Table 9: Effect of lift equilibrium on pitch trim strategies.

Strategy

I

II

VI

Concept

Equal deflection of all control surfaces

Deflection of elevator only

Equal contribuition to lift from each control surface

Cruise lift equilibrium

No

Yes

No

Yes

Yes

CL

α

CM (δ = 0º)

0.10588

0.71789°

0.02441

0.10588

1.8406°

0.04971

0.10588

0.71789°

0.02441

0.10588

2.0727°

0.05601

0.10588

2.27940°

0.05968

δ1

δ2

δ3

δ4

δ5

4.46780°

4.46780°

4.46780°

4.46780°

4.46780°

1.7200°

1.7200°

1.7200°

1.7200°

1.7200°

8.7977°

0.0°

0.0°

0.0°

0.0°

10.367°

0.0°

0.0°

0.0°

0.0°

6.6990°

7.6277°

2.7478°

14.971°

5.3920°

CD

ΔCD

ΔCD/CD (%)

0.00659

+89

+15.6

0.00766

+197

+34.5

0.00553

-16

-2.8

0.00551

-18

-3.2

0.01089

+520

+91.4