<p>What fan speed should I use with PLA? Do I need to manually set the fan speed in ‘Control’?</p>
<p>Also, on the filament cartridge Bed Temp is listed: <em>&quot;No heat/60-80 °C&quot;</em>. Does this mean heating the bed is optional?</p>

[{'answer_id': 16362, 'author': 'Zeiss Ikon', 'author_id': 28508, 'author_profile': 'https://3dprinting.stackexchange.com/users/28508', 'pm_score': 3, 'selected': True, 'text': "<p>Most commercial blow-molded fuel tanks for model airplane fuel (methanol or ethanol, nitromethane or nitroethane, and some combination of castor, mineral, or synthetic lubricating oil) are made from HDPE.  This material isn't commonly seen as filament, in my limited experience, but it ought to be possible to arrive at settings that will give a liquid tight tank without further sealing if you can find some.  As you note, limonene might be used to smooth/seal HDPE prints, but likely won't be necessary if your settings are right.</p>\n<p>You might want to test PETG filament for its resistance to your fuel mix(es) -- this material <em>is</em> available as filament, prints with settings little different from generic PLA (in my experience, higher nozzle and bed temperature, and a little more bed clearance for the first layer), with good layer adhesion and, with a good print, is liquid-tight as printed.  It's not particularly flexible (as is the case with HDPE), but since you can customize the shape of your fuel tank, it may work for you -- or it may be more flexible in vase mode, as PLA is.</p>\n<p>Sealing PETG may be as simple as baking it (similar to &quot;heat treating&quot; PLA to increase print strength, albeit again at a higher temperature) -- this partial remelting will ensure that layers are adhered throughout the print, which (presuming you have avoided under-extruded areas) should be all that's needed to make a printed tank liquid tight.</p>\n"}, {'answer_id': 16370, 'author': 'Perry Webb', 'author_id': 15075, 'author_profile': 'https://3dprinting.stackexchange.com/users/15075', 'pm_score': 2, 'selected': False, 'text': '<p>As a supplement to the answer (doesn\'t fit well in the comments).  This site <a href="https://www.filamentive.com/chemical-resistance-of-3d-printing-filament/" rel="nofollow noreferrer">https://www.filamentive.com/chemical-resistance-of-3d-printing-filament/</a> lists PETG has have a very high restance to alcohol, a high resitance to fuel</p>\n<blockquote>\n<p><strong>Is PETG UV Resistant?</strong></p>\n</blockquote>\n<blockquote>\n<p>In the long run, it is now a well-known fact that it will almost always come out on top when it comes to objects and builds that have to be resistant to ultraviolet (UV) radiation. I.e., UV resistant. This is why it is ideal for objects that have to be kept under the harsh mid-summer sun. This is because UV radiation has minimal effect on it as compared to PLA and ABS.\n--\nFrom <a href="https://makershop.co/petg-uv-resistance/" rel="nofollow noreferrer">https://makershop.co/petg-uv-resistance/</a></p>\n</blockquote>\n'}]
['https://3dprinting.stackexchange.com/questions/16378', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/28580/']