Question id 653 - Principles of Flight (Aeroplane) - Quiz SPL - Sailplane Pilot License

Higher airplane mass, thin airfoil, taped gaps between wing and fuselage
Lower airplane mass, correct speed, retractable gear
Cleaning, correct speed, retractable gear, taped gaps between wing and fuselage
Forward C.G. position, correct speed, taped gaps between wing and fuselage