Idea Tester.pdf

IDEA TESTER

TEST YOUR IDEAS ON SMALL R.O.G.'S BEFORE

WASTING MATERIAL ON LARGER MODELS.

By Ed Lidgard

WITH supplies becoming more and more

scarce, necessity should make us modify our

modeling activities. Those outdoor models we used to

throw together with such abandon will have to be

limited so that supplies can be conserved for contest

ships.

position was already determined; all that remained

was the vertical position. The wing mount places the

wing in a parasol position and the model is quite

stable. It will, however, bank on fast power turns. To

begin with, the area between wing struts was covered

with tissue to simulate common pylon mounting

found on most gas models. A marked improvement

was noted in climbing characteristics, and the model

also became less "touchy" on adjustments. It must be

remembered that there is a difference between design

and adjustment characteristics.

The area between struts was divided into two

and replaced on top of the wing near the tips (see

photograph) , with care taken to align them properly.

This follows the theory developed by Carl Goldberg

and Louis Garami and worked out on Garami's Atom

powered model recently published in Air Trails. It's

really one swell idea! It worked to perfection. The

model rode almost perfectly level in fast climbing

spirals and thus obained more altitude. All-around

stability was improved and adjustments were not so

touchy.

This R. O. G. was built with this idea in mind.

It was to be simple, quickly built and still out of the

usual stereotypes. We wanted to incorporate as many

innovations as possible, but we wanted a rugged

model. If necessary, we were going to power it with

common rubber bands.

When it was completed, we found our time

had been very well spent. It flew with all the zip and

power of a Moffett job -- naturally with flights of

shorter duration. It formed the base for some

interesting experiments. We tried variously sized

rudders and verified some theories concerning the

effect of varying the area. Too much rudder causes

sharp turn to the left and, in extreme cases, a left spin.

We went to the other extreme by minimizing the area

until a right spin resulted. A warped wing or turn in

the rudder will naturally affect the results. The rudder

shown is exactly the right area. By using just a slight

right turn a good climbing right turn can be obtained.

Having solved the rudder problem, we turned

to the center of lateral area. Its fore – and -- aft

You may want to try other experiments which

might be risky on a more complicated outdoor model.

But whether you're an old hand or still a bit

inexperienced, you'll enjoy a model like this -- so let

'er go!

Scanned From June 1943

Air Trails

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