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Old 10-02-2019, 01:03 PM
  #81  
quorneng
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Join Date: Jul 2008
Location: Cheshire, UK
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aaindthu
That fuselage look very nice.
Careful how you hollow out the rear fuselage. The foam you are using looks fairly weak so it will be a balance between strength and weight. Any weight saved close to the tail is far more useful!
Is that the final size of the tail plane and elevator? It looks rather narrow and of limited area.
Whilst the weight penalty of a high aspect ratio wing may be acceptable and necessary for 'performance' the same weight penalty in a tail plane is more serious.
It can be structurally more efficient to use a broader shorter span for a given area. As RC models have to be flown in a much smaller space and make tighter manoeuvres than full size it is normal to give them proportionally bigger tail and control surfaces.
Models are less aerodynamically efficient than full size so the penalty for over size surfaces is proportionally less significant. Having good control response and stability tends to increase the life of the model.

This 3 view is of a full size wooden glider that had a high performance at the time.
Click image for larger version

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Notice that compared to the high aspect ratio wing the tail plane is relatively short and stubby. Note also the very generous size fin and rudder.


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