Finally I was brave enough to install the motors.
I use two universal joint couplers in series thinking that will take care of any misalignment my eye can't see.
So: In how deep sh... trouble am I with the following?
When I turn the propeller with my finger, the whole stern-end of the hull moves rhythmically in all directions.
Also, the prop shaft - coupling joint moves sideways. The hull is ABS, so it kind of wobbles with the movement.
My question: How much of such movement would you tolerate? It is very difficult to attain total alignment.
My complaint: Why should we use brass shafts in the first place? They are curved almost by definition. Mine were curved and I tried to bend them straight. Can it be that I just have poor quality (Billings) prop shafts?
I haven't got all my electronics, yet, to see, if this movement is due to my finger pressing the shaft in every other direction while turning and the whole problem is washed away when it's the motor that turns the shaft. I really hope that my concern is premature!!
My build (bit.ly/Neddie_of_Hande) is a two-engine tug (about 90cm long).