Question: During an engine test on the ground, a propeller thrust T=3000 N is generated on the 1800-kg airplane with mass center at G (the weight of the airplane acts at this point). The main wheels at B are locked and do not skid (i.e. there will also be a reaction in the X-direction at this support); the small tail wheel at A (only one wheel) has no brake.
1) The reactions at the supports are: RA= ? RBx=? RBy=?
2) Considering the engine to be off (T=0), the reactions at the supports are: RA=? RBx=? RBy=?