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Thank you!!!!!

Thank you for these videos very much!

If you cut a hole in the base plate under the 'R' you could have a bar run down to a foot pedal. With a little extra geometry, that could also power the compression for the bend. Much like a shrinker/stretcher in automotive body work.

So, given how much time you have spent forming this style rib, do you think this is still faster than building the rib similar to multipart Ultracruiser rib?

I'm loving your content, I'm interested in developing an ultralight myself. I want to replace a wood and fabric wing design with aluminum and fabric. Have you read "Sheet Metal Building Basics" from the EAA store? If not you should, lots of great information well presented. In this video you mentioned using 1/8" rivets through 0.016" skin. This is too large a rivet for the skin thickness. Chapter 19.4 states that the rivet diameter to thickness ratio should be no greater than 5.5, otherwise the expanding rivet will locally distort and buckle the sheet. For 0.016" sheet the largest diameter rivet that can be used is 1/16". See Table 2 on page 19-4. I have not been able to find 1/16" pull rivets so it will be necessary to use solid rivets. One other comment. A downside of starting with a large sheet, bending it, and cutting out lightening holes is that it results in the most scrap so it adds considerable cost (the need to buy more raw material for the same end result). While I agree that the 5 piece nose requires making more parts and using more rivets to assemble them, the parts start as straight rectangles that then get bent into shape so there is much less scrap from the raw materials. If solid rivets are used they are cheaper, lighter, and stronger than pulled rivets, but they do require different tools and learning the techniques to install them. If your ultralight is going to be primarily aluminum then the one time cost of the tools will be small compared to the number of rivet you will need to set so using solid rivets where ever possible will ultimately cost less, be stronger, and weigh less.

Very cool! Thank you for sharing this. My experience with hydro-forming is that, yes, different thicknesses will definitely have different springback angles. For a given alloy and heat-treat, thinner metal is springier and needs to be over-bent more, while thicker metal is less springy and will come closer to just staying where you bent it. This makes sense if you think about it; When you bend something thick, the stresses that you put on the outer and inner surfaces are much higher (i.e. more yielding will happen) than when you bent something thin, if you think of it in terms of "beam height". Anyways... I'm a huge fan (currently also developing my own ultralight), please keep up the great work!

I wonder if you stuck something like a ring sizing mandrel on the outside or " feeder" side, it would take a flat slat and begin the curve on a consistent basis.

Thank you

Thank you

Thank you for all work and dedication. Highly appreciated !!

7:29 I’m noticing that the laminar airfoil also appears to reverse its curves near the trailing edge so that the reuniting streams have a closer angle once they rejoin, probably inducing lower drag, perhaps similar to the effect winglets have.

Usually fly in and camp with plane, this year driving our "other rv" and have a decent solar set up, think we can live without air. I know the generators just scream, even in the just till 10PM areas, so thinking of our 32' rv parking in no genie area? Thoughts, think that would be a mistake? Sure would enjoy not hearing genies, thoughts?

Unnecessary part's and labor.

what are the design considerations required to design horizontal stabilizer in helicopter

You could have used bondo instead of drywall once you had the fiberglass over the foam. (I think bondo will attack bare foam).

For anyone watching, amine blush is water soluble. Use ample water and a mild abrasive (like a scotchbrite scrubbing pad) to remove it before sanding. Don't use alcohol or acetone or other solvents.

When you talk about maintenance these 2 stroke engines can fail very easy and also you may have a new engine but there could be a flaw with the metal use in the engine and it fails . I have seen ultralight aircraft were the wing brackets had big scratches in the corners I fixed it and the brackets that hold the rudder peddles on had 3/16 pop rivets in 1/4 holes and it was loose had to fix that and a few other things . Been an engineer if you have to do maintenance have a full check list record the maintenance and always every few month contact the manafacture or some that has the same plane and ask of any problems they have come across . And the way I see it I’m going to build an ultralight and I’m putting a parachute so there is the protection should something go wrong

I take it this video was taken the Sunday before the start of the airshow, right? People are coming in looking for spots, first come, first served on that Sunday?

hi. by any chance, do you have forum or group for ultralight design maybe on discord or something? thanks in advance

Given then number of changes you want to make/have made, are you going to build a 2nd model or re-build the first model to verify the changes or just assume they will be good?

this rocks! i didnt know you could use safety wire for this purpose

Add a turnbuckle to the tension cable or easier adjustments, and relieving tension for storage.

As you have intent to paint, instead, in your glass smooth mould, paint two layers of gelcoat in your desired color, then a 90gsm cloth, then two 200gsm, then a core with built in flow channels, then two layers of 200gsm.

Thanks a lot man

Great job but can you explain permitted and not permitted

Excellent job, congratulations

I love your videos. Can you do a tutorial on XFLR5? I can't get that single CL vs Alpha plot to show and see the coordinates in the upper right corner.

Great work sir!

Boeing isn’t good enough to fly WO parachute! What make you special? Great show!

Again my comments keep disappearing, might be in your 'flagged for review' section.

Excellent work 👍🏻

I paid way too much for butyl tape on Amazon only to have it come alive while reinstalling the windows on my camper shell. What a mess I made. Now I plan to use it for vacuum bagging a surfboard so your video is very informative. I’m interested in using pvc pipe for sealing edges. I like that there are people like yourself who make videos of their whacky projects. Thanks man!

You missed a great part of the ultralight flying in the mornings with all the ragwings in the air

Great info. Moving the reference point for aggregate moment along the wing seems harder than just adding each lift x arm for each station outboard of the calculation point.

Awesome video, can't wait for the load testing!

Carbon fiber will solve a lot of problems

Toooooo much pounds pounds pounds … not basics knowledge!

Why not just use the nichrome wire from the space heater you got the power cord from? Is there a benefit in using stainless wire I’m missing?

you deserve more views, excellent subject matter

Thankyou

Too complicated for my dumbass, but you have a lot of smarts and I enjoyed.

Dynamometer+ long spring would be good

Your channel is awesome! I have been following your design process for a while and I am loving it. I am trying to follow this video but I can't seem to find JBlade anywhere, do you know if it's been deleted?

Loved the vided, but one production suggestion, turn down your mic gain - you are overloading your preamp and distorting the audio a lot. Hard to listen to it.

A lot of this video could be cut out to just one video also where is the comparison with the aluminium sheet which is the reason for me watching.

Interesting video. If you intend to replace aluminum sheet metal you may have sufficient thickness of sandwich to eliminate some of the bulkheads including rivets. This gives you some reserve if you simply compare the sheets.

You are a friggin'' genius! It is one thing to understand fluid dynamics but to explain it to a moron like me so I can understand it a rare talent. I am surprised you aren't teaching at Embry Riddle.

What I have questions are how to make the power supply.

How is the dynamic pressure lower on the top of the wing if the speed of the wind is higher up there

Hi! i dont quite get how the geometry of an elyptical Wing functions. Specificale the "Edges" confuse me. Dos the Airfoil Linerely narrow down or does it just get ajusted to the resulting chordline?? And how would you support that structure? i guess you could bend Tube at the leading edge, but what would you use at the trailing edge? can you maybe use a tube as well and ignore the resulting radius at the end? Alos how does the tip narrow down and how would you build it?? I'd be very gratefull for an explaination!