Hello Red,

Any updates regarding the release of the 32" and 13" Prandl-M OML CAD ?

Thanks in advance for your response.

Originally Posted by 3pa

Eclipson PRANDTL wing model for Real flight simulator 7.5 available for free
Like and download it here: https://www.knifeedge.com/forums/ind...ndtl_ea.26574/

https://www.youtube.com/watch?v=XeNRTjEHbbk

This looks awesome. Any flight footage yet or comments on its flying characteristics?

Originally Posted by aerialthings

Hello Red,

Any updates regarding the release of the 32" and 13" Prandl-M OML CAD ?

Thanks in advance for your response.

Unfortunately we are still on work from home status. I haven't been to work in over 100 days. Let me see what I can do.

Red

Originally Posted by TTN

This looks awesome. Any flight footage yet or comments on its flying characteristics?

No video yet, we have been flying the original design but it doesn't fly well, we clearly have adverse yaw,  we designed the wing to fly faster than the original since this is a motorglider model, this mean that the torsion required was less, that modification seems to reduce the proveserve yaw more than we expected , now we are printing a second version with the same lift distribution of the original design.

We are also using this design to test if it makes sense to print it with LW-PLA and cover the wing with fiberglass to achieve a light and durable 3d printed plane, so far the results are pretty good. 

Originally Posted by Alien_Tech

Unfortunately we are still on work from home status. I haven't been to work in over 100 days. Let me see what I can do.

Red

Are these still on course to be included in the next Mars shot?

Originally Posted by Stuart A

Are these still on course to be included in the next Mars shot?

Well the next one is soon, so no. We're hopeful for 2024, but nothing is solid yet. Still very much a research project.

Red

I’m curious about elevon differential and it’s importance on this wing. I assume the downward elevon would cause a braking action negating the proverse action?

Originally Posted by lw_hughes

I’m curious about elevon differential and it’s importance on this wing. I assume the downward elevon would cause a braking action negating the proverse action?

You want zero differential, not necessary at all on a BSLD wing and actually a hindrance. Remember, you have up wash where there would normally be down wash. Differential will make the adverse yaw worse.

Red

If you build one of these even close to BLSD and when flying you have adverse yaw it means either you need more nose weight or you are flying too slowly --- probably the nose weight.

We were not flying slowly, I agree with the nose weight, we already have the V2 printed and the CG more fordward. let see what happen

Thanks Red!

Originally Posted by Alien_Tech

Unfortunately we are still on work from home status. I haven't been to work in over 100 days. Let me see what I can do.

Red

Thanks Red!

Originally Posted by Alien_Tech

Unfortunately we are still on work from home status. I haven't been to work in over 100 days. Let me see what I can do.

Red

V2 flies much better! The C.G. has to be really fordward!

Now the files are available at our page: https://www.eclipson-airplanes.com/prandtl

PRANDTl flying wing - 3D printed - Flight video (2 min 13 sec)

Nice job

Red

Originally Posted by 3pa

V2 flies much better! The C.G. has to be really fordward!

Now the files are available at our page: https://www.eclipson-airplanes.com/prandtl

Regarding this model, I'm not really a 3D printer kind of modeler, my background is balsa and more latterly carbon fiber and making moulds.... but could you advise what the cost of printing this model would be if I could not get a printer?