Que es IMAA Y IMAC ????

[roller1boy]

Cual Es La Diferencia Entre Estas Dos Clases

[JayBarcelo]

Purpose

The International Miniature Aircraft Association, Inc. (IMAA) is formed for the purpose of fostering and advancing the operation of large scale radio controlled model aircraft in a setting where informality and safety of operations prevail. Additionally, it is formed to create an atmosphere where pleasure, recreation, fellowship, and co-mingling can be fostered and found to exist amongst individuals enjoying the sport of building and flying large scale radio controlled model aircraft.

Who are We?

Although IMAA is a standalone association, we are also the Academy of Model Aeronautics' (AMA) largest special interest group *. AMA is the world's largest sport aviation organization, representing a membership of almost 155,000 from every walk of life, income level and age group. AMA is a self-supporting, non-profit organization whose purpose is to promote development of model aviation as a recognized sport and worthwhile recreation activity.

* Note: The IMAA was made a SIG (Special Interest Group) of the AMA in October, 1983.

What is Large or Giant Scale?

The concept of large or giant scale is generally considered to apply to radio controlled model aircraft with minimum wingspans of eighty (80) inches for monoplanes and sixty (60) inches for multi-wing aircraft. Ducted Fan aircraft with one hundred forty (140) inches combined length and width, measured from wing tip to wing tip at the widest point perpendicular to the fuselage and added to the length of the fuselage, excluding any protrusions. Quarter (1/4) scale replica's or larger with proper documentation (minimum 3 view drawing of an actual person carrying aircraft) which do not fit the size requirements will be permitted. However, the concept does not encompass radio controlled model aircraft so large as to have the potential of carrying a human being.

[JayBarcelo]

IMAC (International Miniature Aerobátic Club) is the organization that grew out of the interest of flying scale aerobatics. The group was founded in 1974 with 97 charter members. Their intent was to emulate the IAC, which was dominated by biplanes at the time, so the IMAC initially called themselves the National Sport Biplane Association. In 1976 the National Sport Biplane Association became affiliated with the IAC and became IMAC.

In the next few years, membership in IMAC grew, and more model aircraft manufacturers began producing scale acrobatic aircraft. The Pitts still was popular, but monoplanes like Leo’s Laser and CAP 21s were also being built. At this time (early to mid-80s), most of the scale aerobatic models used in competition were 1/4 scale or less, meaning they had wingspans between 60 and 80 inches and engines ranging from 0.60 to 2.0 cubic inches running on model airplane fuel (glow fuel).

Rich Rottenberk and his 33 percent Ohio RC Extra 300L.In the late 80s and early 90s, new high-performance mono-planes began to appear on the IAC flight line and also at IMAC contests. Extras, Sukhois, and CAPs became the hot ride of choice. Here is one major advantage of flying models over their full-scale counterparts—the price difference between a clipped-wing Cub and an Extra is a nonissue!

During the 90s every kit manufacturer was producing these hot rods in sizes from 1/6 scale to 35 percent scale (54- to 105-inch wingspans), with the larger aircraft powered by gas engines in the 2.4-to 6.0-cubic-inch range. These scale acrobatic aircraft were very popular with all modelers. This trend was helpful to IMAC. Formerly, the soley recognized form of model aerobatic competition involved "pattern" aircraft that appeared dissimilar to their full-size cousins- narrow, ultra streamlined, and unnaturally long moments.

For IMAC, the only aircraft requirement for classes above Basic is that it is a faithful scale model of a known aerobatic aircraft. With all the Extras, CAPs, and Sukhois out on the market, many fliers already had what was needed to be competitive, so IMAC membership grew steadily. From the late 90s to the present, growth was not only in membership, but also in the size of the airplanes themselves. It’s not a shock to see models 40 to 46 percent scale on the IMAC flight line. These large scale models are powered by twin-cylinder gas engines that are 9.0 cubic inches (150 cc) and produce close to 20 hp!

You might ask why so big and will they get bigger? For the first question, size does count. Big tends to fly and present better than small. But size alone does not make you a winner. Many contests still are won, even in the upper classes, by smaller aircraft flown by highly skilled pilots. For the second question, I would say we have reached the max size. Our sanctioning body, the Academy Model Aeronautics (AMA), limits takeoff weight to 55 pounds. Typically, 40 percent aircraft weigh 35 to 40 pounds, and this combination of power, weight, and size perform the best.

[prann]

Cual Es La Diferencia Entre Estas Dos Clases

IMAA - International Miniature Aircraft Assoc. Aviones grandes, monoplanos de mas de 80', biplanos de mas de 60', jets de mas de 140' suma de fuselaje y alas o aviones de 1/4 escala o mayor. basicamente un "Special Interest Group" de la AMA de aviones grandes que no tienen que ser escala.

IMAC- International Miniature Aerobatic Club - Un "Special Interest Group" de la AMA interesados en aviones que repliquen las acrobacias de los aviones grandes.

Esto es el "Cliff Note" de lo que escribio Jay.

[roller1boy]

Gracias Muchachos Y Jay Por La Aclaracion Despues Les Preg. Mas Cositas :d