I see people are building a lot, these days, with no offence meant, in my pilgrimage the fields i have been, i have seen people fly for fun (nothing wrong with that) however what i haven't seen is people flying with a Plan in mind. Prolly because of lack of info on the subject.

IMAC (international Aerobatic Aerobatic Club) Style of Flying is a direct of lift off from the real kind of aerobatic flying using Aresti system

This kinda aerobatic is much more graceful to watch (compared to a high energy 3D flying) and difficult to execute, as it involves s great degree of precision flying

I shall post some video repository and tips and tricks to achieve good precision and may be add some videos flown by me I'll also post some official links and events, their videos

House is open for questions, suggestions, tips, your experience etc

Armed with this expose, i will urge all of you to (a) Plan your flight (b) and Fly your plan. Lets pick up this kind of flying in India and may be one day hold a national level IMAC competition

First and foremost is to learn the Aresti System of denotion. this is the first video that explain Aresti beautifully

With the Similar Line Symbology overlay here is the real flight. correlate how manoeuvre symbology appears in real life. The guy who has flown it flawlessly is Peter Schmidt

Harv Dhiman (22 yrs old now) when he was 17 yr old Flew this difficult sequence in IMAC contest. Motivating to say the least

Alright Brass tacks now. First and foremost. Keep the following Four golden rules in mind

1. Start the manoeuvre with wings level and end with wings level (Could be inverted). Keeping wings level and staying on the baseline could be very difficult. more difficult than some difficult 3D mano. WINGS LEVEL ! WINGS LEVEL !! keep saying this.

2. Use metronome or call out "One Thousand .. Two Thousand" and perform the manoeuvre to timing

3. Use subtle rudder to stay on the Baseline and maintain direction

4. Best place to change direction is on the vertical (up or down) using ailerons (this tip I consider one of the most important tip which most pilot are reluctant to share, however in Fighter flying we do this all the time, especially on the downline, we call it the aileron turn)

1. Visit http://www.mini-iac.com/. It has plethora of info, sequence judging principles etc. TRIVIA Did you know some of the judges don't fly at all, but are very good at judging !! funny

2. Most pilots memorize their maneuvers and flight sequence. There is a pitfall to this, in the excitement of performance or if one mano goes bad (Happens all the time) you WILL loose track of the sequence, having a "caller" by your side can help keep you relaxed, focused and will be invaluable when your mind goes blank for a second or two.

4. Write out your IMAC sequence EXACTLY as you want your caller to read it out. he prefreably should be a RC pilot and if he is as good or better than you nothing like it

5. I DO THIS ALL THE TIME. Get a stick model plane and visualise my manoeuvres a thousand times before i actually fly them.

Some basic components of Aerobatics and Good Judgind principles are explained here in this video

Visit

http://www.mini-iac.com/Default.aspx for more on IMAC

Visit Aresti website (Used copiously by real life aerobatics guys)

http://arestisystem.com/

Lots of IMAC call sheets for you to start is found here, i shall recommend a few, starting from basic to sports to intermediate to advanced

http://www.jtecrc.com/imacsequences.html

You get stick plane such as the one attached from hobbyking (in fact you can make it one yourself) and practice your mano, we call it chair flying (Hardly a chair though, you are all the time pacing the room, since we called it that the name stuck)

Here is the link for Hobby King stick plane

This is another good video where pilot uses stick plane to explain and used a card (Could be clipped onto the tx and flies with/without the caller). card is there for ref only (fallback option) you should've memorised what you have to fly and practices them on the simulator

Major studying to do! Gusty sir, nothing simpler? 

That's awesome  lot of information Gusty sir..... Sir where do u fly ur models as me too from Hyderabad.. I wana meet u and learn a lot more abt flying....
Thank you 😊

Thanks for Sharing Gusty Sir..!!

Thank you. Very informative...

Its very interesting and good way to learn.

Thanks Gusty sir

subscribed 

Quote from: sanjayrai55 on June 30, 2015, 06:03:37 PM
Major studying to do! Gusty sir, nothing simpler?  

That's true Sanjay sir, Simulator is a good place to start, believe you me, straight run after entering box itself is a big thing to do, even known pilots sometimes get disqualified for violating the Deadline.

If there are enough takers, i don't mind conducting free IMAC like flying camp and have competitions. we could call it anything InMAC or something, doesn't matter. basically flying Aresti sequences

Quote from: liakhat on June 30, 2015, 06:25:24 PM
That's awesome  lot of information Gusty sir..... Sir where do u fly ur models as me too from Hyderabad.. I wana meet u and learn a lot more abt flying....
Thank you

No issues, Liakhat bhai, drop me a PM, these days i am travelling a lot. Post monsoons may be

PS
You are welcome for all those thanks !

These Four sequences are for 2015 IMAC competition, good place to start, Give it a go guys, remember

Plan your Flight  &  Fly you Plan

I would love to see IMAC or F3A flying events n competitions being conducted as per the FAI norms but over the years there has not been any such event in India except fun flying meets n events. We need to get all the like minded people & organize such a aerobatic event for all classes from basic to unlimited.

Cracks me up

If I may make an addition to this thread, I found a very detailed article on snap rolls:
http://www.flyrc.com/flying-the-snap-roll/

What is F3A?

The F3A acronym stands for:

F = Flying model
3 = Radio control
A = Aerobatics

The FAI class of F3A involves complex aerial maneuvers with a radio controlled model aircraft, where utmost precision and skill in controlling the model aircraft in any attitude and under all conditions is required. The model aircraft is 100% influenced by the wind and all maneuvers in the aerobatic schedules are judged relative to a point on the ground. The competitor must therefore compensate constantly for possible wind drift and other weather elements.

Typically, an F3A model aircraft will have a fuselage length and a wing span of 2 meters (78.74") or less, and the weight must not exceed 5kg's (11.02lbs). They can be made out of any material, built-up or composite, as long as it meets these 3 elements.

The motive for power is either an internal combustion engine, with no size or fuel limitations, but the engine has to be adequately silenced, or an electric motor powered by a battery not exceeding 42 volts. There is a 94 decibel limit for all aircraft regardless of power unit.

The F3A class is a team and an individual competition. FAI member countries may enter a team of up to 3 competitors as a national team for world and continental championships. Team results are the sum of the three competitors' scores at the end of the contest.

Flights are performed directly in front of the judges in an aerobatic zone or "box", which extends 60 degrees to the left and right of a center line, and at an elevation of no more than 60 degrees. Each time the model aircraft crosses the center line, a particular maneuver of an aerobatic schedule has to be performed, involving components such as loops, rolls, lines, spins, snap rolls, stall turns, knife-edge, and combinations of these. At the ends of the aerobatic box, the model aircraft is required to do turn-around maneuvers to enable it to reverse its direction of travel. An aerobatic schedule has 17 maneuvers, excluding the take-off and landing. Maneuvers, or parts of them, performed outside of the box are penalized by loss of points, proportional to the degree of infraction. Generally the model aircraft is required to be flown at 150 meters from the pilot, in a plane perpendicular to the center line.

Each competitor will be entitled to 4 preliminary flights, of which the best 3 scores will determine his/her placing. Semi-final and final rounds are generally only flown for world, continental and national championships, of which the finals also involve 2 different unknown maneuver schedules along with 2 finals schedules.

The competitor's performance is assessed by a panel of judges who will award marks, independently from each other, between 0 and 10 for each maneuver, or figure. Maneuvers are assigned a difficulty factor (K-factor, which is a multiplier of each maneuver) depending on the complexity of the particular maneuver. Judging is based on four basic criteria: precision (or geometry), smoothness and gracefulness, positioning (display), and size of maneuvers. Points are subtracted for various types of defects observed by the judges, the severity of these defects, and the number of times these defects are observed.

For those wishing to start practicing, here is the Sportsman Schedule for the 2015 F3A Competition:

Terminology:
(U) - Upwind
(D) - Downwind
(T) - Turnaround

Sportsman Sequence
Maneuver                                                   KF

1. Takeoff Sequence (U)                               1

ENTER BOX

2. Straight Flight Out (U)                              1
3. Half Reverse Cuban Eight (T)                     2
4. Straight Flight Back (D)                            1
5. Stall Turn without Rolls (T)                        2
6. Double Immelmann without Rolls (U)          2

EXIT BOX (upwind-free turnaround)

ENTER BOX (going downwind)

7. One Horizontal Roll (D)                             1
8. Half Reverse Cuban Eight (T)                     2
9. Cobra without Rolls (U)                             1
10. Immelmann Turn (T)                               2
11. 45 Degree Downline (D)                          1

EXIT BOX (downwind-free turnaround)

ENTER BOX (going upwind)

12. 45 Degree Upline (U)                               1
13. Split "S" (T)                                            2
14. Two Point Roll (D)                                   2
15. Half Cuban Eight (T)                                2
16. Two Inside Loops (U)                               2

EXIT BOX

17. Landing Sequence (U)                              1



Following is the Aresti representation of this schedule:

Video of the 2013/14 Sportsman Sequence: