Horizontal lines
 

Hi fellow IMAC flyers:
When looking at the sequence for basic I'm seeing three imaginary horizontal lines.
The center horizontal would be established when entering the routine and doing the full roll..
The second imaginary horizontal line would be established on vertical maneuvers such as the top of the dumpty bump or sharks tooth.
The third line being the exit lines from the humpty bump or hammerhead.
Am I seeing this correctly?

Tom

Generally speaking, there is an actual horizontal line between all maneuvers. You are judged on maintaining your horizontal line parallel to the flight line during the entire sequence.

Every figure starts and ends with straight and level flight. In Basic that will always be parallel to the flight line. In higher classes it may be perpendicular to the flight line. These lines are not always at the same altitude above the ground for different figures.

I don't understand what you mean by the "horizontal lines at the top of the dumpty bump and shark's tooth". BTW, it is called a HUMPTY Bump :D

Ok, so when a maneuver is completed there is no definitive altitude when exiting such maneuver as long as it is parallel to the ground?
Each maneuver is entered and exited from level flight. Got it.

Thanks

Correct. Some figures like a loop require the same entry and exit altitude, others like a hammerhead do not. And the top of each figure is not all required to be the same from figure to figure.

If you are serious about flying IMAC I strongly suggest that you download the rule book and take a look at the actual rules.

https://www.modelaircraft.org/files/...Aerobatics.pdf

You can also take a look on this explanation of the BASIC sequence.
http://www.mini-iac.org/portals/0/do...eb41ad12f9.pdf