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Comet - Phantom Flash R.O.G.
Comet - Phantom Flash R.O.G.

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Comet - Phantom Flash R.O.G.
Description: The Phantom Flash R.O.G. (Rise Off Ground) is a classic sport model from the late 1930s. This pdf file is from a high resolution scan (600 dpi) of an accurate copy of an original kit plan (Comet Models kit number A1).
Keywords: Free Flight, Sport, Rubber, Comet
Date: 08.21.2019 18:33
Hits: 502
Downloads: 169
Rating: 0.00 (0 Vote(s))
File size: 419.1 KB
Added by: higgphanx1

Comment:
higgphanx1
Member

Join Date: 12.22.2013
Comments: 12
High Resolution Scan
This high-resolution scan (600 dpi) is of an original Phantom Flash plan from an original Comet Models Phantom Flash kit. The paper on which the original plan was printed on measures 11” by 17”, which is a standard “B” sized drawing form. The original plan has pin holes and fold lines as well as a light yellow/brown patina from decades of aging. I ironed out the fold lines and then I made a 100% Xerox copy of the original plan to eliminate the yellow/brown patina and to repair any tiny areas damaged by some original glue marks left over from whomever originally built the kit.
I measured the wingspan on the original yellowed plan, and it had just slightly under a 16-inch flat wingspan (15.95” flat span to be exact). The left-hand wing panel measured 7.95 inches and the right-hand wing panel measured exactly 8 inches. My cleaned-up Xerox copy, which this high-resolution scan was made from, measures 7.97” for the L/H wing panel and 8.03” for the R/H wing panel for a total of exactly 16” for the flat wingspan. Talk about serendipity, I couldn’t ask for a better result!
08.23.2019 11:30 Offline higgphanx1
higgphanx1
Member

Join Date: 12.22.2013
Comments: 12
16" wingspan is flat span.
In the title block, the plan states that the wingspan is 16”, which would normally be the projected span of the wing. Therefore, given the dihedral angle, the flat span would need to be 16.25” for the projected wingspan to be exactly 16 inches. I don’t believe this is the case. Not having computers nor pocket calculators back in the 1930s, the drafter would have had to either draw a preliminary sketch to determine the projected wingspan or he could have used CRC trigonometry tables to calculate the projected wingspan. I don’t think he would have gone to that much trouble or have spent time doing this. Since I have an original plan that shows the flat wingspan at 15.95” (not the stated 16” span, presumably due to a drafting error or a printing error), I believe that the 16” wingspan as stated in the title block is the flat wingspan before establishing dihedral.
08.23.2019 11:33 Offline higgphanx1
HGF
Member

Join Date: 10.01.2011
Comments: 5
Print wood
Any chance you were also able to scan the print wood? This is the nicest copy of the Phantom Flash plan I've ever seen. Good job!
HGF
08.28.2019 21:06 Offline HGF



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