Filip - thanks for your "bug report" - I was able to fix this problem at the server-side, so you will find it works immediately now, if you try again. In future, note that there is a "Get Technical Help" button next to the "Write a review" one: I fix bug reports immediately - it was just a fluke that I noticed you left me a bad review here, instead of a bug report :-) Feel free to fix or delete this "review" if you can.

True - the updater needs an update itself (I forgot to cater for folders), then the product. When I sort out the last new feature I'm working on (letting people select an outline for a foil, instead of (or as well as) using formulas to make it) I'll re-submit it to the store (a long and complicated process)

Yes - highly complex math on those, especially when used along with props or turbines (Bernoulli etc). In the meantime, you can sketch a foil of for the flow conditions you expect, then manually "revolve" it to get either a duct or cowling that is at least "close" to what you need.

Thanks for the kind review! There are 3 parts to this app: the Fusion 360 add-in (written in Python), the particle-swarm and genetic optimizer (written in Perl), and the CFD solver (Written in Fortran - I kid you not). The "back end" stuff runs on a cluster with 204 high-speed CPUs. Software is a great area to get into - especially if you've got "the knack" (i.e. a logical mind). I'm able to give this away for free because another software product I wrote pays my wages indefinitely - that's the cool thing about software: write it well, and it works indefinitely for you, and you get to spend the money it earns for you :-)

Hi Orazio - thanks for the kind comment. The Prop generator is now included (you might need to open Fusion360 and wait 5 or 10 minutes for the "Update?" option to show in the Add-in first though). Here's a screencast showing how to make props: https://autode.sk/37mAkrs - if you get stuck (or have any comments/feedback), feel free to ask/get in touch!

Hi Karen (and @ron toller): would you be able to spare 5 or 10 mins to help me narrow down the questions my add-in needs to ask to produce useful ducts for people? Maybe post in the forum below (or reply by email to fusion360-support@OceanHydro.com.au ): It would be useful to learn what kind of duct you want (I assume for a prop? if not - tell me!), and what information you already know (or can reasonably find out) about it (speed ranges, size, thrust needed, medium, etc) and how you intend to construct it (e.g. must it be fixed, or can you manage a variable nozzle arrangement). The correct shape means the difference between adding (correct) 20% thrust, or robbing (wrong shape) 50% thrust - and the shape is determined from how it will be used, which I somehow need to ask my users to tell me so I can compute it... https://forums.autodesk.com/t5/fusion-360-api-and-scripts/airfoiltools-add-in-current-feature-list-reply-to-this-topic-to/m-p/9888073 Here's a good video showing how badly the wrong duct makes everything worse: https://youtu.be/mY8ZPB0Gs2I?t=39

Hi Ron - thanks for the review! While the ducts *menu* option isn't yet working, you *can* still make ducts with this tool. Simply generate an airfoil as normal, then sweep it around in a circle to make the duct. That's the simple part. The not-so-simple bit... putting a propeller in the middle means that you've created a "vacuum" at the inlet, and a faster-moving stream of air at the outlet - so the inlet needs to be wider than the outlet (it's best if you can put the prop as close to the inlet opening as possible, so the inlet is not in the way of the air it's trying to suck in!). It's probably worth experimenting with an un-ducted prop and some string or paper, so you can get the outlet size right: https://youtu.be/fbOXXLtaOVg . If it's *wrong*, you reduce the thrust.

Yes, it does import and export - but you need the updated version for that (go into the Add-in "settings" and click the "check now" box). I posted screenshots of this: https://forums.autodesk.com/t5/fusion-360-design-validate/beta-testers-wanted-for-my-add-in-airfoil-tools-testing-import/td-p/9871893 Besides reading (and, optionally, automatically repairing) any kind of airfoil data file in any known format (or even just excel), it also includes options to re-spline the input, set minimum thicknesses, scale and join to your chosen location, rotate arbitrary amounts, flip it, add constraints, wrap it all around some axis (e.g. for rotating foils, like propellers), and insert elipses (useful for wingtips to have nice ends). I will be submitting this update to the production version after it undergoes more testing.