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Nov 19, 2012, 08:11 AM
SB7
SB7
I am actually really slow
Quote:
Originally Posted by D.English
SlowBarless,

I will show prop finished, Paul has designed a new prop for the new airplane and it is fixed..

DE
Any updates with the 7x10's DE?
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Nov 19, 2012, 08:32 AM
Something Something RC
rlc2052's Avatar
Quote:
Originally Posted by SlowBarless
Pretty sure it comes with a spinner... There's no way the blades without a spinner could be worth that much.
Didn't see your post

Yes is comes with a spinner.
Nov 19, 2012, 09:28 AM
Registered User
SB, No I havent layed one up yet. It is for our HK powered test plane to try some new ideas and the plane isnt quite finished yet..

I saw the cad drawings of the prop that Paul has designed for our new F5D project and it looks really nice, cant wait to get some aluminum on the mill to make some molds.. And then some alloy for the new plane.

DE
Nov 19, 2012, 11:50 AM
Registered User
Mreyello's Avatar
DE;
Be careful with Pauls F5D designs, sometimes he even forget to add the basics like elevator!!

Yello
Last edited by Mreyello; Nov 19, 2012 at 02:28 PM.
Nov 19, 2012, 02:13 PM
Registered User
Yello,

Yes he does, even he says this one is risky,,,
Nov 19, 2012, 02:27 PM
Registered User
Mreyello's Avatar
Quote:
Originally Posted by D.English

Yes he does, even he says this one is risky,,,
F..ckin hell
if even he declares it as risky this one will be fast!!!!

Yello
Nov 28, 2012, 10:57 AM
Registered User
AndrésMtnez's Avatar
Subscribed!

This is a great idea, I´m discovering props I didn´t know



One question, max power or max RPM are proportional parameters if you´re thinking about an specific prop, right? Why the max power for Marcus Koch props and max RPM on Slow Barless props?




I´m the only one thinking this should be a sticky?
Nov 28, 2012, 11:21 AM
300 mph club ;-)
M. Koch's Avatar
Hi Andres!
My props are tested up to 35.000 rpm on the smaller ones! The bigger ones are tested to about 20.000-22.000 rpm which consumes the 8-12kW we fly at the moment in our speeders!
A lot more props come soon! I´m hardly working on them !

Ciao, Marcus
Nov 28, 2012, 11:53 AM
SB7
SB7
I am actually really slow
Quote:
Originally Posted by AndrésMtnez
Subscribed!

This is a great idea, I´m discovering props I didn´t know



One question, max power or max RPM are proportional parameters if you´re thinking about an specific prop, right? Why the max power for Marcus Koch props and max RPM on Slow Barless props?




I´m the only one thinking this should be a sticky?
Because tensile failures are the most likely when it comes to props and Max RPM limits are a good way to ensure the tensile loading of the prop is kept low enough to be safe.
Last edited by SB7; Jul 08, 2015 at 07:25 AM.
Nov 28, 2012, 01:38 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
Also, mine are rated to a power level since I don't necessary know the RPM of the system used to test. This has the obvious downside as mentioned that differing setups are different efficiency....
Nov 28, 2012, 08:20 PM
Suspended Account
Still waiting to buy a 8x23
Dec 10, 2012, 12:03 PM
today I got mail from stefan baier and I screwed together another prop for my 5035-evo powermonster.

it's a8 blade 9,1" x 23" folder.



looks just like the prop of A 400M :

you could call it "unducted fan drive".
hope for having a lot of fun with it.
Last edited by scorpion-fan; Jan 06, 2014 at 02:25 PM.
Dec 10, 2012, 12:21 PM
SB7
SB7
I am actually really slow
Quote:
Originally Posted by scorpion-fan
today I got mail from stefan baier and I screwed together another prop for my 5035-evo powermonster.

it's a 9,1" x 24,5"folder.

hope for having a lot of fun with it.
Damnn, that looks like fun to balance
Dec 10, 2012, 12:33 PM
no.
you will find, as more blades you have, as less balancing is needed.
if all blades have the same weight. (I usually check them for 0,01g)

it's noise is very special.
Dec 10, 2012, 03:26 PM
What is Highspeed ?
Rolf D.'s Avatar
Quote:
Originally Posted by scorpion-fan
today I got mail from stefan baier and I screwed together another prop for my 5035-evo powermonster.

it's a 9,1" x 24,5"folder.



looks just like the prop of A 400M :



you could call it "unducted fan drive".
hope for having a lot of fun with it.

tell me when you go flying, than I do not visit the parents of my girlfriend in thüringen
wish u fun with it, hope all works well.
regards
rolf


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