Span 61 cm / 24 in
Weight 47 g / 1.7 oz
The concept:
■ Double-X-Wing configuration
■ Easy to build
■ Few parts
■ Upper wing pairs larger than lower pairs
■ Lower wing pairs stiff balsa, upper pairs lighter material
■ Basis for YOUR own experiments
Other Eightwinger/Double X’er designs at beginner.zone’s have been so far:
■ 1026 Double X’er glider (X-wing)
■ 1068 Double X’er glider II (X-wing)
■ 2009 Eightwinger Double-Xer (rubber powered)
■ 3026 Eightwinger Double-Xer RPU
Building the sheet balsa Double X’er Glider Experimental:
Materials:
Fuselage: B 3; upper wings: soft B 1.5; lower wings: stiff B 1.5; anti-warp strips: B 1; linen/cotton band width ½ in = 12 mm; ballast: piece of steel or lead.
Assembly:
Cut out balsa parts according to plan. Remember – there are four front wing halves and four rear wing halves! Sand meticulously. Make coloring now, if wished (photo).
Fuselage.
Make four wing slots into fuselage part as shown on plan.
Wings.
Reinforce leading edges of lower wing pairs with cotton/linen. Join the four front wing halves one half to the other according to plan thereby paying attention to given dihedral. Repeat the same procedure for four rear wing halves. Remember short wing pairs are the lower wing pairs and larger wing pairs are upper. Visual check to obtain best possible symmetry. Use linen/cotton band for reinforcing wing half joints on top and bottom. Let dry.
Final assembly.
Put fuselage on a so called ‘third hand’. Glue wing pairs into fuselage slots. Double check here as well symmetry. Let dry.
Install the eight anti-warp balsa strips one at each wing tip. See plan. Let dry.
Balance at given CG. Test fly your model over tall grass.
Have fun with your Double X’er Glider Experimental which is an able slope soarer. For trimming warp left or right upper rear wings up or down a little.
When storing your Eightwinger don’t have it sit on its wings, as these thin balsa parts tend to bend when loaded with weight; instead put model on its rear end standing upright or hang it at its CG from your hobby-room ceiling.
Tenha um bom vôo! (dumogi penerbangan becik!)
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