Dime Scale...
Here's some more details I found on HPA re: "Dime Scale" size models:
Don't count on the retrieves being short. I once flew my lightest dime scale model outside and it caught a thermal. I ended up wading through a stream up to my neck to retrieve it. If I could have retrieved faster, I might have won the event. Since then, that one has flown only inside. Some of the Guillows designs had very light construction. For the others, if you use the lightest decent wood you can find (like 5 or 6 lbs), it may still be strong enough, especially for the smaller models.
I was curious and tried to find the bit about not scaling on the MMM web site, but I couldn't. IMHO, although I don't think it is in the rules, scaling an old dime scale design is not kosher. Not so sure about fudging around with a Mooney plan to make it dimish, but perhaps MMM have own rules on this.
Dime Scale rules seem a bit squirmy. The latest seem to say plunge canopies are ok. There is something in the bonus points about compound curve canopies made from flat sheet, but that seems contradictory.
Latest FAC dime scale rules are posted here:
http://www.flyingacesclub.comAs of version on web site on Dec. 23, 2012:
VII. DIME SCALE
Dime Scale models come in two flavors: Traditional, and Pseudo. Both compete under the same rules.
Traditional Dimers are built from plans produced during the “golden age” of modeling; Pseudo Dimers are built
from contemporary designs that honor the methods, structural simplicity, and details typical of those early plans.
1.0 BASIC RULES
A. Dime Scale models are to be of simple design and easy construction such as those built from 10 cent kits or
plans representing full scale airplanes built prior to December 31, 1949.
B. Wing span: 16 inches maximum.
C. When a Pseudo plan is created, the plan size is limited to one sheet of 11 X 17 inch paper plus one
8.5 X 11 inch parts page with engineering and details in the spirit of the original era.
D. Props must be one piece wood or molded plastic.
E. Model and plan must be presented to the CD prior to first flight for static pass/fail judging and awarding of
bonus points as described below.
2.0 DESIGN AND CONSTRUCTION
Combining Traditional and Pseudo dimers involves some unique considerations. “Traditional” Dimers must
be built as per plan; however, contemporary construction modifications as listed below are permitted to ease
construction and increase the model's fun factor.
A. General construction:
1. Minimum wood size:
a. Greater than 14” wingspan: 1/16" thick sheet or square sticks.
b. 14" or less wingspan: 1/32" thick sheet and 1/20" square sticks.
c. Stiff paper called for on some plans may be replaced by 1/32" sheet or stringers with tissue.
2. Butt joints on plans, and landing gear struts may be reinforced with wire, sheet balsa or 1/32" ply.
3. No use of foam.
4. No vacuum formed or plunge molded parts EXCEPT canopies; SEE item 3.0-C "Dime Scale Bonus
Points" below.
B. Fuselage:
1. Pseudo Dimers must be engineered with box girder fuselage with formers.
2. The nose on Traditional dimers may be altered to accommodate improved thrust bearings and
removable nose plugs.
3. Rear motor peg may be located anywhere within fuselage or nacelles.
C. Wings and tailfeathers:
1. Wings may be one piece with spars added or moved. One piece stabs and rudders are permitted.
2. Stab and rudder may be reduced or enlarged moderately.
3. No laminated, wet / hot bent square balsa strip or otherwise "formed" curved balsa tips.
4. Wet / hot bent or “formed” bamboo tips are O.K.
5. Sheet wood may be substituted for bamboo tips called for on some traditional dimer plans.
6. No sliced or cracked ribs.
7. No under cambered wings unless shown on original era plan.
D. Dihedral (Traditional and Pseudo):
1. 1" max per side for models with less than 14" W/S.
2. 1.5" max per side for models with 14" to 16" W/S.
E. Coverings:
1. Double covering required unless original era plan specifically states "single covering."
2. Single covering OK if original era kit supplied just one set of wing insignias or markings.
F. Any color and markings on an original era plan may be changed to another era-appropriate combination.
3.0 STATIC JUDGING / BONUS POINTS / SCORING
A. Models will be “judged” solely for fidelity to plan, both in construction and scale detail. If a detail is on the
plan, it must be on the model. “Judging” is strictly pass/fail, in accord with the event rules.
B. Dimers are not to be held to the same standards of scale fidelity or craftsmanship as FAC Scale models. No
scale points are awarded.
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C. Dime Scale Bonus points: cumulative when model meets multiple criteria.
POINTS CRITERIA
0 High-Wing Cabin and Shoulder-Wing Monoplanes
1 Landing Gear Down and Dirty
2 Compound curved / bubble canopy from clear flat sheet material, i.e. P-51D
3 Parasol
5 Mid-Wing (see Appendix A: Determining Mid-Wing Status)
5 Canard or Tandem wing
10 Low-Wing
10 Float Plane
15 Biplane
20 Triplane
20 Multi