Akromaster-20 Shared development build proposal

@mikeyc38 Hi  Michael, that is exactly what I did last night. I actually used Fusion 360 to sketch round the plan aerofoil shape and from that I produce a BMP ilage of it and imported that into the aerofoil library in Profili Pro. 

With a bit more tinkering I will be just about there.  

thanks for reaching out, I look forward to checking your channel later tonight 

regards 

Jono 

@jono Great minds think alike! If my memory serves me correctly I think there is an "airfoil" compare facility in Profili Pro so that you can match your scan to one of the airfoils in the library.

BTW the I too am a keen photographer - currently using a Canon 7D Mk 2 specialising in Sports, bird and aviation photography. Can't justify the cost of canon's mirrorless bodies at the moment and want to expand my collection of "L" lenses 🤫 

@mikeyc38 ah cool me too I have a bit of investment in EF glass but have just dipped a toe into mirrorless with an RP and an adaptor. I am interested in a range of subjects planes, bikes, cars, birds, flowers and landscapes.

I just had a quick go at creating the wing in Fusion 360, imported the wing png, sketched the outlines, created root and tip planes and then used the NACA 63-015a airfoil which seems to be a good match for the plan. Using the sheet loft I created the wing skin then created vertical planes and rectangular sketches (patched) at the rib positions then cut these using the wing sheet as the cutting tool. Deleted outside elements of the cut sketches and am left with the wing ribs. I took about as much time as it took to type this! OK I haven't drawn the spars / spar notches but just wanted to see how quick it was in Fusion 360!

@rong Hi Ron That sounds really interesting and it a technique I have not learned yet, I would like to see more 😀

I have been working on the wing too and I think it will be the first bit I will build. I have basically drawn the root rib profile with a spline then exported it to a dxf loaded that into turbo cad to convert it to a bmp file which is then importable into Profili. I used profili to construct all the ribs spar notches, lightening holes and build tabs. Then exported into dxf which is then importable into Fusion 360. This is all faster than it sounds (luckily).

i think your way could be better and i would really like to see the process 

Great to see you joining in 

Jono 

Just did the same exercise using Winghelper (first time user!). Created all ribs with spar cut outs ready for cutting in about 15 mins - not bad.

Some screen shots of progress 

@rong that is very good. It really shows that there are a few options to get the job done

Just tried to use Winfoil but not only did the extremely antiquated interface put me off so did the file handling and associated problems trying to import an airfoil file. I will not be using that bit of software again!

@rong I like profili it it is worth the money and will be more so if I can get my laser cutter working nicely

@jono Yes DevWing (more improved version of Profili)looks good it’s just a shame it only runs on Windows unlike WingHelper which is multi platform. Cost wise it’s approximately £40 dearer than WingHelper although Profili XT is about the same. For me, who doesn’t do a lot of wing designing, redrawing, then I’ll probably stick with Fusion360.

I thought that I'd have a go at reproducing the wing ribs for the Akro using Fusion 360, so sat down a little while ago:

Wing ribs created from the NACA 63015-a profile as that was a very close match, if not identical to the airfoil on the plans.

I selected the wing section of the plan, converted the PDF to JPG then imported into Fusion 360 whereupon I scaled it to give 700mm for a wing half.

I then sheet lofted the root rib to the tip rib with spar positions in place

Using the wing sheet as a cutting tool (a bit like a cookie cutter) I formed the ribs shown in the first image which were then prepared for DXF export (using the manufacturing arrange function of Fusion 360)

The whole exercise took no longer than about 20 mins!

@rong Hi Ron 

thanks for adding that, there are a few things there that I have not tries before 

regards 

Jono 

Once you know how and understand the difference between Bodies and Components it becomes relatively easy and gets over the need to go and get (and learn) another bit of software!

@rong Hi, I don't know the difference between then as yet. I have not used components yet. Should I be doing that ?