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Message: <blockquote data-quote="Lojak" data-source="post: 838831" data-attributes="member: 53081">Time for a helmet update!HelmetI want to have some air circulations for cooling and to help with fogging (fingers crossed there big time). To do this I purchased to <a href="https://www.amazon.com/WDERAIR-Bearing-Replacement-Radiator-Appliances/dp/B0C76XL96L/ref=sr_1_9?crid=2FW4VAVTT0TLL&dib=eyJ2IjoiMSJ9.sb7kX4QpqNCz2XmOqH9XLVw629nRve-zJUGQvXMmpqh7ZMGMUCay0HnN5LSp7C1lyaxYzpwArZVlpA5zY_WqM5sOZuAWHCMF4CT_ePTCeuptt1Tc7hkp-5lBuNdhlEGlIjZH9Cx63LppUngDJNrXbVBWRI54HmczLP0-xqOMvU4SqJOuZ_LEQDbfUIFu8p_YtZ-dXRPJAUCOyHiXNQrRTlYi02gLFebp8Kp9Js5XByk.-QPzes7fqJ0SGhvHyKrPXJwsqWPref48gemvcxbCpzQ&dib_tag=se&keywords=4010%2Bfan%2B24v&qid=1708974822&sprefix=4010%2Caps%2C328&sr=8-9&th=1" target="_blank">40mmx10mmx10mm directional fans</a> (similar listing to what I used) to pull air from the modeled vent features. This meant some rotary surgery. I drilled small holes in each corner and then a large hole in the center of each "vent", then used a rotary bit to slowly carve out the rest. Later, I followed up with hand fills to sharpen the corners and smooth the edges. Bottom vent is for air in, top vent is for air "out" (really just an increase in circulation near my mouth).[ATTACH=full]342742[/ATTACH][ATTACH=full]342743[/ATTACH]To help get the air flow going where I wanted, which was over the back of my head and down visor, I then took plastic card and slowly templated out on one side the shape of the duct work. I also used air dry eva clay to make seals for any odd shapes. Once one side was constructed. I took the mighty painters tape and made a pattern to transfer and cut from more plastic card.[ATTACH=full]342744[/ATTACH][ATTACH=full]342745[/ATTACH][ATTACH=full]342746[/ATTACH]I left space in the duct work for the fans to be removed and replaced. To make this happen I took the fans and glued them to some plastic card, then used hot glue to attach them. I figure the hot glue will hold but also rather manageable if I need to do some servicing. To seal the rest of the gaps, I packed with more foam clay. I'm hoping that the foam will also help with noise dampening.[ATTACH=full]342747[/ATTACH][ATTACH=full]342748[/ATTACH][ATTACH=full]342749[/ATTACH][ATTACH=full]342750[/ATTACH]Lastly was the duct work for the top half of the helmet. I used more plastic card to make the duct come to the crown of head, then constructed a delta to help disperse the airflow (in theory, I didn't finish my aerospace degree, chemistry sucks).[ATTACH=full]342751[/ATTACH][ATTACH=full]342752[/ATTACH]Just need to do a bit of clean up then I can permanently put the two halves of the ODST helmet together.(I do see some concerns with the design... Let's just hope they are for nothing, otherwise things might get very tricky to fix.)</blockquote>

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