Ever seen a B52 take off. The rear always gets off the ground first

Do us some new videos about vtol

Not neccesarily, the thrust lines of the engines could be an issue. When they are at the upper level of the aircraft's thrust/drag lines the engines should have up-thrust. Check out some of the amphibious aircraft designs with high mounted engines, they all have up thrust. Great trial.

Exactly what is a "work man", and how does an awesome "work man" differ from a regular "work man"? Eaten any grandmas lately?

@@vumba1331 I always wondered about the angle especially with sea planes.

Yes rip samm he did very cool stuff

Yes Sam is a legend 😇🙏

I started studying engineering thanks to his inspiration

⁵0 to 0

RIP Samm, I loved his channel.

Yeah, having the bottom 2 wings an a switch to level them out would be sick.

Wouldn't that have to be forward, given it's already tipping forward when accelerating...?

I was actually thinking, add a servo and linkage to collapse the lower two wings into the top one. The linkage would be a pain to calculate though...

this is staring to sound like some kerbal spaceprogram level engineering now hahah

@@markp5726 They'd basically be slats and flaps at that point. What youre describing is exactly how aerospace engineers decided to do it on large planes.

When i was a kid my friends dad had a biplane, and i remember going for a ride in it. He though it was hilarious that we could fly slower than the traffic on the highway... I think the stall speed on his plane was something like 40 mph... It was pretty cool!

Peter stripol made a walking speed rc plane, was super cool

It's all relative since the lower your weight the lower the lift needed to maintain trim

Anything is possible with enough headwind.

Search vought v-173 flying pancake should be what youre thinking

What happened?

@@GS-qw9cc He sadly passed away in a single vehicle motorcycle accident. His father has a video on his channel: kzfaq.info/get/bejne/i7ukh9Bqx8uUZ5c.html

Yah man I thought the same thing when he mentioned his name. Gone so young. RIP Sam🙏

Fly high Sam, forever

@@Guffy1990 my heart sunk when I saw his father in front of the camera

Это точно!

How did he die?

@@whitewolf6605 he was driving his motorcycle uphill on road where he used to speed up, but that road do not allow you to see what is at the top because the road surface up there gets suddenly horizontal. Unfortunately a new round about was built up there and he didn't see it in time to break safely, he crashed into it and died three days later....he left behind a loving family, a pilot carreer and a girlfriend that he had just started to date. RIP Sam

Will soon be starting in CU boulder aerospace engineering program, I count Samm Shephard among my inspirations

omg fellow fluids jerma nerd

I agree, we all meet here ;)

What a legend, rip Sam

There are several effects with the slotted flaps. They are actually called "Fowler" flaps Typically 2 to 4 stage (2 to 4 sections) You can have just one. The flap not only rotates, it is pushed back. This combination opens the slot. It also effectively adds wing area, because in the retracted position, the flap sections overlap each other. Pushed back they expose more surface area. air from underneath is forced through the slot due to pressure differential below vs above the wing. This accelerates the air over the flap. It also helps "lock" the airflow over the main wing panel in a near laminar flow. It helps delay stall. Then there's the changed curve to the effective airfoil, taking a high speed airfoil and converting to a low speed, high lift airfoil, when you consider it as having a continuous curve. The majority of affected air is using this curve. It has long been well known that slots of assorted natures can improve low speed flight. But they add a LOT of drag. There's also a weight penalty involved. Everything about an aircraft is a compromise. Trading increased weight to get strength, increased weight to get more power, increased weight to gain range... Wing shapes are trading between lift and drag. Being able to change the shape of the wing in flight means you can have the low drag shape for cruise and the high lift shape to reduce take-off and landing speed.

Humanity is involuting... losing cognitive abilities. This video is the evidence.

Absolutely, that was a wonderful perspective.

I was about to say, and I missed this in the rctestflight video, I'm wondering if he knows that Samm passed away. Rip Samm.

His legacy lives on in his videos 🙏

@@MarinusMakesStuff he knows for sure. I think

Wait this guy died?

@@Lotek117 Samm shepherd, not rctest.

there's a ton of that on the older flitetest youtube videos. have a search. there's even a interview of guys on their stuff back in the day.

i think he already has some videos on the basics, however they are really old now, still relevant but not as good filming as his new vids. also sam shepard did a video on the basics of main rc components so you should check that out too

Yup we need more there can always not be enough of knowledge

neets a t tail. or 3 surface config with canards

Are you saying they currently don't learn this? Because I'm an aero engineer at uni and we definitely did learn this stuff lol. Brilliant video though

@@BlueRadox there's 2 ways of interpreting that comment, it might mean college students don't learn this stuff so they need to or it could mean they do learn it since they need to. I think OP meant the latter.

I think so too, there's a reason we abandoned the biplane as the dominant type. But this looks awesome, so I don't mind. :)

Couldn't you change the angle that the motors are mounted. I believe RC plane motors are mounted a few deg offset to counteract the propeller rotation causing yaw.

It is also probably due to the propeller wash increasing the lift on the wing, and hence the pitching moment.

My guess is that, as the "slatted" effect reduces stall speed it would, out of necessity, have to fly faster.

Given how short these wings are, that would probably just make it a reguar plane. It would likely increase the stall speed, increase the bending moment at the wing roots (increase weight if this requires additional reinforcement), decrease drag signficantly (less induced drag due to the higher aspect ratio; less interference drag; less pressure drag due to decreased area in the direction of flight).

@@qayray I agree. That's a short and sweet assessment.

@@veloxsouth that aerospace degree of mine has to be good for something! Even if its just commenting on KZfaq videos 😂

Search for Al Bowers flying wing for eye opening info on how birds "do it".I am an airline pilot ,ex HGlider and PGlider and i found his theories(based on Prandtl/Horten) and experimental models fascinating.

Or angle the motors up. The axle of the motor, if virtully lengthened, should run exactly through the CG of the airplane (not the CG of the wing!) minus 3 degrees, to counter any pitch effects on throttle. If he lowers the motors on this airplane, the props will hit the ground. So either angle the motors or put a landing gear on it and lower the motors.

Hopefully not Boeing, that would corrupt his ingenuity and innocence! His own start-up and keeping things innovative without corporate shenanigans affecting decision-making!

Crazy idea, but I think its worth trying

Great idea

Then yet again, the Simpsons predict the future... If that Simpson's prediction comes true in full, I'm no longer getting on a plane.

It's slotted flaps, but the whole wing is flaps lol. Sounds like fun

Look up Scrappy Bush Plane a guy did basically that.

"All it takes is money" It can be done. The design work takes time (which equates to money... trading $$$ for labor.) It might not be practical due to the structure requirements which might either use prohibitively expensive materials or add excess weight. It takes a lot of strength at the pivot points when you want wing that can rotate in any way.

I think it would be absolutely *amazing* for amateurs/children/indoor flight! Imagine if it fly at just about walking speed! You could loiter very well, you could actually fly it indoors in a larg house or definitely a school gym or something. You wouldn't need as much space to fly at low altitude so city kids could fly it at the park, and crash speeds are much lower reducing injury to both people and aircraft! It might be fast, but it's *very* useful! I wonder if inflatable wings could work on this design? It could reduce weight and increase crash resilience.

There is enough rigidity, except when it crashes.

Your last point is exactly right! To maximise efficiency you want to maximise the lift to drag ratio. Above a certain point it is not worth it to increase lift anymore, because it comes with a larger relative drag increase. This is also why aircraft don't extend their flaps and slats during cruise flight, they only use them when they need more lift for takeoff and landing.

@@kianheus2487 that's very interesting, thanks!

Efficient is a dependable, if you want lift then you cause drag to forward force. So when you have more lift then your plane need more energy to go forward, and vice versa. So in terms of efficient, you need to know motor prop thrust combo and translate that efficient to get exact lift so the drag not holding back the power. Rule of thumb the more airfoil generate lift the more drag they will produce to cruise. So if you targeting to get on the air as long as possible or even hover the plane that might be right term for efficient, but if you want to go from A to B then my explanation above is more efficient

@@ZuNunchaku By definition, the efficiency of an airfoil is the lift-to-drag ratio, it is not debatable. What you are talking about is mission objectives, that is what you are trying to achieve with a certain design. A multi-slotted airfoil is horribly inefficient, but achieves the objective of flying vey slowly.

@@nicholaslau3194 Read carefully the question, he said "the plane is more energy efficient" not the airfoil. There is lot of term of efficient, for example motor-prop-cell efficient, airfoil efficient (as you described), wing area-material wise, etc etc. And my answer is referring to the questions, whereas plane efficient

Moving the aft wing up (this is essentially a tandem wing. Between "conventional" and "Canard") will reduce the low speed lift, but might avoid a nasty bad habit of tandems with the wings close to each other.

Engines at the tips could cause some yaw issues. It may be better to mount the engines lower to counter the nose down when throttling issue. The T-tail may make the elevons more effective as there is less downwash from the wings.

@@nicholaslau3194 wouldnt the engine flow going in the wings cause the pitch problem? Maybe puting the engine away from the wings would solve the problem. But yes, lowering the engines would be already a good idea, if you ignore clearance from the ground.

i had a fucking stroke reading this.