..A Ground-Ground-Adjustables Propeller Calculator is a type of aircraft propeller that can have its blade pitch angle manually adjusted while the aircraft is on the ground. This allows for fine-tuning the propeller’s performance characteristics to optimize for different flight conditions.The forula used for ground-adjustable propellers is similar to the thrust equation for fixed-pitch propellers, but it accounts for the adjustable pitch angle (β) and the resulting blade angle of attack. The formula for thrust in this context is:
- T is the thrust produced by the propeller.
- π (pi) is approximately 3.14159.
- n is the propeller’s rotational speed in revolutions per minute (RPM).
- r is the radius of the propeller blade.ρ (rho) is the air density.
- V is the velocity of the aircraft through the air.
- Cp is the power coefficient, which depends on the specific design of the propeller.
- η (eta) is the efficiency of the propeller.