Jessfix:
What do you mean by "Grown up airplane"?
No matter what you put an ADF in it will still be an inaccurate navigation aid.
For instance tracking outbound from a radio transmitter using ADF the further you go from the transmitter the less accurate the track information.
Why are we even discussing antiquated nav aids when we should be concentrating on modern aids such as GPS?
Unfortunately for flying training we seem to cling to old tecnology rather than learn new and far better methods. One aid that comes to mind here in Canada is the use of the E6B flight computer in flight schools when we have far better computers to do our calculations with. Never could figure that one out.
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The two most dangerous words in aviation.. "WATCH THIS"