ok i need some answers! :D

[Bsmooth]

What are the following Aerobatic maneuvres?

1. Lomcevak? (did i spell it right?)

2.Figure 9?

Also What is the difference between a Humpty Bump and a Shark's Tooth?

I'd like to work on the IMAC Basic Sequence. Any tips?
As always, any helpful suggestions and answers are greatly appreciated. Thanks!

-Bsmooth

[wildpalms]

Figure 9 - Go vertical and then do a 3/4 loop. You often have various options on this i.e. part rolls on the way up. The Loop is done in the direction that makes it look like a 9. Try waving your hands in the air and it will make more sense.

The humpty bump is basically an arch. Go vertical perform a half loop and come down vertically, again this usually has various options i.e. push or pull, rolls, part rolls etc.

I've never heard of a Shark's Tooth.

Lomcovak (with an accent on the a)

It is basically three consecutive forward somersaults, the plane of each circle being at 45degrees to the one before it; all this with vertually no forward speed. Quote from my bible (Aerobatics by Neil Williams). There are apparently a number of versions and variations, suffice to say I can't do any of them :)

[wildpalms]

A search on Google (always a good starting point) came up with:

Shark's Tooth; Pull up to 45 degree incline, half roll, pull through to vertical and then pull through to level flight. I found a number of options on this basic manoeuvre as well. It is pretty much a half reverse cuban but you go straight down in the middle rather than going smoothly round.

http://www.charlesriverrc.org/articles/flying/donstackhouse_whatisalomcovak.htm

is a a good link to the Lomcovak

[flyfalcons]

I have found the best way to do a lomcevak is to do the following:
1. Pull 45 degrees up and do a 1/4 roll so the top of the plane faces you.
2. Do a positive snap in the opposite direction that you rolled.
3. After a full snap roll, move the elevator stick from full back to full forward and watch the magic happen.

To do the maneuver well, you will want a short-coupled plane like an Extra or Cap etc. An aft CG and lots of rudder and elevator throw are helpful. Be good at unusual attitude recoveries as the plane can end up in just about any attitude imaginable, up to and including an inverted flat spin. I have a Dave Patrick Extra that performs this maneuver extremely well, but if the maneuver is performed while travelling left to right it almost always ends up in an inverted spin.


Wildpalms basically described a reverse sharks tooth. In this year's basic sequence, pull vertical, at the top pull to a 45 inverted down line and do a 1/2 roll halfway down. Level off to finish the maneuver. Go to www.mini-iac.com for more info.

I always thought the figure 9 started with a 3/4 loop from level and can involve multiple snaps or broken parts on the way down ;) .

[Mike Wizynajtys]

The Sharks Tooth is a 45° up line with a vertical down line. It's usually used in a pattern or IMAC sequence as a turnaround maneuver. Many times you'll see full or partial rolls or snap rolls on the 45° upline and/or the 90° downline. This maneuver can also be flown in reverse with any combination of rolls and inverted flight thrown in for added difficulty.

Go to the IMAC web site. www.mini-iac.com and you'll find a document called the Flying and Judging Guide. In there they describe several families of aerobatic maneuvers.

The Lomcevak is a tumbling maneuver that can be difficult to perform with most planes and completely impossible for some others. The exit of the maneuver is many times unpredictable. For that reason you will not find it listed as a maneuver in the FAI catalog. It usually requires a short coupled plane and a large, heavy prop. The maneuver relies on gyroscopic precession to get the tail to swing up and over the nose. I've never been too good at it myself, but then I never have practiced it much either.

Wiz

[DBCherry]

I always thought the figure 9 started with a 3/4 loop from level and can involve multiple snaps or broken parts on the way down With broken parts being the operative words here.
Bsmooth,
Think about it. Flying straight and level, pull up into 3/4 loop, straight vertical down line. It ends up going straight into the ground. :p A figure 9 is an RC pilot's way of saying he stuffed the plane. ;)
Dennis-

[jbourke]

Originally posted by DBCherry
A figure 9 is an RC pilot's way of saying he stuffed the plane. ;)

Correct.

Jim

[Norm]

Another suggestion that should help you learn these maneuvers is to get a stick plane. A small plane with a stick glued to it so you can fly the maneuvers with your hands. This helps you realize what the maneuvers should look like, and which way to roll, etc.

As someone already suggested, go to the IMAC site and download the judging guide. It explains everything the judges are looking for in each maneuver.

Good luck,
Norm

[Arbo]

flyfalcons, good directions on that move. I just went into my dave browns simulator, picked a cap and did as you said... wow, that's quite a move, but alas it ended in a flat inverted spin and hitting the ground... ;)

Paul