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Speed,Combat,Scale,Racing => Scale Models => Topic started by: Clancy Arnold on November 22, 2010, 02:21:50 PM
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I just got the word. IMAA says a monoplane model over 80 inch Wing span or a biplane over 60 inch wing span qualify as Giant Scale.
That makes Dick Byron's B-24, John Witt's Jenny and my Jeannin Stahltaube all Giant Scale.
Anyone else have a model that qualifies? Sorry G-Man, your SDR is not a Scale Model. LOL
Clancy
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Does an 80" Eindecker qualify? Almost I guess because right now it is waiting a major rebuild. LL~
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The other qualifier is true 1/4 scale or larger. So yes, the Eindecker will qualify if at least 1/4 scale of the original, regardless of the model's wing span. A good example is the Shoestring. Quarter scale model only has a wingspan around 60 inches, but it's giant scale legal.
Paul
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By the way - what does giant scale have to do with Control Line Scale? I thought Giant scale was an RC term.
??? ??? ???
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John
Short answer. Nothing!
Long answer. Not much but it is interesting that some CL Scale models are big enough to qualify. I assumed that they had to be much larger than the stated requirements. I had heard the 1/4 scale requirement but thought it was a mandatory requirement until I read a post on an RC Forum that his model that is smaller than mine, of the same plane I just built, was Giant Scale.
The idea of converting a RC Giant Scale kit model to Control Line opens up more planes to consider for your next build. The larger model is also easier to detail.
Clancy
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For some reason I have stuck with bigger scale models. All were converted RC models. The biggest problem that I have is the larger airplanes need more room to fly right. My first shot at the Nationals was a converted RC Extra 300S with an OS max 55. It simply would not land smoothly. I converted it back to an RC and it lands great! As an RC it has a 100 yards to set up a glide and the wind is not changing directions. My current project is a Brodak La-5 profile. Bet it flies great and lands great. It will be light and is designed for Control line. Also remember we have a 20 lb and 1.25 CI limit. Oddly enough their isn't a limit on electric size. Bet that rule was written before the current crop of electrics came on the market. Hobby King has a 6000 W electric equivlent to a 50 CC gas burner.
Anyway big is fun but too big doesn't fit the circle and fly well. Especially on a windy day.
H^^
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John
You point out something that most modelers would not think of, Landing in a continuously changing wind direction.
I think the "fix" is to move the CG forward on CL models. I moved the CG forward on the Taube 1 1/2 inches from 33% of root cord to 20% of root cord. Now we have to wait for decent weather to test fly in to see if that was the correct adjustment.
The change required a 6 oz block of lead under the front of the OS FS91 engine. That brought the total weight to 9 1/4 lbs or 14.22 oz per sq ft wing loading.
Still should be a floater.
Clancy
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1/4 Scale is a group of scale RC people/group/organization. Giant Scale is another group. Two distinct groups. I remember a distinguished RC Scale modeler that was asked to speed at a 1/4 Scale Banquet. He brought his newest plane that the name eludes me now. It was a biplane with only a 48 inch wingspan and was enclosed single seat design. H^^
Thanks to a fellow modeler, I need to proof read a little better. It is either the keyboard, my fingers or the brain that keeps messing up. I meant to say "speak" at the banquet. Hope you all will forgive me. Just think if I started getting senile. HB~>