CMD CNC props. Anyone tried them

[MrUnlimited]

Guy's

I was surfing on the CMD website and wondered if somebody tried the CNC machined props on their 1/8 scale. They look nice (no I dont't mean the lady in the background :lol: ) and it seemed they don't have to be balanced. If somebody tried them which prop did you use.

 

[brandonclan]

This is the second one I've heard that broke....One of them was running when it happened...I don't know how this one got broken.

http://www.intlwaters.com/index.php?showtopic=33802

 

[SayMikey]

This is the second one I've heard that broke....One of them was running when it happened...I don't know how this one got broken.
http://www.intlwaters.com/index.php?showtopic=33802

2 guys in our club run them on sport 40s setup right they fly

 

[BullDogRacing]

Gaday Guys

I to run one on my sport 40 with the new rossi 4 power and she's fine.

Brad

 

[MrUnlimited]

Gaday Guys I to run one on my sport 40 with the new rossi 4 power and she's fine.

Brad

Never broke one? I think the reason why they sometimes break is that there is weak spot in the material.

 

[dwilfong]

I have one and if you look at the base of the blade there are sharp tooling mark's. I think this is were a stress fracture can form.

On the one I have I have removed the sharp tooling mark's. I think this is the root of the problem.

 

[nitrotwin]

I was told by a expert in props that it was in the grain of the material.I guess the material has a very corse grain. Not saying they will not work but maybe not as strong

 

[Douglas P Shepherd]

I was told by a expert in props that it was in the grain of the material.I guess the material has a very corse grain. Not saying they will not work but maybe not as strong

I have been making my own CNC props at work. Boss loves me @ 15 hours mill time @ $100.00. per hour mill time (Not costing me!!!) But it is a big gain in performance.I have been making them out of 7075 T6 with a max of .060 blade thickness. Have not bent or broke a blade with 50 laps of one propeller and 14 laps on another.Getting ready to make a new propeller out of stainless @ .050 max blade thickness. Doug Shepherd

 

[MrUnlimited]

I was told by a expert in props that it was in the grain of the material.I guess the material has a very corse grain. Not saying they will not work but maybe not as strong

I have been making my own CNC props at work. Boss loves me @ 15 hours mill time @ $100.00.But it is a big gain in performance.I have been making them out of 7075 T6 with a max of .060 blade thickness. Have not bent or broke a blade with 50 laps of one propeller and 14 laps on another.Getting ready to make a new propeller out of stainless @ .050 max blade thickness. Doug Shepherd

Doug, that is great to hear. Can you show us of some pics of your cnc props?

 

[lovehydro]

I am looking for a 5083/3 to try on my scale hydro. If anyone has a good one they would like to sell please contact me at [email protected].

Paul

 

[Chuck Hildreth]

I run one on my sport 40. My dad made it work and it runs great. It has a lot of lift so you have to ajust the boat to the prop, or have someone like my dad tweak it a little. Its on its second season and still looks great.