Posted by: ship's doctor
« on: 07 June 2019, 09:25:26 »A little bit of progress ...
A frames and prop tubes have been installed - these are Raboesch M4 extended type shafts. Rudder built from brass sheet - will build this up into a streamlined profile later. Rudder linkages and servo installed.
Once the prop tubes and A frames were aligned correctly and tacked in with epoxy I used a small fibreglass kit to secure the tubes into the hull. This went a bit wrong as I think the fibreglass contracted slightly as it set - shafts would no longer turn freely, when taken apart the A frames were now about 0.5mm out of alignment. So I had to drill out the A frames and re-set in the hull - now working fine. Next time I would get the prop shafts fully installed, then align the A frames after.
The motors sit quite low in the hull so I've made a mounting block to fit the hull section, there will be four mounting screws for each motor which can be used to adjust fine alignment.
Hopefully more to follow soon!
A frames and prop tubes have been installed - these are Raboesch M4 extended type shafts. Rudder built from brass sheet - will build this up into a streamlined profile later. Rudder linkages and servo installed.
Once the prop tubes and A frames were aligned correctly and tacked in with epoxy I used a small fibreglass kit to secure the tubes into the hull. This went a bit wrong as I think the fibreglass contracted slightly as it set - shafts would no longer turn freely, when taken apart the A frames were now about 0.5mm out of alignment. So I had to drill out the A frames and re-set in the hull - now working fine. Next time I would get the prop shafts fully installed, then align the A frames after.
The motors sit quite low in the hull so I've made a mounting block to fit the hull section, there will be four mounting screws for each motor which can be used to adjust fine alignment.
Hopefully more to follow soon!