Fyling RC helicopter INSIDE a 40 ton truck - what happens?!

[TiagoTiagoT]

I wonder if it would have been much different if the back door was closed

[heligraphix]

@TiagoTiagoT No, same situation, no significant difference.

[TiagoTiagoT]

@heligraphix Really? I would think th opening would affect the turbulence inside the the truck is moving, and the door would reflect the wind from the rotor. Did you guys try it?

[heligraphix]

@TiagoTiagoT This is correct. However, there was lots of turbulence due to the rotor wind already, and any additional effect due to wind reflection from a closed rear door would be minor; this is because (a) the door is further away, and (b) because in between are a chair, 2 persons and a camera which all diffuse the airflow.

The same diminishing effect goes for any air turbulences caused by the open door: It will not reach far into the truck at these speeds. Yes, we did couple test runs.

[adropbear09]

100% skill right there people's

[bass25]

That was impressive!! Never seen anything like that before. Now I have seen it all! What heli are you running? Looks like a 450e.

[HeliBenj]

Incredible reflexes, very cool vid.

Don't try this at home!

[mikesjunk]

so are you actually flying the helicopter forward or just hovering for the most part?

[heligraphix]

Unless the truck accelerates or brakes there are no extensive elevator corrections necessary, so basically this would mean hover. Problem is that before the curves the truck had to brake and afterwards to speed up again - we're not sure if this was worse for the heli or the guys in the truck (you'd never believe how hard it was not to be pulled off that chair simply by centrifugal force). Also the air circulation inside the truck made the heli additionally unstable. But in theory: hovering.

[mikesjunk]

this was like a mythbusters experiment where they put a bunch of birds in the back of a box truck. the theory was that if the birds all started flying, that it would reduce the weight of the truck. But i was wondering how the helicopter was able to stay in place without having to fly forward, when in actuality it was moving with the truck around a parking lot. ???? this wouldnt be true in an open pickup truck... Im assuming because of actual wind resistance that it was possible?

[heligraphix]

True in theory. When the birds fly and the air can flow "out of the truck", its weight will be reduced. In a boxed truck the situation is somewhat different, because each bird will cause a downwards flow of air with a certain momentum which, in turn, will be reflected off the truck's floor (this means double the impulse acts on the floor; same like with photons reflected off a mirror, remember those school lessons! :-) ).

[mikesjunk]

now that i think of it, its like throwing up a tennis ball inside of a truck like that.... its not going to fly out the back, so i guess its the lack of wind resistance thats allowing for the helo to stay in place and move with the truck rather than flying out the back

[heligraphix]

Exactly. As long as the truck does not accelerate in any direction (including negative accelerations = braking), no forces act on the heli, thus it will hover stationary. Otherwise, when the truck accerates, it moves while the heli still remains stationary - in the coordiante system of the boxed truck, it then appears the heli was moving. However you want to look at it, in the latter case corrections are necessary.

[cdaleracer669]

haha a bunch of close ones!

[vxgas123]

hammer geiles video, das ist können, der absolute wahnsinn!!!! 5*

[skyhobbies]

thanks for the nice video, you have balls of steel Tobias!

[bretuk1]

Cool

[hbk2flyer]

LOL, found the elevator vid. Very good! And silly. I love it.

[hbk2flyer]

Not sure why, but this was fun. What's next? Elevator?

[heligraphix]

That was the worst ride we can remember ... staying on the chair was a real challenge in the curves, especially when the trailer was shaking heavily at the same time. Absolutely worst was the breaking maneuvers; it felt like a gigantic magent was pulling you off the chair.

Elevator: Done already, but not available on YouTube! Go to the website, then to Download; choose "Maya The Bee" stunt no. 3.