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Sky9pilot
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Re: The various divisions of Free Flight models
Reply #15 - May 7th, 2020 at 9:11pm
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Bostonian Model Rules
Here's a PDF of the AMA Bostonian rules for indoor Free Flight (always capitalized) model airplanes.

Here's the first five rules on the list:

1)Maximum projected wingspan shall not exceed
16 inches (40.64 centimetres).
2) Maximum wing chord (measured parallel to he
direction of flight) shall not exceed three (3) inches (7.62 centimetres).
3) The diameter of the propeller(s) shall not exceed six (6) inches (15.24 centimetres).
4) The length of the model excluding the propeller(s), but including the thrust bearing(s),
shall not exceed 14 inches (35.56 centimetres).
This measurement will be made in the direction of flight and, will include surfaces, which extend beyond the thrust bearing or fuselage end because of a sweep or unusual mounting.
5) The fuselage structure must include a box, which has minimum dimensions of 1.5 inches x 2.5 inches x 3.0 inches (3.81 centimetres x 6.35 centimetres x 7.62 centimetres). The width (the horizontal dimension perpendicular to the line of flight) of the fuselage shall not exceed three inches (7.62 centimetres). The box must be enclosed within the fuselage structure and must be covered so as to restrict free air movement through the box. Normal sag of the framework between supports caused by the tension of the covering will not be considered as a violation of this rule.
  

Bostonian-General-Rules.pdf ( 50 KB | 6 Downloads )

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And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Sky9pilot
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Re: The various divisions of Free Flight models
Reply #14 - Aug 30th, 2019 at 6:19pm
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Manhattan Cabin indoor model airplane class.  I was reading today about this class of model Free Flight airplanes/contests and didn't know what it referred to.  I found this excerpt from Google Books - Building & Flying Indoor Model Airplanes... I've included the excerpts in PDF and here's the link to the full book: Click Here
  

manhattan_cabin.pdf ( 409 KB | 9 Downloads )

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Sky9pilot
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Re: The various divisions of Free Flight models
Reply #13 - Aug 20th, 2019 at 8:54pm
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Found this on the net regarding some books published on model airplanes: Published in the U.S. by Anderson Publications, 1998. Volume 1 (1907-1935)Dawn of American Aeormodeling, Volume 2(1935-1941)The Boom Years, Volume 3((1941-1949)War and Evolution and Volume 4(1949-1965) Transition.)I think it's probably a pretty good ballpark range of Golden Age Model Aircraft.
Tom
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Re: The various divisions of Free Flight models
Reply #12 - Aug 20th, 2019 at 6:35am
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Very much enjoy reading about these divisions of modelling but am a bit confused about the "Golden Age of Modelling". Is there any definitive or near definitive definition of Golden Age?
Mike
  

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Sky9pilot
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Re: The various divisions of Free Flight models
Reply #11 - Aug 19th, 2019 at 5:49pm
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Stagger wing is a great looking aircraft.  I look forward to following your build in the current builds board.
  

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Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Stuart
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Re: The various divisions of Free Flight models
Reply #10 - Aug 19th, 2019 at 1:59pm
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Thanks Tom

After thinking about it for a while that’s what I came up with.  I just couldn’t imagine 2 layers of covering.  I think my next project will be that Beechcraft Staggerwing I started years ago.  It was for a cookup on SFA.  Got the whole fuselage finished.  Went to work for a week and came home to a pile of match sticks.  The cats decided it would be fun to chew it up.  They’re lucky to still be alive.  I now have a pet free workshop to play in.

Stuart
  
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Re: The various divisions of Free Flight models
Reply #9 - Aug 19th, 2019 at 11:45am
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Stuart wrote on Aug 19th, 2019 at 10:13am:
“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.”   
What is double covering? 
Thanks
Stuart

Double covering I believe is referring to covering both the top and bottom of the wings and stabs unless noted otherwise on the plan.   Some models like NoCals just have one surface covered like the tops of the wings with no covering on the bottom of the wings.  Some indoor models are similar.  But the referrence you've noted is the Dime Scale rules which are models that have very simple construction but represent real aircraft.  Unless the real aircraft was covered only on the upper surfaces...then both surfaces require covering.  In regards to markings (national insignias, numbers etc.) If the plans only gave enough markings for the topside then that would be all that was required for competitions.  Remember these rules are for those who want to compete in "Flying Aces Club...'FAC'" competitions.
  

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Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Stuart
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Re: The various divisions of Free Flight models
Reply #8 - Aug 19th, 2019 at 10:13am
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“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.”

What is double covering?

Thanks

Stuart
  
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Re: The various divisions of Free Flight models
Reply #7 - Feb 19th, 2019 at 7:21pm
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I meet up with Rich Weber and other fellow free flight models on Saturday morning for build sections. Great guy.
Paul
  
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Re: The various divisions of Free Flight models
Reply #6 - Feb 6th, 2019 at 11:49am
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The latest issue of the FAC Newsletter has more clarification on Dime Scale/Pseudo Dime Scale plans...I'll try to scan and post the updates.

Tom
  

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Re: The various divisions of Free Flight models
Reply #5 - Feb 1st, 2019 at 11:14am
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Check out our sister site Free Flight Archive's Plan Gallery: Click Here
Tom
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Re: The various divisions of Free Flight models
Reply #4 - Feb 1st, 2019 at 9:29am
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Great info for us newbies !   Would be nice if there was a decent book similar to the late Don Ross's Rubber Powered Model Airplanes but with detailed additional information on the various divisions.   A book with lots of photographs would be even better.     Alternately, an e book would be a cheaper proposition and could be a collaborative effort.
  
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Re: The various divisions of Free Flight models
Reply #3 - Sep 22nd, 2018 at 7:32am
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Thanks much for adding a forum section for a model type that many of us find attractive. This is an excellent summation of the necessary info that we need to begin dimer projects.

Nice job!!
  
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Re: The various divisions of Free Flight models
Reply #2 - Aug 30th, 2014 at 9:30am
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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.com
As 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.
14
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
« Last Edit: Nov 11th, 2017 at 5:00pm by Sky9pilot »  

Dimers_facnwltr_1_julaug_001.jpg (Attachment deleted)
( 285 KB | 8 Downloads )
dimers_facnwltr_2_001.jpg

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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C.L. Chennault
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Re: The various divisions of Free Flight models
Reply #1 - Mar 24th, 2012 at 2:01pm
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Tom, thank you very much for posting that. I have never seen all the info in one place like that.   

Thanks!
Eric
  

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