Which mould release should be used when working with prepregs? We used Vax and it resulted badly.

I know you guys are extremely smart. But your “flaps” appear to be hardly so. That flap looks like an air brake, not a flap. I’m sure it develops some lift just by deflecting air downward, but it’s got to also significantly increase drag. Maybe that is what you wanted or needed for landing? But is seems to me that a proper flap, one that also promotes flow over the top (like airline flaps) would offer much higher flap performance. And when landing, the last thing I want is to have a flap that itself might be prone to stall. But like I said, maybe the plane is so good it doesn’t need but a speed brake. Some commentary on this tropic would have been nice, maybe it’s in another video. Anyhow, thanks for a great video!

Is it an experimental aircraft ?

How do I buy one

When dose it go on sale

What resin do you use?

Please get rid of that stupid music. We are all serious pepole here and want nto hear you, not that stupid LOUD noise.

Why didn't you choose a V-tail? what are the benefits?

So taking what I just learned, the best arrangement would be twin puller motors located at the wingtips. Clean air makes for high efficiency and considerably less airframe is exposed to prop wash minimizing drag. I suppose there "might" be some other factors involved. :)

*The German 'Dornier Do 335 Pfeil' PULLER and PUSHER had an experimental design element that connected the front and rear proppeller with a long drive shaft. It could take off with the front prop only and during flight a clutch could transfer all the power to the rear prop. The rear prop folded flat until it was engaged and the props opened up.*

Alternatively ... did you guys consider using sacrificial anode..? Or inconel (not much more than steel)..? It's supposedly pretty resistant to corrosion.

sad thing is thermal sensitivity of the room temperature epoxies their E performance gradually degrade from 60C to 100C high temp epoxies are hard to come by and are not easy to cure correctly

4:00 "right at the hing line" Sure, but a double joint... hmmm, I'll have to make sketches, but smoothing a wing feels doable, so doable that a split flap feels bargain basement. But if flaps are used a tiny percentage of flight time, yeah, maybe. LOL How many folks have searched the same possibilities? So the odds are low and I'm probably going to explore anyway

Winglets are not about physics. As you said, they'd function better if they were horizontal, as in "use a little longer wing with narrow tips". So why are winglets used? Airports charge based on wingspan, so fold your wing tips up; lower gate charges offsets the decreased efficiency, esp6 if your plane can be squeezed into a cheaper wingspan category. Then "looking modern and cool" took over and folks slapped winglets on everything. You did well to resist. Thumbs up.

this build appears to have gone silent...something must be wrong.

How's it going guys? Haven't heard from you. Hope all is well.

Because you never plan to fly. haha

Sorry to be that guy but without a post cure you won’t achieve full mechanicals with only an ambient cure. You also won’t have a very good Tg

I know the real challenge with CF or additive mfr-ing is that with aluminum, the first part is expensive, but the 2nd through 200,000 is far cheaper. Is the industry figuring out any methods by which to derive some sort of savings through volume ..? Aside from efficiency, knowledge etc. A quote I like which your point about testing reminded me of ... _The cheap man pays twice._ Really, they pay repeatedly until they either learn a ton or stop being cheap. Perhaps it should be: _The cheap man pays at least twice._

Is there an interlock of sorts that keeps the rudders from going into speed brake mode while in flight?

I’d also imagine cabin comfort would be improved with a pusher configuration because of reduced cabin noise.

That’s how Lear jet did their wing in the 60’s. They used that on all models but the 40 &70 series. Rather than a main spar and an aft spar, they went with 8 “spars” and the entire wing is one fuel tank.

Just wondering when another video regarding Dark Aero will be published?

Radio silence from you guys for a long time now. Are there problems with the plane, problems with the team, or just busy with last minute details?

SAAB J21

Nice, I have a haas mini mill on the way!

What does a sheet of this stuff generally run? Thinking about building my own air foil kit. Looking to cut weight.

this is such a cute airplane

Excited for this

What was the high temp resin you ended up using?

when are you going to fly it? its been forever since you started it.

In applications such as gliders, where drag minimization is most critical, the plain flap can be reflexed, thereby reducing the drag at the best glide speed.

When are you going to start flight testing?

Are you now truly dark aero, a defense contractor making killing machines for the genocidal US military?

Umm.. you didn't say how the rudders stay straight. A cable is great for pulling in one direction, but it can't push. Single rudders have the other pedal to push it back to center, but you didn't describe any mechanism that does that for your split rudder system. So.. ???

What's the fire resistance of your panels? Both carbon fiber and aluminum burn very well in air. Do you add a fire retardant into resin?

rich kids playing around in 2024

The UL Power engine does not have a hydraulic constant speed governor. Are you going to use an electric governor or just use a fixed-pitch propeller?

The UL Power engine does not have a hydraulic constant speed hub. Are you going to use an electric constant speed propeller or a fixed-pitch propeller?

One of the things I love about carbon fiber isn’t so much carbon fiber itself, which is great for space and aerospace, but other composites you can weave with it. What really interests me is the possibility of using it as a base and combining it with Carbon Nanotubes, Graphene, metals, and other components to increase either conductivity or insulation properties. Just think of Carbon Fiber as The Base canvas in a chemical factory. - Combining carbon nanotubes and graphene is hard enough as it is (and isn’t exactly as performant as todays best materials at all) but when you use other components based on properties, Now you are getting somewhere. The day where we have the right combination of cvd, and plasma sintering of carbon nanotubes, graphene, foams, with other components is coming- until then, carbon fiber acting as a base is the best we’ve got in terms of being able to make a carbon neutral to carbon negative material that’s useful across a Wide Spectrum. From CO2 and carbon farming- to a graphene carbon composites in Aerospace and everything in between that Everyone can use. All that, combined with renewables and hydrogen generation Can be the carbon sink we need to mitigate climate change.