How do you do that thing?

[MaxDuracell]

Ya know where you are tumbling end over end? well not really sure how to descrbe it better than that, but i hope you get the drift. But how do you do it? And does any one know what kind of punishment ( aerobatic wise) that a DAW extra can take?

[flyfalcons]

I think you're referring to a Lomcevak or some other form of tumble. You'll need a plane with a short tail and large surface deflections to do it. I don't think it is too punishing on an airframe, but start out doing it slow and work up the speed.


There are many ways to enter a tumble. One way that works for me is this:

Going left-right, pull up to about a 45 degree angle and roll 90 degrees right. With the plane still going up, apply full left aileron, left rudder, and down elevator. The plane should tumble. Another way to enter is while going up 45 degrees, enter a left snap roll, and after one snap, hold the full left rudder and left aileron in and cross the elevator to full down. Fun maneuver! If the weather ever gets better here I'll put some tumbles on film.

[Smash McCrash]

Entering it with a snap is the way that I do it. But, I start with a 1/4 right/up snap and then cross the elevator. Just a FYI, the snap roll is very hard on the airframe. There were many full scale planes that were destroyed when they're engine mounts failed after too many of them.

Mike

[BIGSAPPY]

Now you tell me!!!

[Air-Gar]

Will an E3D do a Lomcevak?

[wildpalms]

From the video's I've seen it will do the tumbling type manoeuvres just fine. As for the Lomcevak I'm not sure, a true Lomcevak (of which there are many variations) relies on the huge gyroscopic forces present in a real aircraft engine which just aren't present in these small models.

--
Dave

[SkyPyro]

Here is an AMAZING video of Kirby Chambliss doing an airshow at Oshkosh. A little bit in, he does the smoothest lomcevak I have ever seen, full scale or models.

[SkyPyro]

Whoops I guess the file was too big. I zipped it, here it is.

[SkyPyro]

Well I give up on that:( Sorry about that gents. If you want to see the video, PM me your email address, I will send it to you. It is the most amazing airshow video I have ever seen.

[flyfalcons]

Here is a vid of my Extra, including a few tumbling maneuvers. Also has some 3D-style maneuvers that we have been discussing, including Harrier, Torque Roll, Knife Edge Spin, Parachute, Waterfall, and a Rolling Circle thrown in for laughs.

http://www.rcsites.net/flyfalcons/RyansMWExtra.wmv

[flyfalcons]

Oh, forgot to mention Blenders and Inverted Flat Spins are in the vid :)

[Rip-N-Burn]

flyfalcons


WOW!!! That is incredible.. Would it be possible to define how some of those manuvers are done, Like which way the sticks go.
I printed out a thread from here last week and took it to the field. It explained how to do flat spins. I tried it several times but couldnt keep the nose up to stay flat. Practice, practice,practice.

Thanks for sharing the video..

How many years of practice does it take to get that good.

Kenny...

[SkyPyro]

HOLY COW!!! That is a sweet flying plane. What plane is it? What engine did you use and what is the wingspan of the plane? Man, I need to get one of those :D -Dan

[flyfalcons]

Here are a few good articles on 3D flying, lifted from the Horizon site. They show how to move the sticks and how to set up the plane.

http://horizon.hobbyshopnow.com/articles/1022.asp
http://horizon.hobbyshopnow.com/articles/1033.asp
http://horizon.hobbyshopnow.com/articles/1044.asp

For the 3D style maneuvers, there is no real magic to it, just huge elevator throws. An aft CG helps too, but it doesn't have to be uncomfortably aft. A short coupled plane like an Extra helps, though there are many long-tail pattern style planes that can perform these maneuvers. Generally with fuel powered planes, you won't get good 3D performance until you get around 80" wing span and larger. Fortunately, most electric planes are quite light and you can get decent 3D performance with smaller packages :) . One plane that Harriers pretty well is the Gym-E. I had fun doing a Harrier with one in a gym, though it wasn't mine and didn't quite have the power to overcome all that drag. It would harrier for a little, then as drag increased it would start descending.

The plane in my vid is a Midwest Extra 300XS, which I built last winter. It has an 80" span and is powered by (Warning - not an electric ;) ) Brison 3.2 gas engine, swinging a 22x8 prop. I'm not sure what the electric equivalent would be, but you'd want 25-30 pounds of thrust from the setup. My plane's weight is estimated at 16 pounds. I built the plane stock, with the exception of double-beveling the elevators and rudder to get 40 degrees of throw. The ailerons are stock. If you aren't into building, the World Models Extra 80" is an excellent airplane. I've flown one and can't decide on a favorite between the two planes. The World Model Extra does have larger elevators, so walls and parachutes look better. It also has a two piece wing, but you don't get the satisfaction of building it :) . I have a Hangar 9 Extra with a 97" wing, and it Harriers better, but doesn't have the power/weight ratio that my Midwest does and I mostly use it for sequence flying. It is capable of some cool 3D maneuvers though.

The fun part about 3D flying is if you're really good at it, people will swear that you're in serious trouble trying to fly your plane and they'll think you're always on the verge of a crash. When you get the huge elevator throws it is really fun to experiment with the wild maneuvers possible. However, if you're going to yank the plane around, try to keep the speed under control ;)