Thursday, April 19, 2007

Blog Stuff: Random coolness from the intarw3bz.


(1:1 scale.)


phlegmfatale said...

Love it. I woulda crashed it in about 5 seconds, if that. It could be "weedwhackers gone wild!"

TBeck said...

It's like Airwolf on crack. How many RC helicopters do you suppose it took for the pilot to learn to do that?

kaylee said...

buh... wow.

Hey, how does it hover upside down like that? Do the blades on the main rotor change angle to provide reverse lift or something?

bedlamite said...

Kaylee, Yes the blades can change pitch up or down individually.

tbeck, you learn to fly them on a simulator. I'm at the point on the simulator where I can usually keep it in the air until I try something stupid, and I'm not willing to risk a $500-1K+ heli yet.

Anonymous said...

Yes, the blades do change pitch.

But look how fast he's making those pitch changes!

The guy is a real artist.


comatus said...

Mr. Towns...
a toy plane is something you wind up, and it rolls alond the floor.

A model airplane is
something totally different.

Anonymous said...

I'd like to know what the power-to-weight ratio is on that thing!


bedlamite said...

I'm not sure which heli he flies, but most FIA-F3C competition helis are right around 10 lbs ready to fly.

The engine of choice is an OS 91sx-H:
Displacement: 0.912 cu. in. (14.95 cc)
Output: 3.1 hp @ 15,000 rpm
Bore: 1.09 in (27.7 mm)
Practical rpm Range: 2,000-16,000
Stroke: 0.98 in (24.8 mm)
Weight: 20.5 oz (581 g)

That makes for 3-3.3 lbs/hp. You can usually pull a little more power out of the motor with lots of nitromethane in the fuel and a little tuning, at the cost of longevity.

DirtCrashr said...

I like the 1:1 scale - once had a housemate who worked on those, serious gnarly horseflies.

Gewehr98 said...

I can't believe the amount of lift he's getting with the helicopter's main rotor perpendicular to the ground!

It reminds me of the old joke comparing helicopters to female Texas divorcees - neither have any visible means of support.

triticale said...

I would assume that an RC model has the same controls as a full-sized helicopter, cyclic, collective, throttle, and some rotor control. Those really fast pitch changes are cyclic cranked way over. Hovering upside down is cyclic centered and collective pushed in the opposite direction from hovering right side up. Knowing all this does not keep one from being blown away by the application of these controls presented herein.