{"id":2359,"date":"2018-10-06T17:21:53","date_gmt":"2018-10-06T17:21:53","guid":{"rendered":"http:\/\/www.daveakerman.com\/?p=2359"},"modified":"2018-10-06T17:21:53","modified_gmt":"2018-10-06T17:21:53","slug":"the-compleat-chase-car","status":"publish","type":"post","link":"http:\/\/www.daveakerman.com\/?p=2359","title":{"rendered":"The Compleat Chase Car"},"content":{"rendered":"<p>Chasing balloons is often the best part of the entire process, but can be challenging if you don&#8217;t have the right kit, or it isn&#8217;t accessible.\u00a0 It&#8217;s particularly difficult if, as with many of my flights, you&#8217;re chasing alone; a laptop isn&#8217;t much use when you&#8217;re driving!<\/p>\n<p>My previous car was an old Shogun, which served me well but the list of faults was getting rather long so I traded it in for a Hyundai Santa Fe &#8211; a bit smaller and not quite as capable off road, but for HAB use with the odd muddy field it will do just fine.\u00a0 I chose the 5-seat model as it has a huge under-floor compartment in the boot (where the extra row of seats would have been); I use that to store aerials and other equipment:<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-large wp-image-2360\" src=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0907-1024x683.jpg\" alt=\"\" width=\"640\" height=\"427\" srcset=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0907-1024x683.jpg 1024w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0907-300x200.jpg 300w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0907-768x512.jpg 768w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>Here I have:<\/p>\n<ul>\n<li>Chase rucksack with tape, ties, knife, hooks, waterproof bag for phone.<\/li>\n<li>Yagi aerials for 434 and 868MHz<\/li>\n<li>Torches<\/li>\n<li>Wellies<\/li>\n<li>Spare magmount aerials<\/li>\n<li>Saws<\/li>\n<li>SLA 12V battery<\/li>\n<li>Raspberry Pi LoRa gateway<\/li>\n<\/ul>\n<p>The LoRa gateway uses a Pi 3 with 434 and 868MHz modules, and connects to the internet via a 4G MyFi device in the cabin.<\/p>\n<p>The gateway aerial cables run underneath the boot, up through the door trim and out at the roof to magmount aerials which attach to washers inside the car when not in use:<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-2368 size-large\" src=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0912-e1538844857469-683x1024.jpg\" alt=\"\" width=\"640\" height=\"960\" srcset=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0912-e1538844857469-683x1024.jpg 683w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0912-e1538844857469-200x300.jpg 200w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0912-e1538844857469-768x1152.jpg 768w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p>Power for the gateway comes from a 37Ah 12V SLA via a 12 &#8211;&gt; 5V adapter.\u00a0 Power to the adapter is switched via a panel mounted in the side of the boot:<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-2366 size-large\" src=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0910-e1538844997979-683x1024.jpg\" alt=\"\" width=\"640\" height=\"960\" srcset=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0910-e1538844997979-683x1024.jpg 683w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0910-e1538844997979-200x300.jpg 200w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0910-e1538844997979-768x1152.jpg 768w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p>The panel includes a voltmeter and dual USB socket, both switched via the first switch in the panel.\u00a0 The 3rd switch connects power to a 240VAC inverter via a relay next to the SLA.\u00a0 All supplies are fused, and for convenience the SLA powers 12V cigar lighter sockets in the boot and cabin.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-large wp-image-2364\" src=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0908-1024x683.jpg\" alt=\"\" width=\"640\" height=\"427\" srcset=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0908-1024x683.jpg 1024w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0908-300x200.jpg 300w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0908-768x512.jpg 768w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p>With all this kit in the underfloor compartment, the boot floor is clear and I wanted to keep it that way, so I mounted the various poles (for removing payloads from trees) to the seat backs, using Velcro straps held by metal plates screwed to the seats:<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-2363 size-large\" src=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0906-e1538845333758-683x1024.jpg\" alt=\"\" width=\"640\" height=\"960\" srcset=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0906-e1538845333758-683x1024.jpg 683w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0906-e1538845333758-200x300.jpg 200w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0906-e1538845333758-768x1152.jpg 768w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p>Up front, I fixed my Yaesu 817 radio to the side of the centre console, using adhesive Velcro tape.\u00a0 The 817 is kept charged from the car 12V supply.\u00a0 Other connections include the aerial (another magmount), audio via a transformer to prevent earth loop noise, and a USB power adapter:<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-large wp-image-2361\" src=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0904-1024x683.jpg\" alt=\"\" width=\"640\" height=\"427\" srcset=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0904-1024x683.jpg 1024w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0904-300x200.jpg 300w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0904-768x512.jpg 768w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p>Now onto the dashboard.\u00a0 On top is my old Pi-based LCARS device, and below is a Pumpkin double-DIN head unit running Android 7.1.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-2362 size-large\" src=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0905-e1538845969790-683x1024.jpg\" alt=\"\" width=\"640\" height=\"960\" srcset=\"http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0905-e1538845969790-683x1024.jpg 683w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0905-e1538845969790-200x300.jpg 200w, http:\/\/www.daveakerman.com\/wp-content\/uploads\/2018\/10\/IMG_0905-e1538845969790-768x1152.jpg 768w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p>The Pi device runs a Python application that I wrote a while ago, emulating the Star Trek LCARS displays.\u00a0 Here it&#8217;s streaming video to YouTube:<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-large\" src=\"https:\/\/pbs.twimg.com\/media\/Dovx8LqX0AAZgTH.jpg:large\" width=\"2048\" height=\"1360\" \/><\/p>\n<p>As for the head unit,\u00a0 these are essentially Android tablets with WiFi and GPS, FM radio, amplifier, front panel volume control and some handy buttons, SD card slots, and front and rear USB sockets.\u00a0 This model also has video in (for a rear-view camera and DVD player for example), video out (for seat-back displays), audio in and a steering wheel audio control input.\u00a0 Buying last year&#8217;s model saved a fair amount of money, but didn&#8217;t lose any functionality and it&#8217;s plenty quick enough in use.\u00a0 Here&#8217;s a short video showing it in use:<\/p>\n<p><iframe loading=\"lazy\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/ZGJXC_13tAg?feature=oembed\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe><\/p>\n<p>I installed apps for offline navigation and OS mapping, plus my own HAB chase app which I intend to release soon.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-large\" src=\"https:\/\/pbs.twimg.com\/media\/DoIWl9CU4AAakJ0.jpg:large\" width=\"776\" height=\"456\" \/><\/p>\n<p>That app receives data from the LoRa gateway in the boot so it knows where the balloon is, and uses that plus the head unit&#8217;s GPS to provide navigation to the balloon once it lands.\u00a0 I&#8217;ll cover the app in more depth in a separate post.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Chasing balloons is often the best part of the entire process, but can be challenging if you don&#8217;t have the right kit, or it isn&#8217;t accessible.\u00a0 It&#8217;s particularly difficult if, as with many of my flights, you&#8217;re chasing alone; a laptop isn&#8217;t much use when you&#8217;re driving! My previous car [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"_links":{"self":[{"href":"http:\/\/www.daveakerman.com\/index.php?rest_route=\/wp\/v2\/posts\/2359"}],"collection":[{"href":"http:\/\/www.daveakerman.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.daveakerman.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.daveakerman.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.daveakerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2359"}],"version-history":[{"count":1,"href":"http:\/\/www.daveakerman.com\/index.php?rest_route=\/wp\/v2\/posts\/2359\/revisions"}],"predecessor-version":[{"id":2369,"href":"http:\/\/www.daveakerman.com\/index.php?rest_route=\/wp\/v2\/posts\/2359\/revisions\/2369"}],"wp:attachment":[{"href":"http:\/\/www.daveakerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.daveakerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2359"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.daveakerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}