Aerospace engineers and their toys! - 2

[anirudhhhh]

the planes with wings and elevator shown in the video

How much do they weigh ? and Where is the CG located ? 

[danieldawson97135]

how do they fly?



[MrKaikon]

how do those planes fly???

[AbsoluteMathematics]

Super Cool at first I couldn't believe it lol but it all makes sense with the board and such! thank you for posting this.

[MrAstronomiebahner]

it´s just fun and cool

[parkeryoung]

i like the one with the working propeller. i have seen a lot of walkalong glider's but none with a propeller. that made my day

[MrMiko99]

I am going to make one using foam

[PhuckYoui]

Aerospace engineers always--ALWAYS--cross their arms left over right...

[boxofcrap1]

did u make these airplanes if so can you show me how in vidoe or something?

[Hero00]

im srry im confused. do they initially throw them to get the planes flying, and then they use that board to control the flow of air or something? I've recently been interested in aerospace engineering, and i plan on choosin it as my major next year.

[HavenMade]

To answer your first question, there's no need to throw the plane because the upwash of air from the board while walking forward allows you to let go of the plane without a toss. Your other question about controlling the airflow is answered in more detail below.

[muchadoaboutnothingg]

Were the card boards used for direction control?

[HavenMade]

Yes, you can "influence" which wing gets more updraft thus causing the aircraft to bank slightly. Because they are directionally stable they follow along in a coordinated turn quite nicely. Good question.

[shaunny1992]

would you recommend aerospace engineering? is it very versitile or much of the same thing every day

[HavenMade]

I worked at Boeing for 16 years and became very specialized, but it was never the same everyday. I work for a smaller airplane company now and my days are even more diverse. I'm not bored for long.

[olli54321]

would you mind publishing some blueprints or closeups of those wonderful little planes?

[Jonnyboy323]

The Red Flying Wing by David Aronstein seemed to always go toward the bystanders on the left side after it crossed the string....

[bosshogg013641]

whats the paper for?

[shaunny1992]

Im guessing that when they move forward the air gets angled upwards which keeps the aircraft afloat, and im guessing that the planes have got tilted wings or somethings that propell them forwards, did i explain it good enough?

[HavenMade]

Shaun - you nailed it about the air getting angled upwards and keeping the aircraft aloft. And yes, the wing incidence is different because of the updraft, but it's propelled simply because the updraft has a forward component. Also, the tail size and incidence are tuned so the aircraft doesn't stall but remains slightly nose down. I wish I could post blue-prints here in the comments section. Sorry I didn't answer this question sooner.

[shaunny1992]

I feel so proud xD

[canadianmaple09]

This is why as kids aerospace engineers had their lunch money stolen and were constantly given wedgies.

[HavenMade]

Dude, won't remind me of my childhood like that. It still hurts :)

[HavenMade]

Let me talk to my coworker tomorrow and I'll try to get you a good answer.

[BlackTalon53]

very cool and wonderfully geeky!

But: Some close ups of the planes would have been nice!

[fluffycottncandi]

i liked the plane with the propeller :)

[johnmor2329]

These would be great projects to interest kids in aerospace!

[estevan300]

That is so cool i want to know how everything works

[Freddythethird]

the biplane is so cool!

[gliderguider1]

These races are great! Were you able to get video of race #8 (sumo event) by chance? I can't wait to race all of you down there....

[farfennoogen]

cool video :) definatily dig the planes .... and the different designs :) im really interested in making the model that looks like the a6m zero ... very good work all of you :)

[dookiekong007]

wait, those boards are supposed to keep the planes flying?

[HavenMade]

Yes, that's right. In simple terms, when the air is forced up and over the board it changes the angle that the wing "sees" the air coming. Since the air is coming in at a steeper angle it creates both lift and thrust. Hope this makes sense.

[dookiekong007]

oh yes, it did, i dont no how but by just lukin at the vid, i can tell how it works, but i asked you anyways cuz i wanted more detail, thanks anyways

[Zoidberg227]

Coming in a bit late here, but basically the gliders are ridge soaring on the poster board? I wonder why I never thought of this when I was a kid ... I'm buying some toy gliders and poster board tomorrow ...

[zsurfer]

Very nice to see you in action. I could only imagine what one of your events looked like. Nice to see all those designs in flight!