It's only a matter of time
#8
Senior Member
RE: It's only a matter of time
ORIGINAL: papaone
Helllo
What a surprise but she flies
http://triple-m.net/nc/en/modellbau/...trigantic.html
Helllo
What a surprise but she flies
http://triple-m.net/nc/en/modellbau/...trigantic.html
The dimensional limit up is 2 meters. The box is a 2 meter cube....unless FAI changes the rule (doubt that)
Last edited by MTK; 08-07-2013 at 06:40 AM.
#10
My Feedback: (34)
Wow. Seems like original aircraft design has come full circle. Back in the very beginnings of powered flight, people thought more wings made an airplane fly better. Hence, there were some really ridiculous examples developed with 5, 6, 8 wings or more. I applaud Mayr for trying new things, but at those wing-loadings, the airplane will NEVER truely snaproll (although I suspect nobody really cares anymore), and the aerodynamics of that setup are going to be hell to trim for precision flight.
#16
Senior Member
Geez, I suppose we've been flying crates flatter than pancakes, no height to 'em at all
#17
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FAI rules for F3A only refer to length and span, height is free until somebody builds something that's luducrously high with a perceived performance advantage.
An X-wing design would allow a span of 2m, height of 2m with a real wing length of about 2.8m. Getting it under 5kg would be tough..
#18
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According to Mayr's specs this thing is 4.65kg, with a 1kg battery. Not many 1kg batteries out there... not yet anyway.
Not to dredge up the whole 5kg/2m rule debate, but isn't it amazing the innovation and evolution that are occurring within those simple constraints?
Not to dredge up the whole 5kg/2m rule debate, but isn't it amazing the innovation and evolution that are occurring within those simple constraints?
#19
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There's a guy at our club that tried flying one of the pogo-style X ARFs (the Depron one, not the scale one). It flies like crap. It doesn't even behave like an airplane.
-l2t
Last edited by learn2turn; 08-16-2013 at 07:07 AM.
#20
Senior Member
The way F3A schedules have evolved, a triplane (and soon to be seen quadriplane with a twin cylinder gas engine up front) was inevitable. It is a straight forward way to minimize wing load. Consider the tripe has around 1500 squares and weighs 11 pounds. Loading is a scant 17 ounces per sq foot. Not quite foamy like but much closer. Also consider the quadriplane with it's 2200 square inch wing.....a wing load of 11 1/2 ounces per square foot. That's foamy territory
The dimensional limit up is 2 meters. The box is a 2 meter cube....unless FAI changes the rule (doubt that)
The dimensional limit up is 2 meters. The box is a 2 meter cube....unless FAI changes the rule (doubt that)
Should be simple to play with one made out of foam. The side area this concept introduces is greater than anything done to date. Should fly about the same in all attitudes with similar control input. If I had some foamy gear laying around I just might try it. BUT I don't so if anyone is so inclined, try the idea in a foamy and report in the K-Factor. Of here since this forum is more visible to the world
#23
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I watched it at the worlds and I have to agree with your thinking Doug, it really doesnt snap or spin well. I wouldnt think he would have added a third wing to try reduce wing loading as that doesnt seem whats needed in F3A. The KE edge capability is what is being tested with the new generation schedules. Maybe he was hoping for improved straigtening of air flow over the fuselarge for better KE effeciency. Maybe all the wings need are very narrow tips and sharp LE's to help stall the tips. Even the bipes struggled with the inverted KE triangle loop in the unknown schedules, especially in the strong winds. The top base of the triangle being downwind meant that the pilots had to apply abrupt rudder to get through the downwind 135 degree corner. Very few of the top 10 managed to keep the wings on edge during this as the planes get very squirrely. It would have been nice to see how Mayrs plane handled this but he unfortunately didnt get to fly the unknowns.
Jase
Jase