TARMAC (Toowoomba Amateur Radio Model Aero Club) (Vale View, Queensland, Australia)

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Apr 21, 2016, 06:39 AM
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Hints and Tips

Click here to go to TARMAC Forum Index.

How to build your own incidence meter.

Mine is over thirty years old and still going strong.

For a model aircraft to fly at its best it needs to be built straight. No banana shaped fuselages.

Wing incidences can be checked with an incidence meter.
Check the alignment of plug in wings at the roots. Both/all wing panels need to have the same amount of washout as their opposite number.
Most thermal gliders need the main plane to be set at an angle of attack around two to three degrees greater than the tailplane. Check it.
The angle of attack on the left side of the stabilizer needs to be the same as the angle of attack on the right side of the stabilizer.
Last edited by Graeme Marion; Apr 25, 2016 at 01:31 AM.
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Apr 21, 2016, 06:46 AM
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How to locate your models present CG.

If you have a store bought model then you should start with the manufacturers recommended balance point.
If you designed and built it yourself then you probably have a good idea where the CG should go.

If your model is nose heavy or tail heavy it will not be flying at its best.
I don't know how many people try to trim out the effects of a lateral imbalance with ailerons.

This method will show you the present CG location to within one millimetre.
Apr 21, 2016, 06:50 AM
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Put your phone number on your model.

It is a good idea to put your phone number on your model in a prominent place.
This will increase your chances of getting it back should it fly away
Apr 21, 2016, 06:51 AM
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Getting maximum altitude from a given amount of current usage.

The most efficient climb out angle for a model with a lifting wing section like that on a Radian is not vertical.

Take advantage of the lift provided by the wings.
Climb out at an angle of around 65 degrees and you will get to a greater altitude for a given amount of current usage.
Apr 21, 2016, 06:52 AM
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Slippery Battery Cure.

Is your flight battery too slippery?
Can it easily move out of place?

The answer is to give the battery a light spray with contact glue.
Very little is needed to to give your battery a non-slip finish.
Apr 21, 2016, 06:53 AM
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High Visibility Paint.

I use "White Knight FLuoro Colour". It is a super bright flourescent paint.
Hobby shops sell it. So does Bunnings Hardware. It retails for $19:90 a 300g spray can.
My favourite colours are orange, yellow, green and blue.

Before painting any foam models, be sure to first wipe them down with a rag soaked in methylated spirits. This will remove any mould release and allow the paint to adhere better.

If anyone knows of a cheaper place to buy this paint, let us all know.
Apr 21, 2016, 03:59 PM
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High Visibility Paint.

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