Javelin Jr oz9851


Javelin Jr - plan thumbnail image

Javelin Jr - completed model photo

Submitted to Outerzone: 17/02/2018
Outerzone planID: oz9851 | Filesize: 371KB | Format: • PDFbitmap | Credit*: Circlip, RFJ


About this Plan

Javelin Jr ROW. Free flight model for Rise Off Water.

Quote: "The 1/2A-A Jr. was designed to the same formula as the original FAI Javelin. The use of a long (5 chord) tail moment to eliminate the need for down-thrust is the basic design feature along with the aft CG location to obtain maximum effectiveness of the stabilizer in riding the slightest of thermals with a 'rocking chair' motion.

In changing from ROG (Rise Off Ground) with a two wheel gear to ROW (Rise Off Water) configuration the only adjustment required is an additional 1/32"in wing incidence. In using 'Ethafoam' for floats there is only a minimum penalty for additional weight. Here again with the aft CG location the front float forward balances the two rear floats so that no noseweight ballast is required.

This is no one event airplane either since as an .09 FAI model, it won 2nd place as well at Los Alamitos in '63 for Jim Bradley, a Senior from Orlando, Florida. At Dallas ('64) my son Willy (age 10) took 2nd place in Jr. ROW with his Javelin Jr. His model adjusted as easily as the rest have.

The basic original Javelin was an outgrowth of several months talking and planning with George Vaslos when we were both engineers at Convair, in Ft. Worth back in 1960-61. George and I set out to derive a no-down-thrust, maximum altitude, flattest glide, no gadget model. Our first pass was to build 1/2A FAI models with a tail volume coefficient of 1.5, his with 40% stab and 33 chord tail moment; mine with a 5 chord tail moment and 30% stab. The longer tail moment model seemed to handle the power better so I built the .15 size which I used at Philadelphia in '61 to nose out the others in FAI at the Nationals. The 1/2A was next with the same for-mula..."

Javelin, MAN, October 1966.

Direct submission to Outerzone.

Supplementary files

Article pages, thanks to RFJ.


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oz9851 datafile

Javelin Jr  
by Bill Bell
from Model Airplane News
October 1966 
50in span
Tags: F/F
all formers complete :)
got article :)


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