Astrocam Sprint - Mike Dorffler Edition

prusaprinters

<figure class="image image_resized" style="width:44.43%;"><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/53cab6e1-8857-4494-8c46-4f029a63cc3a/sprint-decal.png#%7B%22uuid%22%3A%22fb35ff7a-6878-4aea-9af5-788413cdabd3%22%2C%22w%22%3A326%2C%22h%22%3A326%7D"></figure><p>&nbsp;</p><p>Two of my FAVORITE rockets growing up (<a href="http://www.spacemodeling.org/jimz/k-49.htm">Astron Sprint</a> and <a href="https://makezine.com/2011/10/17/remembering-mike-dorffler-cineroc-creator/">Cineroc</a>) were designed by Mike Dorffler. &nbsp;So as a tribute to his inspirational work I merged them together (more or less). &nbsp;The Astrocam Sprint nosecone can be printed in colors that resemble the Cineroc.&nbsp;</p><figure class="image image_resized" style="width:47.96%;"><img src="https://i2.wp.com/cdn.makezine.com/uploads/2011/10/cineroc_2.jpg?resize=400%2C490&amp;is-pending-load=1#038;ssl=1"></figure><figure class="image"><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/a1f5fd4f-1f4a-43cc-a9f9-be7adcad5a8e/astrocam-sprint-both.jpg#%7B%22uuid%22%3A%22730bde58-3df0-4f41-a80f-f0822355f4b3%22%2C%22w%22%3A879%2C%22h%22%3A733%7D"></figure><p>The fin can is designed with “through the wall” fin printing. &nbsp; When printed in color each fin has a full ‘bond’ with the inner support but it's probably just as strong when printed in a single color. &nbsp; &nbsp;I print at 2mm layer height and 100% infill.&nbsp;</p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/678e6980-f590-4616-975a-03a5ffc227a1/tails-section.jpg#%7B%22uuid%22%3A%22ad29e905-8c86-431b-a762-0e49f28b64e2%22%2C%22w%22%3A697%2C%22h%22%3A733%7D"></figure><figure class="image"><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/ba553f0c-cc15-44a5-9dbd-cd5a0612b9a4/astrocam-sprint.jpg#%7B%22uuid%22%3A%227de373f2-52ae-4c64-aec8-e80ebdff6fcd%22%2C%22w%22%3A1021%2C%22h%22%3A557%7D"></figure><p>&nbsp;</p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/a74f5315-3686-4ae5-a7e3-804cfc3b7118/nose-cone-shock-cord.jpg#%7B%22uuid%22%3A%2234bf4557-53f7-47cc-9507-cc0a30938b86%22%2C%22w%22%3A880%2C%22h%22%3A740%7D"></figure><p><a href="https://www.amazon.com/gp/product/B07DP8ZV43/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&amp;psc=1">Vanta Thread</a></p><figure class="image image_resized" style="width:75.84%;"><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/e4b695f9-56ca-478d-b4a8-6c551a8f13b0/nose-cone-suspended.jpg#%7B%22uuid%22%3A%22b55845ef-58f8-4812-a648-9e09d76c4c8d%22%2C%22w%22%3A1080%2C%22h%22%3A1485%7D"></figure><p>Suspended Nose Cone. &nbsp;You can either have it recover on its own chute or attach a eye screw into the base for attaching the airframe to the nose cone.</p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/4323c5c9-287d-4a4a-b190-64a19c325e7e/astrocam-sprint-on-rod-copy.jpg#%7B%22uuid%22%3A%224ea3ab70-08a9-4080-bdcf-7bba13bc4c5a%22%2C%22w%22%3A1141%2C%22h%22%3A468%7D"></figure><figure class="image"><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/75fab219-f8be-4ffa-8174-c53def8f0cf7/astrocam-sprint-cut-away-copy.jpg#%7B%22uuid%22%3A%224313f02d-964e-48a3-9f5c-8c98834e5c0f%22%2C%22w%22%3A1044%2C%22h%22%3A395%7D"></figure><p>The first stage fin can may look identical to the sustainer fin can but it doesn't have the block at the forward end. &nbsp;This allows for the BT-20 to pass through and meet up with the upper stage (sustainer) motor.</p><p>The RED spacer is designed to offset the upper stage motor so it fits into the first stage BT-20 tubing.</p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/e735d90f-f46f-48a0-b077-b70b1fe3e8b0/staging-cut-away.jpg#%7B%22uuid%22%3A%228bc3c95d-fddb-454a-848d-56d37f4a252f%22%2C%22w%22%3A853%2C%22h%22%3A669%7D"></figure><p>Funny how these projects go sometimes. &nbsp;After getting the other nosecone to work I found out that the original Sprint used a BNC-50X and I had modeled off the BNC-50Y. &nbsp;So for ‘authenticity sake’ I've added a BNC-50X version of both the stock and Astrocam nosecones.</p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/eb827045-5a77-4155-bbf1-27591949590c/astron_sprint__bnc-50x.png#%7B%22uuid%22%3A%22b226c9c0-3aa8-429c-bb67-e7213c2a0d83%22%2C%22w%22%3A1303%2C%22h%22%3A733%7D"></figure><figure class="image"><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/69578e6f-fc38-4492-9a82-80cc20c3cbce/sprint-with-bnc-50x.png#%7B%22uuid%22%3A%2220a19a71-d177-446e-846e-8c05994d5241%22%2C%22w%22%3A1303%2C%22h%22%3A733%7D"></figure><p><a href="https://media.prusaprinters.org/media/prints/145093/other_files/1385748_236f8012-09e9-47c5-ab77-8d0435488364/three-stage-astrocam-sprintrkt.txt#_ga=2.39142755.1942045687.1646318681-1767878599.1639874725">Included is the Rocksim / Open Rocket file </a>(just remove the .TXT from the file name) and yes, if you're crazy enough you can triple stage this beast to over 3000'! &nbsp;(so says the sim)&nbsp;</p><p><img src="https://media.prusaprinters.org/media/prints/145093/rich_content/cded48ff-3364-4fda-b3f6-e67c7210287a/image.png#%7B%22uuid%22%3A%2208595ee1-5151-4591-9a27-5bdbaeeade1d%22%2C%22w%22%3A1008%2C%22h%22%3A358%7D"></p><figure class="image"><img></figure>