Well, Compound delta is better than Canard because the canards disrupt the flow of air downstream. Hence, the flow is not streamlined over the main wings, considerably decreasing the lift produced, as the larger wings at the back are responsible for lift production and the canard is responsible for manoeuvrability. The entire canard moves, not just a small portion of it as is the case with wings, where only the tip (ailerons) move. So larger disruption downstream.
The flow wont get much disturbed in Compound delta design.
Wrong Taj, mate! This is an old school view that only applies to improperly coupled canards or
to decoupled ones as the long moment arm types.
In fact, when the Rafale, which has the most coupled airflow system ever with the canards responsible
for generating and modulating the airflow over the wing, was in demo, the French Navy thought it could
not be done and that the approach landing speeds would never be low enough for their requirements.
A traditional delta comes in at 160-170 knots. The Rafale has a 110 knots carrier landing speed due to it.
You can check what this implies by grabbing any good clear close-up video of that plane in flight.
The movement of the canards will easily be seen as counter-intuitive. They go up when you'd think
they should go down and vice-versa. That's simply because they are not acting as control surfaces
but rather modulating the airflow on the combo, body and wing for the elevons, flaps, trim tabs to use.
It is also then evident why this has to be done by computer and cannot left to the pilot to sort out.
Your reasoning was not wrong in and of itself, just outdated.
Have a good day, Tay.
P.S. zahidiqbalnara, Novi avion is a Rafale copy with one engine. Not bad but unlikely to get past drawing board.
