available pairs between 30 and 39mm dia, recommendations?

[ManuelW]

Hello Guys,

for a new project I'm looking for some recommendation for available props. I need pairs with a diameter between 30 to 39mm, hub (M4, 4mm DD or 3/16"DD) is not that important at the moment. They will be for a high rpm application so strength/durability is an issue

So far I've found:
-Octura X430 (1/8" hub)
-TFL Aluminium props: pretty disappointed from quality, also leading edge VERY thick despite being called RTR
-different prop shop props but come cast raw and quite pricy

Does anyone have different recommendations, for example where to get some decent CNC aluminium or steel props?

regards,
Manuel

[dasboata]

Hi manuel I was off on my quote I will check my charts and see what I can come up with I did a ten shock prop yeserday they are aluminiom but I did like there disign try looking that way

[dasboata]

Prop shop 2714 3014-4214-3514-3720 all come in L & R 2-3- and some 4 blades

[Steven Vaccaro]

there is a reason aluminum props have a thicker leaded edge than stainless or beryllium cooper.
Aluminum isn't as strong as the other metals.
If made to thin, the edges will crack under load. Been there and done that.

[dasboata]

there is a reason aluminum props have a thicker leaded edge than stainless or beryllium cooper.
Aluminum isn't as strong as the other metals.
If made to thin, the edges will crack under load. Been there and done that.

I agree but not sure of Manuel app. In my opinion aluminium is not the right material for hi RPM props !!

[Steven Vaccaro]

I agree but not sure of Manuel app. In my opinion aluminium is not the right material for hi RPM props !!

I would tend to agree. I have used them in plenty of 20-30k setups with no problems.

[royalcasa]

What would you consider high rpm. I will be using twin 2550kv 40m 1.4 cnc props on 4s. I think the motors will be running at about 32000 rpms thanks.

[ManuelW]

I'd definitely consider my application a high-rpm one, will definitely spin 55.000, maybe more. MHZ stocks some decent aluminium props with ceramic coating, I do also know these are nicely sharp but start just at 40mm diameter. Imho a sharp trailing edge wont really harm the strength, most critical for me is the area where the blade is joint to the hub and the leading edge of the blade.

regards,
Manuel

[dasboata]

I'd definitely consider my application a high-rpm one, will definitely spin 55.000, maybe more. MHZ stocks some decent aluminium props with ceramic coating, I do also know these are nicely sharp but start just at 40mm diameter. Imho a sharp trailing edge wont really harm the strength, most critical for me is the area where the blade is joint to the hub and the leading edge of the blade.
regards,
Manuel

I have 50-75 broken props down stairs and they all broke at the blade root where the blade meets the hub so yes you are correct