{"id":16,"date":"2020-09-12T01:40:00","date_gmt":"2020-09-12T01:40:00","guid":{"rendered":"http:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/uncategorized\/pietech-v-1-p-2-redesigned-sun-gear-makes-this-model-the-pie-4-3\/"},"modified":"2020-12-15T02:18:36","modified_gmt":"2020-12-15T02:18:36","slug":"pietech-v-1-p-2-redesigned-sun-gear-makes-this-model-the-pie-4-3","status":"publish","type":"post","link":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/inertial-drive\/pietech-v-1-p-2-redesigned-sun-gear-makes-this-model-the-pie-4-3\/","title":{"rendered":"PIETECH V.1, P. 2: Redesigned Sun Gear Makes This Model The \u201cPIE 4.3\u201d:"},"content":{"rendered":"

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Inverted Chain Sun Gear<\/div>\n

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I am really pleased with the raw power that the PIE 4.0 exhibits. This power is still quite wild and unrefined, but it is impressive, nonetheless.<\/p>\n

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I was happy with the inverted chain design, but I quickly saw some issues that would give me trouble keeping the PIE running. Mainly the width of the chain is too narrow to allow for wheel run-out and axle deviations. The main wheel is expected to deflect some and I am not using a precision sun gear axle so I have no realistic expectation of it being perfectly straight.<\/o:p><\/p>\n

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Narrow Chain\/Gear Mating Area<\/div>\n
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Now the sun gear has now been redesigned\/improved. It still functions as an inverted chain but rather than roller chain, 8mm (5\/16\u201d) rods are used. The new sun gear width is 30mm (1-3\/16\u201d) so there is plenty of room to change designs. <\/o:p><\/p>\n

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Redesigned Sun Gear<\/div>\n
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The new sun gear is made from two #40-26 tooth sprockets with the teeth cut nearly off and 8mm (5\/16\u201d) rods welded into the remaining tooth divots. A piece of 1\u201d steel rod with the center drilled to 5\/8\u201d is used for the center of the gear. The sprockets are welded to the center rod and the 5\/16\u201d rods ae then welded in place.<\/o:p><\/p>\n

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Bench testing is showing that adjusting the sun gear\u2019s timing by as little as 1 or 2 teeth (13 to 23 degrees) changes the direction of thrust dramatically. <\/p>\n

Below is a video of the new sun gear set for forward motion and PIE clamped firmly to the bench.<\/o:p><\/p>\n

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I am planning on doing more extensive testing in the next days and weeks, including the use of an inverter to make the drive portable for vehicle testing! <\/o:p><\/p>\n

It has occurred to me that since the PIE 4.0 has already gone through 2 gear redesigns and a motor swap that this is truly the PIE 4.3, so that is what it shall be known as\u2026 PIE 4.3!<\/o:p><\/p>\n","protected":false},"excerpt":{"rendered":"

  Inverted Chain Sun Gear I am really pleased with the raw power that the PIE 4.0 exhibits. This power is still quite wild and unrefined, but it is impressive, nonetheless. I was happy with the inverted chain design, but I quickly saw some issues that would give me trouble keeping the PIE running. Mainly … Continue reading “PIETECH V.1, P. 2: Redesigned Sun Gear Makes This Model The \u201cPIE 4.3\u201d:”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":91,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,14,4,19,16,15,9],"tags":[],"class_list":["post-16","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-brandson-roy-thornson","category-hybrid","category-inertial-drive","category-pie-4-3","category-pietech","category-plug-in-hybrid","category-pulsed-inertial-engine"],"_links":{"self":[{"href":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/wp-json\/wp\/v2\/posts\/16"}],"collection":[{"href":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/wp-json\/wp\/v2\/comments?post=16"}],"version-history":[{"count":1,"href":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/wp-json\/wp\/v2\/posts\/16\/revisions"}],"predecessor-version":[{"id":104,"href":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/wp-json\/wp\/v2\/posts\/16\/revisions\/104"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/wp-json\/wp\/v2\/media\/91"}],"wp:attachment":[{"href":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/wp-json\/wp\/v2\/media?parent=16"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/wp-json\/wp\/v2\/categories?post=16"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stclairtech.tech\/grassrootsmechanicmovement\/wp-json\/wp\/v2\/tags?post=16"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}