Would such an abrupt axial fan funnel work?

Here is the 4020 blower in its place …

When I had a similar problem, I bought a ducted fan http://www.ebay.co.uk/itm/151955593606?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT although I still want to print some sort of nozzle for it.

@Chris_Jones yep, I just have to use the 4020 one, which funny enough is more expensive albeit smaller … (the diff is pretty small nevertheless)

Should work fine, especially if your fan is pressure optimized.

@Sebastian_Uribe_uRiB
Are there such things as pressure-optimized axial fans? never heard of it…

@Florian_Ford yes, but my guess is that most axial fans are pressure optimized. It’s easy to tell by the design of the blades. If they’re large, and there’s little space between them, they’re pressure optimized. If they are thin, with alot of space between them, they aren’t pressure optimized. But fans like that are not very common.

@Sebastian_Uribe_uRiB I ultimately went with the 4020 blower as there is 1 less part to 3D print so they won. My XCarriage is pretty complex as is (albeit very space efficient, packing a lot of features)

@Florian_Ford yeah. I think that’s a better choice

I think it stands a good chance, fans are quite efficient pushing against positive pressure. It’s a really quick print and should be pretty easy to do a CFM test vs a free fan.

Unfortunately I am printerless since a few months and decided against a kit and started to design my own. Unfortunately a corexy has many printed parts so I am trying to keep the non-essential parts count down. This being in the latter category I opted for now for a 4020 blower, which can be slapped onto the X carriage with some screws.

Near a makerspace?

Nope, I will employ some 3d hub to do the printing for the prototype