8.1.2. Class I and Class II
8.1.2.1.
Class I and Class II models shall receive 100 bonus points
if the linear dimensions of the major components of the
model are to the same scale, within a plus or minus five (5)
percent tolerance. Models which appear to comply with this
tolerance upon rudimentary inspection need not be further
checked except in case of dispute. “Major components’’ of
Class I and Class II models are considered to be the
fuselage (excluding surface markings) engine nacelles, air
brakes, the side-view profiles of the vertical stabilizer and
rudder, and the top-view profiles of the wing and horizontal
tail surfaces, and all movable surfaces which are attached to
or form a part of these surfaces (flaps, ailerons, elevators,
etc.). Although complex motions of moveable surfaces
need not be duplicated (such as Fowler flaps), the general
direction of movement must be the same as on the fullscale aircraft being modeled. Unless proven otherwise,
ailerons shall be assumed to move simultaneously in
opposite directions. Although landing gears need not to be
scale, it must emerge from the model in the same location
as the prototype.
Questions:
Is the +/- 5% taken from the actual aircraft dimensions? For example, if a true aircraft had 53' wingspan x +/- 5% = 55.65' to 50.35' or 667.8" to 604.20".
If the model is built to 18/1 scale, the wingspan could range from 37.1" to 33.57"...same method for Fuselage length, stabilizer, rudder, ect. What about fuselage width, does it also have to be +/-5%?
Seems a lot of aircraft don't have fuselage width detailed in scale drawings. Making sure I understand the +/-5% Scale rule.
Topic: +/- 5% Scale Rule for Class I & II (Read 606 times)