PAA-Day

 

PAA-Day - plan thumbnail image

PAA-Day - completed model photo more pics (1)

PAA-Day  
by WA Pollard
from Aeromodeller
December 1953 
44in span
Tags: IC F/F Cabin
all formers complete :)
got article :)


This plan was found online 04/01/2016 at: http://www.rcgroups.com/forums/showpost.php?p=31970356&postcount=2
Outerzone planID: oz7370 | Filesize: 486KB | Format: • PDFbitmap | Credit*: Sundancer, hogal

   

About this Plan

PAA-Day - Free flight PAA competition model.

Quote: - "Winner of the PAA load design contest ...AT FIRST glance, this model appears to be quite a conventional little cabin machine, of pleasing lines and general neat appearance. However, since every member of the panel of judges quite separately awarded this design top marks out of the considerable number of first-class designs submitted, there is obviously more to it than meets the eye. Examination of the drawing indicates that a tremendous amount of thought has gone into the model. The designer's first aim was good appearance consistent with an aerodynamic layout using a long moment arm and a fairly powerful tail. To employ the Bee engine, this meant a short nose, and numerous small sketches suggested that an inverted motor could be placed well back and hidden, bringing the CG to the desired well-aft position and still allowing a good slope on the windshield. Inversion also meant that the thrust line could be reasonably high and the undercarriage shortened, with a consequent reduction in weight and drag. The dummy is placed on the CG to avoid alteration of trim. Shallow curves soften the lines of the fuse- lage, and the straight dihedral and twin fins are designed to contribute to the aesthetic appeal of the machine. Constant chord was used for reasons of time and simplicity. A total area of roughly 350 sq in was felt to be desirable, based on previous performance factors obtained with models of similar weight and power. This is broken into a 260 sq in wing and 90 sq in tail, which are given fairly high incidence angles on the assumption that models glide at a high angle of attack..."

Update 07/11/2017: Replaced this plan with a clearer copy, thanks to hogal.

Note this plan is a 2-colour 500dpi bitmap PDF, reduced down from hogal's vector tracing. For the original hogal tracing (probably shows more detail) see supplementary file.

Supplementary files

Article.
Previous scan version (patterned background).
PDFvector plan tracing (hogal).

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Notes

* Credit field

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Scaling

This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.

 

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