Javelan (oz1981)


Javelan - plan thumbnail image

About this Plan

Javelan. Free flight delta power model. For .5 to .8 cc diesels. March 1955, Aeromodeller.

Quote: "New Delta by 'Vultan' designer Laurie Ellis, is especially for the .5 to .8 cc diesels.

THE JAVELAN is the fourteenth of a series of Delta design by S/Ldr. Laurie Ellis of Vultan (oz1847) fame. In each design various ideas have been tried to ascertain the characteristics of the delta wing in model sizes. The better features of each design have been built into the Javelan and the results have paid off. Perhaps those deltas should not be called 'designs' instead they should be termed 'projects'. Not being a theoretical or mathematical bod, Laurie tackled these projects from a purely practical angle, it is surprising what one can learn by the trial and error method.

Laurie does not recommend more power than the Mills .75 or Allbon Merlin for the Javelan. Experimenters could try a Spitfire but they might encounter trimming difficulties. Experience has shown that a delta does not need a great deal of power to fly it and any power in excess of that required, brings trouble.

If the Javelan is built the way it is shown on the plan, one will have a robust model which will give hours of fun and fly in conditions bad enough to ground the conventional.

Wing. Pin leading edge and trailing edge on plan. Position the centre cap strip, but do not cement along the centre line as dihedral break forms here. Fix all 1/16 x 1/4 in lower cap strips. Now add 1/8 sq lower spar. Fit rib W.1 in position and cement along the right side. This rib is to be placed directly over the crack formed by centre cap strips. Work on the right side of the wing only, add strip at TE..."

Update 09/10/2018: Replaced this plan with a clearer copy (patterned background removed) thanks to DBHL, theshadow.

Scan from DBHL, cleanup by theshadow.

ref DBHL-7983.

Direct submission to Outerzone.

Update 09/10/2018: Added article, thanks to Algy2.

Supplementary file notes

Previous scan version.


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