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I have been converting the American Express toy yacht to Hobby grade.
Current hardware: 4mm straight shaft, 55mm turn fins, 95mm rudder, 40mm Aluminum prop from the UDI Arrow, 2200KV SSS 2960 motor and 50A Flycolor ESC.
She runs nice and stable at 20-25MPH but is running very wet and not coming up on plane.
Due to the size of every motor I have tried, the prop is pointing down a bit and I cannot get the shaft angle parallel to the keel.
Only way I could would be to use a universal joint and I do not want to go that way.
I have decided to move to a flex shaft with a bend in it so I can get the prop angle right and get the boat up on plane.
Now, on to my question: Flex shaft-Stuffing tube options.
I picked up the Micro Strut for a 4mm prop shaft from OSE and need to choose a flex shaft and stuffing tube for it.
The strut has space for a 5mm stuffing tube to fit into it so I would like to stay with that size but not sure if I should go with the thin or thick wall tubing.
From what I gather I have 2 options:
1: 5mm thick wall (5mm OD, 4.1mm ID) and .130 cable with 4mm shaft. That would give me .62mm clearance on each side of the cable.
2: 5mm thin wall (5mm OD, 4.55mm ID) and 4mm cable with 4mm shaft. That would give me .275mm clearance on each side of the cable.
I would prefer to use the 4mm cable but not sure that would be enough cable clearance in the stuffing tube with a shallow bend in it.
Also, the 4mm cable has a 70mm long prop shaft and the .130 cable has a 76mm one. That would make the flex cable end of the prop shaft stick into the stuffing tube 7 to 13mm so I cannot go any small I.D. then 4mm.
I will be using a 2100KV 42mm Outrunner motor (Proboat Recoil) on 3s and moving the 2960 SSS motor to another boat if that makes a difference in your suggestions.
Let me know what your thoughts are please? Don't want to get the wrong combo and waste the money and need to rebuild it a 3rd time.
I will post up some pictures once I figure out how.
Thanks for your input!
Current hardware: 4mm straight shaft, 55mm turn fins, 95mm rudder, 40mm Aluminum prop from the UDI Arrow, 2200KV SSS 2960 motor and 50A Flycolor ESC.
She runs nice and stable at 20-25MPH but is running very wet and not coming up on plane.
Due to the size of every motor I have tried, the prop is pointing down a bit and I cannot get the shaft angle parallel to the keel.
Only way I could would be to use a universal joint and I do not want to go that way.
I have decided to move to a flex shaft with a bend in it so I can get the prop angle right and get the boat up on plane.
Now, on to my question: Flex shaft-Stuffing tube options.
I picked up the Micro Strut for a 4mm prop shaft from OSE and need to choose a flex shaft and stuffing tube for it.
The strut has space for a 5mm stuffing tube to fit into it so I would like to stay with that size but not sure if I should go with the thin or thick wall tubing.
From what I gather I have 2 options:
1: 5mm thick wall (5mm OD, 4.1mm ID) and .130 cable with 4mm shaft. That would give me .62mm clearance on each side of the cable.
2: 5mm thin wall (5mm OD, 4.55mm ID) and 4mm cable with 4mm shaft. That would give me .275mm clearance on each side of the cable.
I would prefer to use the 4mm cable but not sure that would be enough cable clearance in the stuffing tube with a shallow bend in it.
Also, the 4mm cable has a 70mm long prop shaft and the .130 cable has a 76mm one. That would make the flex cable end of the prop shaft stick into the stuffing tube 7 to 13mm so I cannot go any small I.D. then 4mm.
I will be using a 2100KV 42mm Outrunner motor (Proboat Recoil) on 3s and moving the 2960 SSS motor to another boat if that makes a difference in your suggestions.
Let me know what your thoughts are please? Don't want to get the wrong combo and waste the money and need to rebuild it a 3rd time.
I will post up some pictures once I figure out how.
Thanks for your input!
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