Red Arrow (oz15593)
About this Plan
Red Arrow. Simple rubber sport-scale model.
Note this planfile is derived from the raw scan by ilgk48 on the HPA site (see datafile). This version here has had a minor cleanup and some re-alignment.
Quote: "Celebrate 25 years of the famous display team with Andrew Longhurst's Red Arrow.
AFTER being deafened at an air show rifeaturing the Red Arrows I was the target of much vilification from my two offspring concerning my predilection for ancient rubber models. Much impertinence was aired concerning my ability or otherwise to design them a proper jet model, like the British Aerospace Hawk.
I was caught in a quandary, half-wanting to foster this unusual burst of interest in model planes and half-fearing the effect of hot Jetex exhaust on small tender fingers. Further negotiations ended up with my offering to build a proper jet but with Rubber Band power. Absolutely no problem, I assured them, airily closing my mind to my last, disastrous attempts at flying low-wing rubber models.
When they had gone to bed I quickly enlarged the Hawk three-view drawings helpfully provided in the display programme and made a small profile glider to test the aerodynamics. I quickly discovered, to my chagrin, that the wretched thing had a fatal desire to fly sideways. I chopped the fuselage about to no avail and finally sought assistance from my hero Bill Dean's F86 Sabre (oz8324) plan. By grafting on the highly-swept Sabre wings the missing stability appeared as if by magic.
The next thing was to evolve a really simple wing structure, suitable for youngsters to build, which would avoid the stall sensitivity of the flat plate section. I remembered Martyn Fressnell's article on wings in the September '87 Aeromodeller, and its exhortation to try leading edge droop. Guess what - it really works! In fact, we ended up with a quite sophisticated little wing which is very stable and yet simple enough for my ten-year-old to build with only a modicom of supervision.
Building: Build the flat part of the wing, the tailplane and fin over the plan as usual. Add the leading edge 'droop keepers' to the wing so that the high point exactly coincides with the 2mm sq leading spar. Remove the flying surfaces from the plan and glue the leading edge drover onto the wing, allowing a little overlap at the ends. When dry, carefully sandpaper the two wing roots so that they will joint perfectly at the required dihedral angle. Cement together with a 13cm block under one wingtip..."
Note this article is an extract from post on HPA by ilgk48 of the complete Aeromodeller magazine, see https://www.hippocketaeronautics.com/hpa_plans/details.php?image_id=13303
Supplementary file notes
Article.
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(oz15593)
Red Arrow
by Andrew Longhurst
from Aeromodeller
September 1989
18in span
Scale Rubber F/F LowWing Military
clean :)
all formers complete :)
got article :) -
Found online 26/09/2024 at:
https://www.hippocketaeronautics.com/hpa_plans/details...
Filesize: 365KB
Format: • PDFbitmap
Credit*: ilgk48
Downloads: 224
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- Red Arrow (oz15593)
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Notes
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