Can someone explain how do you perform waterfall and how do you set your plane for such
manevoure? [img]i/expressions/face-icon-small-tongue.gif[/img] Vilo

I believe the waterfall is similar to the tumble called the "Endo" in the full size world. The airplane ends up translating sideways while flipping over foreward several times. To do it in a full size Extra 300 you pull the nose up 45-60 degrees, roll left 90 degrees (climbing knife edge with the left wing down), push in left rudder smoothly while feeding in a touch of left aileron and smoothly feed in full foreward stick. The yaw rate from the left rudder creates a gyroscopic reaction that "Helps" you push the nose foreward.... once it starts to go it locks in until it runs out of energy... usually 2 to 3 flips. The biggest mistake is jamming the controls in, anytime you are trying to "Harness" gyroscopic forces you need to be smooth and slow on your control inputs. When I first learned to tumble a full size Extra I tried to "jam in" the foreward stick and rudder... all I got in return was a very violent outside snap and about -6 on the G-meter. The other way to enter, which is much more pleasing to watch, is to pull to a 45-60 degree upline and start rolling to the left... after a couple rotations start feeding in left rudder and foreward stick slowly and begin to take out the left aileron... if it catches you'll get a fast roll that turns into a shoulder roll and then finally lets go and tumbles end over end.

My RC chipmunk does a pretty good tumble if I pull up and put the sticks into the top left corners... but with a small engine and wood prop it doesn't create enough gyroscopics to get a true tumble like full size planes can.

Ty

thank you for your very interesting input. I think the full size aircrafts use gyroscopic effects
a lot. This type of tumble you have just described me a lot of people would mistakenly call
Lomcovak. I'm not really sure if I'm correct but the name "waterfall" they only use in 3D world.
Basicaly the plane is falling down somersaulting forward. In your description the plane tumbles
shoulder to shoulder and at the end it might end up going over the nose (if you get lucky)
In waterfall it seems to be controlled flipping over the nose over and over.
I might be wrong but that's just what I've observed.

Your quite right vilo, In the 3d world a waterfall is a descending flip nose over while the maneuver acropilot just described would be a lomchevak.
To do a waterfall you need to have your plane setup for 3d with rates which would give you 40-45 degrees of throw on your tail surfaces and a descent powerplant that can spin a big prop(plenty of propwash). What the plane will actually be doing is a hovering flip. You would enter the maneuver by pulling vertical with about half throttle and going into 3d rates. Once you see the plane almost come to a stop (as with a stall turn) you would give full throttle and full down elevator. The plane wil flip nose over rotating around the centerline of the wing. the trick then is to keep that centerline horizontaly straight while the plane is flipping and falling, not as easy as it sounds .
Some people use full power the whole time while others prefer to back off power when the nose goes over about 45 degrees. Whatever works i say...

Cool SAL98,that's exactly what I had in mind . Now I understand how it is done.
Tell me... if you fly 3D stuff do you switch your transmitter to 3D rates just before the
manevoure or you simply have it on all the time. I'm new to this so I'm trying to pick up
some hints. I have a Hangar 9 CAP 232 (73") with OS 1.60fx and 18x6 prop. Haven't
flown it yet but will be ready soon. I'm not planning to do anything wild for the start but
will do soon as I become more familiar with the plane. cheers

Just an insight but to do better waterfalls this is what i suggest. set-up ur engine so that response is tight and you have instantaneous response. Try low pitch large diameter props!!! its easier to balance a plane hanging on the prop with it!! With the plane flying level pull up to hang the plane on the prop. You can if you wish start your waterfall at this point but I however achieved impressive results by allowing the plane to tail slide a little and "FLOP" (forward for down flip or Up for up flip) as the nose passes 45deg. on that flop quickly add elevator and power!!!!! This method makes it flip faster and eliminates the need for corrections!!!! However ive only tried it on smaller 3d capable planes 30-60 size but i see no reason that it wont work on you large scale aircraft.

Not to but in SAL , but I like to keep mine on 3-D rates during the routine. Just be sure to have a lot of expo
on aile and elev. later daveo

a waterfall is down and more down, and POWER [img]i/expressions/face-icon-small-smile.gif[/img]