 December 2019

Abstract


OSAT stands for Open Source Appropriate Technology and this tool is a clever solution to a age old human need for fire. Using your bare hands to spin a stick back and forth with enough force to create the friction needed for fire causes blisters and other wounds to form on the hands. Especially if the first attempt is unsuccessful. With this tool and a skilled user, many fires could be started much quicker and the user would have no blisters. The scad file can be customized for most sticks and rope can be hand woven from plant fiber. Picture of completed print coming soon. For now, on the right are screenshots of the 3D models and a Primitive Technology video where I got the idea from.


Momentum Fire Starter

Project developed by Cascheel. Here is a Link to a Primitive Technology YouTube video that shows the original design working and some other uses for the tool. The basic consept is that the fly wheel gets compression fitted on the straight-ish stick and the rope is attached to both ends of the pump with the middle of the rope also attached to the end of the stick. the pump gets pushed down and the momentum of the spinning stick re-wraps the rope around the stick for the next pump.

Template:Statusboxtop Template:Status-design Template:Status-prototype You can help Appropedia by contributing to the next step in this OSAT's status. Template:Boxbottom

FlyWheel Firestarter PrimitiveTechnology2.PNG
FlyWheel and Pump Handle.PNG

Bill of Materials

everything needed besides the 2 3D printed parts are essentially free. You will need:

  1. A straight-ish stick with a diameter between 10 and 20 mm
  2. About 2 feet of hand woven or manufactured rope depending on how long the stick is.
  3. Some dry kindling to catch the hot ash
  4. Another small peace of wood to drill onto

Here are the OpenSCAD files for the Momentum fire starter. They are easily cognizable.

File:ChaseFlyWheel.scad 
File:ChasePumpHandle.scad

I couldn't upload the .stl files because of the following error Unavoidable Error.PNG


If you want the stl file for a 10mm diameter stick you can just open the .scad files and click the export to stl button.

Tools needed for fabrication of the Momentum Fire Starter

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. optionally you could get a rope making jig as well gut it is not needed

Skills and Knowledge Necessary to Make the Momentum Fire Starter

Technical Specifications and Assembly Instructions

  1. Print both the FlyWheel and the Hand Pump. Make sure that the optimal flat side it laying on the print bed
  2. I recommend a 90-100% infill for the flywheel but you could probably get away with only doing 70%
  3. Print will take between 1 and 3 hrs to print in total depending on infill and print speed
  4. After printing it will take almost no time to assemble
  5. Obtain the materials
  6. Cut a notch into one end of the stick
  7. Compression fit the flywheel onto the stick until it is about 1/3 the way up the stick
  8. Feed the longer end of the stick through the center hole of the hand pump
  9. Put the middle of the rope into the notch and tie it off with another piece of rope or glue
  10. Tie the ends of the rope to the ends of the hand pump
  11. See video of assembly [Video]

Cost savings

  1. It will cost less than $4 of filament.
  2. saves the user from hand wounds
  3. Closest Commercial Equivalent is $22
  4. $18 savings

Benefited Internet Communities

  • Name and add links to at least 5 using single brackets around [url name]

References

  • The sources of information (e.g. engineering handbooks, journal articles, government documents, webpages, books, magazine articles etc.). References should use the <ref> </ref> and <references/> tags and can be in any format but should include all the information necessary for someone else to find the same information you did. For example: [1]
  1. web page: Department of Energy (DOE) Landscaping and Energy Efficiency, DOE/GO-10095 (1995) Available: http://www.eren.doe.gov/erec/factsheets/landscape.html

Based on the developmental needs addressed (e.g. food, heat, electricity, clean water, health care, etc.) be sure to label your device in the proper categories e.g. use [[Category:Water]]. Be sure to categorize your device so that it will be easy to find – for example “Low voltage connection basics” is categorized in [[Category:How tos]] [[Category:Electricity]] [[Category:Electric lighting]].

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