Royal

9 minutes ago, Kent Ashton said:

Not practical.   No way to determine the expansion and the foam can be very porous.  A long airfoil could have voids.

i used some minimal expanding foam around some house windows and they are so tight I can barely open them       😞

Be nice if this worked.

https://www.fibreglast.com/category/Mix-and-Pour-Foam 

That's to bad. Maybe someday they can get a good two part foam to do that in. Would be amazing and fast to do.

has anyone use two part foam to pour into an empty fiberglass wing? Or is it to much pressure?

I'm drawing up all the bulkheads for  the open-ez and making them free to download. I'll also put the whole plane in 3D so people can look at it for reference if that helps. I think Illl have them on GITHUB.com so they stay up and another place so they don't get lost. Anyone wanting to help out in their spare time can. 

$12,000 will get you a Honda fit engine ready to drop in. Brand new engine is $5,000 from the dealer. 

I think more people don't built them because you do have to build everything and it seems daunting to a non-builder of things. I'm sure they are easy to build but for the people that started and then sold half finished kits would say otherwise. 

Well I have done so many restorations building parts from scratch and sanding 20ft straight is getting old. I wanna build an airplane but man. I started making fiberglass widebody kits that actually fit unlike some junk ebay is selling. Making an 8x4 sheet sandwich could probably be made in a day I think. It would be nice to get a build down to 1-2 years. Say you had the outside skins with the spar made in  5 sections, nose cone in 2, body in 2, canards in 2 and the alerions and small parts can be left for them to build. 

I did notice while putting them in CAD and mirroring the other side that it wasn't perfectly symmetrical. Is that something you have found on the open-ez? 

I started making templates for CNCing them out. I think if people wanted some bulkheads and foam/fiberglass sandwiches to hurry the kit along I might get my own cnc. I have been wanting one anyway.

Looks like the bumps were used so when he goes to make the two haves he can lay up carbon inside of it and have a really smooth join requiring little to no body work. When we had our rear ducktail spoilers made the guy didn't make them right. had a huge lip that needed bodywork on each one. We found a new manufacturer. 

What do you think takes the longest to do on a full build?

I started to digitally build the files. I think if most of the bulk heads are the same thickness you could make one sheet of 4x8 foam and fiberglass on one side. have the foam and all the other parts CNCed then vacuum form over top of the rest of the parts that need carved and cut. I think having a bulkhead kit for some people would save a ton of time. 

I have made some the same observations with CFD and watching cars and planes in wind tunnel tests. I think just by changing the canopy and putting on a few fillets around the wings and canards you can reduce lots of drag even without doing any testing. Obviously this will change a lot of things with the plane. power needed. trimming during cruise. Landing speed. 

I think the best thing to do is build an RC model and put all the certain weights where they should be.  Doesn't even need to have a round shapely body as seen the the Cybertruck except for that huge red flat part. 

Then there is the lifting body that could be incorporated into a design but that starts making it hard to see over the edge.

I think you could change the front just slightly to make it look better and more like a jet or even just an add on to the top. Idk. Be fun to just make a scale model. I need to find pictures of all the bulkheads for the berkut 360 and the Long-EZ.

Ah sorry. The other screenshot didn't load. I lined up the propellers because I ASSUME that's where they are pretty much the same. And yes the wing didn't move much but I do wonder why they moved it down slightly. I need to upload the other drawing I did over them.

Sure. I can make those. just need a wing profile to start if anyone has one.

I did some digging. The Berkut 360 is pretty much what I was going after. They lowered the wing a bit. I'm guessing only to get the landing gear to be retractable. The engine stayed the same though which I would have thought they would want it inline with the wing. 

For the landing gear I don't see why they can't move them back so the angle to the propeller is better when it rotates as seen in the second picture. I also wonder about the 3 blade propellers vs the 2 as far as size goes.

I know there is the long nose mod for the long-ez. Is it in this side view of the long-ez?

Spray foam cures with moisture. The pour foam is more like an epoxy.

Im just working on my CAD skills and want to get faster and find better ways to do things. I'm thinking a new instrument panel or something easy that you can build and upgrade your interior to look a bit more modern. I have a 3d printer if it requires some small details up to about 10X10X10 inches. Throw out some ideas. 

• If you dont want to do all that work you can get a 2015 acura RDX rear window seal. Its the biggest I have found. Double sided and and looks great.

•  

• Ref #: 002

   

  Rubber B, Windshield Dam

   

  Part Number: 73213-TX4-A01

  Mfg. Origin: 'USA' 

  Emission Types:
  KA - US - 49 State Spec

   

  • Retail price: $21.68

The X-29 had an interesting feature by the tail cone. It was like an elevator or some kind of flap to help the air come off the wing root. The AOA of the X-29 was insane. If they could figure out the wing flutter issue it would have been pretty amazing.

I think I'll find an accurate 3d model of a Long-EZE and learn to use the CFD better.  I'll also go into learning how to do the engineering part of it. I did use real airfoils from NASAs airfoil plotter. What I had intended to do was design off existing aircraft and known drag reducing tricks and some not used but I have seen tested. Probably why the GLASAIRs are so damn expensive and look so good too. I think part of what makes a plane or company successful is the end user experience. People cant be cramped or have crappy interior. A 152 may have vacuum formed plastic interior and kinda suck but its an interior none the less and the airplane preforms amazing for what it is designed to do. I think I need to get back to why I want to design this plane and figure out if there is something that can help the swept front canard in CFD or not. I did change the wing tip airfoil but I didn't add any twist to it. I'll read more on the deep stall. 

How do you get the model in X-plane?

That's pretty cool. Id like to get my rendering finished. We should work together.

With the amount of technology out there from cars I find it hard that more people haven't been using computers to keep the engines perfect. I know there is a builder using the k20 engines from Honda. 

But I also think with the foam cores that can be CNCed like the wings on burts planes this could easily be done on there. I have built plugs and molds for Anointed Aero and some other car projects. The pics are the plugs I made by hand then had them manufactured in fiberglass. 

OIP (1).jfif OIP.jfif

I built a small glider first. Worked pretty good...till the dog jumped on it after the kids looked at it. Easily fixed though.