Schoolgirl (oz816)

 

Schoolgirl (oz816) by Ken Willard from RCMplans 1965 - plan thumbnail

About this Plan

Schoolgirl. RC trainer biplane. For 3 channel RC with Cox .049 power.

Quote: "The Maestro's latest Single channel sportster is characterised by a flair for appearance and performance that promise to outdo even its renowned predecessors.

For the last couple of months I've been promising to publish the plans for a new sport biplane, only to keep postponing the deal because you fellows have been coming up with some timely items. Since I showed you the teaser picture in the January issue, l'd better get with it and put out the plans. so here they are.

The model is called the Schoolgirl - for obvious reasons. One short look at the plans and you'll note the family resemblance to the Schoolboy (oz1030) and the Schoolmaster(oz7534). Actually, the Schoolgirl was designed to fill the gap between the Schoolboy and the Schoolmaster, with respect to the power range. The Schoolgirl uses .020 or .049 power and like the others is gentle with the lower power, and really zippy with the larger engine. In fact, with .020 power you'll have to use the Cox TD.020 with the speccial 'high thrust' prop that's been designed for it. Otherwise. the model is sluggish. However, with that special prop, the Schoolgirl is a solid performer on .020 power, and will do excellent loops using the kickup elevator.

And why a biplane? Well, just because l love 'em, and it's been my experience that thousands of other modelers do, too. But if you're too lazy to build the lower wing, then leave it out and fly the model as a monoplane - it does a fine job. But to me it's a lot prettier as a bipe, and the lower speed makes it much more realistic.

So let's get on with the building and flying instructions. Actually, the building is simple and standard - just a few hints to go along with the plans are all you'll need.

Wings. Both wings are what I would call 'standard sheet balsa', as developed by Top Flite for their compact kits. Of course, they use a shaped leading edge, to the right contour. It's a chore. but it doesn't take too long.

For those of you who prefer built up wings, they fly just as well - They're just a little more work. If you want to do it though, I'd suggest a single 3/16 inch square spar along the top and exactly at the peak of the top camber. Cut out the ribs just as though you were using the sheet covering, then sheet the leading edge back to the spar on top and about one inch back on the bottom of both wings. Make the trailing edge either from trailing edge stock, or two pieces of 1/16 by 3/4 wide sheet..."

This is the RCM Schoolgirl as published by RCM. For the plan showing the Schoolgirl design as kitted by Top Flite, see Schoolgirl (oz8052).

Update 20/11/2017: Replaced this plan with a clearer copy, thanks to davidterrell80.

Supplementary file notes

Article pages, text and pics, thanks to hlsat.
Previous scan version.

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Schoolgirl (oz816) by Ken Willard from RCMplans 1965 - model pic

Datafile:

Schoolgirl (oz816) by Ken Willard from RCMplans 1965 - pic 003.jpg
003.jpg
Schoolgirl (oz816) by Ken Willard from RCMplans 1965 - pic 004.jpg
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  • Schoolgirl (oz816)
  • Plan File Filesize: 159KB Filename: Schoolgirl_RCM-316_oz816.pdf
  • Supplement Filesize: 958KB Filename: Schoolgirl_RCM-316_oz816_article.pdf
  • Supplement Filesize: 914KB Filename: Schoolgirl_RCM-316_oz816_previous.pdf
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Notes

* Credit field

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Scaling

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