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X8

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Latest Activity: Feb 14

Discussion Forum

Differential Spoilers on X8

Started by Lockhart. Last reply by Ray Anderson Dec 20, 2016. 5 Replies

Has anyone attempted this on the X8? The X8 does not seem to be particularly prone to yaw wobble. Nonetheless, yaw control would be nice to have. And, implementing differential spoilers would be an…Continue

Possible Composite X8

Started by Michael Levesque. Last reply by Richard Sterling Dec 5, 2016. 27 Replies

Hey guys! (and girls) I noticed a lot of people do love their X8 but they are pimping them quite a lot... Most of the time going above the max weight of the aircraft or going faster creating flutter.…Continue

Tags: airframe, question, possible, flutter, X8

Skywalker X8 Launcher Plans

Started by Evan Palmer Sep 3, 2016. 0 Replies

I recently built an X8 launcher and thought that I would share the plans. The legs are removable, but at the moment, not adjustable. The trigger isn't anything special and I hope to modify it…Continue

X8 Stall/Spin Crash Stories, and how to prevent them.

Started by Paul Hansel. Last reply by Gabor H Feb 22, 2016. 29 Replies

Hello to all you X8'ers,I'm opening this discussion to find all of the optimal flight parameters for an X8. The parameters I'm trying to pin down to make an X8 fly as optimally as possible are listed…Continue

Tags: stall, spin, flying, wings, .tlogs

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Comment by Richard Sterling on December 7, 2016 at 5:09am

Hi Tommy, thank you very much. I haven't had a chance to open the zip file yet but it downloaded perfectly.

Thanks again,

RS

Comment by Tommy Larsen on December 6, 2016 at 4:44pm
Comment by Richard Sterling on December 6, 2016 at 2:24pm

This will be long term project. I hope to have the first assembly complete and flying in May 2017. 

Once I have everything where I'm happy I'll produce a couple for further testing.

This isn't a commercial exercise but if anyone wants one I'll be happy to offer them. Anyone that helps through the design process will be at the top of the list.

Thanks again everyone. 

Comment by Richard Sterling on December 6, 2016 at 2:19pm

Thanks Roger, I'll have a look. I'm really interested in a blended wing for this project. I picked the x8 as a test run as its well known and people have plenty of hours flying experience with that wing. Meaning I can get a lot of feed back on the short comings, effectively helping me to learn.

Thanks for your input. 

Comment by Richard Sterling on December 6, 2016 at 2:16pm

Cheers for the advice Ronald. I'll have a look at the foil and run some simulations and tweak it accordingly.

Had a quick look at Alta Devices. They look very nice, I'll have a chat to Rich Kapusta when I'm in the final stages of the design.

Thanks again.

Comment by Ronald Pandolfi on December 6, 2016 at 2:08pm

Check with Rich Kapusta of Alta Devices for their latest gallium arsenide solar sheets. They are extremely thin, flexible, and efficient. You should get about 20% conversion of available solar power so size appropriately for the power you need at cruise.

Comment by Ronald Pandolfi on December 6, 2016 at 2:06pm

I would not recommend at X-8 design for carbon or fiberglass composite. The X-8 design is based, in part, on the limitations of EPO foam, so the airfoil is rather poor. Fiberglass might be a better choice than carbon for an X-8 size aircraft.  In that size, we often 3d print using an EOS SLS printer with a mix of nylon beads and glass filaments.

Comment by Richard Sterling on December 6, 2016 at 1:51pm

@Brandon: thanks for the suggestion. I think Tommy might have the models in CAD.

Richard

Comment by Richard Sterling on December 6, 2016 at 1:50pm

@Tommy: Hi That would be very cool. As I mentioned I plan to modify the design to take my payload.

Once I have the design where I want it I will CNC the patterns from Epoxy tooling block. The mould tools will be laminated from carbon in an autoclave.

The final components will be a carbon epoxy matrix autoclaved processed.

As I mentioned I am planning to have photovoltaic cells laminated into the upper surfaces to extend the flying time. I'm not exactly sure how much energy this will generate at this time I will know more when I get the model and can calculate the surface area. 

Cheers Tommy.

Comment by Roger Monongo on December 6, 2016 at 1:44pm

If you're open to other models, you can try this:
http://aerofred.com/

 
 
 

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