{"id":480,"date":"2009-07-10T23:54:50","date_gmt":"2009-07-10T13:54:50","guid":{"rendered":"http:\/\/www.madox.net\/blog\/?p=480"},"modified":"2009-07-10T23:56:22","modified_gmt":"2009-07-10T13:56:22","slug":"schnellboot-100-s-100-part-2-proof-of-concept","status":"publish","type":"post","link":"https:\/\/www.madox.net\/blog\/2009\/07\/10\/schnellboot-100-s-100-part-2-proof-of-concept\/","title":{"rendered":"Schnellboot $100 (S-100) \u2013 Part 2 Proof of Concept"},"content":{"rendered":"

Just heard that the fibre-glass hulls are almost complete and I’ve still done really nothing about the little boat.\u00a0 A couple of areas of concern are :-<\/p>\n

    \n
  1. The weight of the equipment<\/li>\n
  2. The ability to turn by differential thrust (vector-push?)<\/li>\n<\/ol>\n

    To answer the first one is quite easy by weighing the equipment I’ve already purchased in Part 1<\/a>.<\/p>\n

    To answer the second one will unfortunately prove to the world I’m inherently lazy and still a kid on the inside.<\/p>\n

    <\/p>\n

    Weight\/Mass<\/h2>\n

    I’ve always known that aerial vehicles has to always consider mass in the design but didn’t anticipate I’ll be on such a tight mass budget for a boat.\u00a0 The hull maker advised there’ll probably only be a hundred or so grams to play with if the boat is to float at the correct waterline.<\/p>\n

    A digital scale to weigh each of the components showed that the Polulu descriptions were not too far off the mark.<\/p>\n

    <\/p>\n\n\n<\/col>\n<\/col>\n<\/col>\n<\/col>\n<\/col>\n<\/col>\n<\/col>\n<\/colgroup>\n\n\n\n\n\n\n\n\n
    <\/td>\n
    \n<\/strong><\/td>\n    		Unit Cost<\/td>\nUnit Mass<\/td>\nQty<\/td>\nCost<\/td>\nMass<\/td>\n<\/tr>\n
    Controller<\/td>\nBaby Orangutan B-48 Robot Controller<\/a><\/td>\n24.95<\/td>\n3.2<\/td>\n1<\/td>\n24.95<\/td>\n3.2<\/td>\n<\/tr>\n
    Motors<\/td>\n10:1 Micro Metal Gearmotor HP<\/a><\/td>\n15.95<\/td>\n9.4<\/td>\n2<\/td>\n31.9<\/td>\n18.8<\/td>\n<\/tr>\n
    Radio<\/td>\nTransceiver nRF24L01+ Module with Chip Antenna<\/a><\/td>\n19.95<\/td>\n1.5<\/td>\n1<\/td>\n19.95<\/td>\n1.5<\/td>\n<\/tr>\n
    Batteries<\/td>\nAAA NiMH Battery<\/td>\n<\/td>\n13.7<\/td>\n5<\/td>\n0<\/td>\n68.5<\/td>\n<\/tr>\n
    <\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
    <\/td>\nTotal not including miscellaneous parts…<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n92<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Yup…still good to go… only a few precious grams let for miscellaneous wires and stuff but hopefully the balsa skin should give a bit of extra buoyancy.<\/p>\n

    Turning Radius<\/h2>\n

    Now this is the ‘fun’ bit hehe.\u00a0 $15 AUD of fun.\u00a0 Photos are worth a thousand words so onto the photos!<\/p>\n

    \"Couldn't<\/a>
    Couldn't resist taking it out of the packaging...<\/figcaption><\/figure>\n
    \"Size<\/a>
    Size comparison to a SD Card - roughly same width as the Schnellboot<\/figcaption><\/figure>\n
    \"Again<\/a>
    Again very similar to the Schnellboot configuration I had in mind, dual counter-rotating propellers<\/figcaption><\/figure>\n
    \"Set<\/a>
    Set of two spare props with the toy...crappy quality...<\/figcaption><\/figure>\n

    I accidently broke one of the propellers and after popping on a spare the whole boat went wacko wrong way…so I figured they were counter rotating props!\u00a0 Wow… but still the quality of the propellers were horrible.\u00a0 So goes my plan of using these props on the real boat.\u00a0 Anyway a video of a test run in the infamous bathtub to have a look at the turning radius…<\/p>\n

    <\/embed><\/object><\/p>\n

    All in all cheap eBay fun proves the Schnellboot model will probably work \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"

    Just heard that the fibre-glass hulls are almost complete and I’ve still done really nothing about the little boat.\u00a0 A couple of areas of concern are :- The weight of the equipment The ability to turn by differential thrust (vector-push?) To answer the first one is quite easy by weighing the equipment I’ve already purchased … Continue reading “Schnellboot $100 (S-100) \u2013 Part 2 Proof of Concept”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-480","post","type-post","status-publish","format-standard","hentry","category-engineering"],"_links":{"self":[{"href":"https:\/\/www.madox.net\/blog\/wp-json\/wp\/v2\/posts\/480","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.madox.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.madox.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.madox.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.madox.net\/blog\/wp-json\/wp\/v2\/comments?post=480"}],"version-history":[{"count":3,"href":"https:\/\/www.madox.net\/blog\/wp-json\/wp\/v2\/posts\/480\/revisions"}],"predecessor-version":[{"id":487,"href":"https:\/\/www.madox.net\/blog\/wp-json\/wp\/v2\/posts\/480\/revisions\/487"}],"wp:attachment":[{"href":"https:\/\/www.madox.net\/blog\/wp-json\/wp\/v2\/media?parent=480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.madox.net\/blog\/wp-json\/wp\/v2\/categories?post=480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.madox.net\/blog\/wp-json\/wp\/v2\/tags?post=480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}