4 ms·

I can see $9000 as a fair price, but also expensive enough to buy one, scan it, and then CNC one of your own. I also wonder why it isn't coming out for two year

I can see $9000 as a fair price, but also expensive enough to buy one, scan it, and then CNC one of your own. I also wonder why it isn't coming out for two years, when they can already make them via CNC?

icegreentea2 3y ago
I think the prop includes the gear box needed to making it contra rotating. I also think the lifetime warranty being a pretty decent reason to not try to rig your own. I imagine it's the gearbox that they're sinking engineering and testing time into. They don't have any other contra-rotating products on market, so the gearbox will be new to them.
SkyPuncher 3y ago
If I’m not mistaken, these shapes are rather difficult to CNC. Particularly, the inside of the outer part where a traditional CNC would be blocked. I think this might require robotic-arm CNC which is much slower and much more expensive. I suspect they need two years to scale production
serf 3y ago
>I also wonder why it isn't coming out for two years, when they can already make them via CNC? conditions testing and certification is a likely reason. >I can see $9000 as a fair price, but also expensive enough to buy one, scan it, and then CNC one of your own. the gearbox and the process itself are expensive. the materials analysis and selection are expensive. the cfd is expensive. You're going to need a 5+1 axis machine at the least to perform the manufacturing. fwiw I think the price is ridiculous, but normal, because unfortunately I have experience with the marine prop market and realize that anything 'marine' or 'yacht' labeled has a 250% markup by default. a line from a sitcom occurs to me : 'This boat shit is expensive.'.
- getwiththeprog 3y ago
  What is the potential savings on diesel though? Can these be adapted to larger ships?
UncleEntity 3y ago
> I can see $9000 as a fair price, but also expensive enough to buy one, scan it, and then CNC one of your own. Ironically, that also includes the price of purchasing the CNC machine to machine it on. To me this looks like it would be very beneficial to research the viability of lost-casting from a 3d print and do away with even needing to CNC machine anything aside from the precision bearing surfaces. Though, admittedly, I don't know how viable cast propellers are.
- serf 3y ago
  >Though, admittedly, I don't know how viable cast propellers are. the vast-vast majority of marine propellers are cast first and then machine-finished. the typical materials for marine propellers are usually very casting-friendly.
- imtringued 3y ago
  >Ironically, that also includes the price of purchasing the CNC machine to machine it on. You mean ordering a part on Xometry or what? A CNC machine capable of this type of work will cost more than a house boat. For your budget you would be able to afford a pocket NC at best. Have fun trying to machine a propeller with that.

icegreentea2 3y ago

I think the prop includes the gear box needed to making it contra rotating. I also think the lifetime warranty being a pretty decent reason to not try to rig your own. I imagine it's the gearbox that they're sinking engineering and testing time into. They don't have any other contra-rotating products on market, so the gearbox will be new to them.

SkyPuncher 3y ago

If I’m not mistaken, these shapes are rather difficult to CNC. Particularly, the inside of the outer part where a traditional CNC would be blocked. I think this might require robotic-arm CNC which is much slower and much more expensive. I suspect they need two years to scale production

serf 3y ago

>I also wonder why it isn't coming out for two years, when they can already make them via CNC? conditions testing and certification is a likely reason. >I can see $9000 as a fair price, but also expensive enough to buy one, scan it, and then CNC one of your own. the gearbox and the process itself are expensive. the materials analysis and selection are expensive. the cfd is expensive. You're going to need a 5+1 axis machine at the least to perform the manufacturing. fwiw I think the price is ridiculous, but normal, because unfortunately I have experience with the marine prop market and realize that anything 'marine' or 'yacht' labeled has a 250% markup by default. a line from a sitcom occurs to me : 'This boat shit is expensive.'.

getwiththeprog 3y ago
What is the potential savings on diesel though? Can these be adapted to larger ships?

UncleEntity 3y ago

> I can see $9000 as a fair price, but also expensive enough to buy one, scan it, and then CNC one of your own. Ironically, that also includes the price of purchasing the CNC machine to machine it on. To me this looks like it would be very beneficial to research the viability of lost-casting from a 3d print and do away with even needing to CNC machine anything aside from the precision bearing surfaces. Though, admittedly, I don't know how viable cast propellers are.

serf 3y ago
>Though, admittedly, I don't know how viable cast propellers are. the vast-vast majority of marine propellers are cast first and then machine-finished. the typical materials for marine propellers are usually very casting-friendly.
imtringued 3y ago
>Ironically, that also includes the price of purchasing the CNC machine to machine it on. You mean ordering a part on Xometry or what? A CNC machine capable of this type of work will cost more than a house boat. For your budget you would be able to afford a pocket NC at best. Have fun trying to machine a propeller with that.