New Wings

[Michal]

My project is relatively small but might be interesting. It is a modification of my Graupner model (bar is closed due to virus), which I flied with Dwight as an instructor. It looks nice but it is too fast for my flying skills. So I decided to slow it down by designing and building new wings. I increase the wing area from 460 sq.in to 660 sq.in, used higher lift Eppler 197 airfoil and added slotted flaps. The challenge was that I had to use the same mounting as in the model with a single screw. It is a cantilever wing without struts and the new wingspan is 1.9m. The load will be taken by two strong spruce/plywood/balsa beams. Per my calculation they should take UP TO 6G down load.

[Michal]

I ordered some plywood parts to be laser cut by UMAKE.CA. I noticed that parts are OK for up to 1/16 thickness, for 1/8 they have burns around sharp corners. I gave the shop CAD models but noticed later that the parts were off around about 0.005”. Not much but next time I should tell them to enter proper offset or add this 0.005” to my CAD model.

[Michal]

Construction is progressing

[alanh]

An interesting place to build a model airplane lol

[Mezri]

Very nice job...

[Dougf]

Michal,
This looks like commercial aircraft level quality, very impressive. I would never notice 5 thou tolerance on any of my builds, I'd be lucky to be within 1/16" :)) Good luck with your bar project.

[Dwight Macdonald]

Very nice work Michael, it looks like structure expected in a full scale wing!

[Michal]

Thank you Dwight, I hope You will help me with a test flight. I am also watching your project, it is impressive.

[Michal]

This looks like commercial aircraft level quality, very impressive. I would never notice 5 thou tolerance on any of my builds, I'd be lucky to be within 1/16" :)) Good luck with your bar project.[/QUOTE]

0.005" is not much but when you have a lot of parts its add quickly.

[pierre sarault]

Very clean Design, should fly beautifully.
For your CAD are you using Autodesk Fusion 360 or Dassault Solidworks?

[Michal]

Very clean Design, should fly beautifully.
For your CAD are you using Autodesk Fusion 360 or Dassault Solidworks?

I am using Dassault CATIA, which I mastered for many years.

[Florin]

Congratulations Michal for impressive design and construction. Your aerospace engineering background is helping there. Very nice looking aircraft that soon will get new wings. Nice background in that photo too :)

[Michal]

Congratulations Michal for impressive design and construction. Your aerospace engineering background is helping there. Very nice looking aircraft that soon will get new wings. Nice background in that photo too :)

Thank you Florin I am doing my best after 40 years break in model building. My former radio you can see in the museum now. I am taking advantage of the rehab and converted the bar into workshop.

Cheers

[ImFM]

Great project, thank you for sharing.

... und Prost. I enjoyed the signs behind your bar a lot :)

[Michal]

Finally I manage to complete my wings. Waiting for a good time for a test flight.

[Vol-Libre22]

Very good building work, final product is top quality! Can’t wait to see it fly.

François

[Mezri]

Very Nice...

[Dwight Macdonald]

Very good work Michael! It will be interesting to see how it performs for landings.

Sent from my Pixel 2 XL using Tapatalk

[alanh]

I will be doing the same thing to my clipped wing cub. I will extend the wings to create more lift-It snapped into the ground like a fence post because it stalled during a slow turn into the wind. I will remove the wing tips and add about 6 inches of ribs on both sides and then re-attach the wing tips to give the wing the same dimension as the regular full wing cub.