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Old Dec 16, 2014, 02:49 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
New Zealand, Tasman, Richmond
Joined Mar 2006
2,086 Posts
Nice result Marcus, the current draw makes it an "affordable" option for speedflyers!
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Old Dec 19, 2014, 05:06 PM
Registered User
Hemet California
Joined Jul 2009
837 Posts
I have a question for the prop guys here. If you have a twisted yoke like a +2.5 or +5 what does that increase the pitch of a prop to, as I understand it the twist in the yoke is a measurement in degrees where pitch in a prop isnt. Lets say a 2.5 yoke on a 10 pitch prop.

can someone explain it?

Thanks
Dave E
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Old Dec 19, 2014, 09:34 PM
The Prop is Where its At!
blitzu's Avatar
New Zealand, Bay Of Plenty, Omokoroa
Joined Dec 2012
870 Posts
Hey Dave! Hows that single blade coming along?

A +2.5º hub is equivalent to 1" of pitch,5º is equivalent to 2" of pitch.

10" pitch prop on a 2.5º hub is 11" of pitch...
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Old Dec 19, 2014, 10:19 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
New Zealand, Tasman, Richmond
Joined Mar 2006
2,086 Posts
Not exacty Craig! The pitch distribution of the blade needs to be taken into account. On average 1" is approx 2.5 deg, but not always
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Old Dec 19, 2014, 11:01 PM
The Prop is Where its At!
blitzu's Avatar
New Zealand, Bay Of Plenty, Omokoroa
Joined Dec 2012
870 Posts
Ok in most cases then Deano
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Old Yesterday, 06:37 AM
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WimH's Avatar
Belgium, Flemish Region, Oosterzele
Joined Dec 2001
5,499 Posts
It also depends on prop diameter. Here is an excel spreadsheet to calculate http://www.rcgroups.com/forums/showp...97&postcount=8
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Old Yesterday, 01:28 PM
Registered User
Hemet California
Joined Jul 2009
837 Posts
thanks all, that will get me in the ballpark, doesn't need to be exact.

B, no single blade prop for me, just making plugs to try stuff.... I am having a real hard time with this F5D stuff and am jumping all over the place. I cant afford to do all the testing and different motors, esc's, props and fancy cnc molds and then there is the problem that all the comps and WCs are usually in Europe which is even more expensive it has me VERY close to chucking it all and going to play with gliders, at least there are a lot of comps around here for that.

D
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Old Yesterday, 01:48 PM
310mph Kolibri T25 Swist
henke's Avatar
Sverige, Kronobergs Län, Ljungby
Joined Jan 2001
4,836 Posts
Quote:
Originally Posted by ehelibuff View Post
My GM 5x5 was $75. Single should be half that.. I'd like to off my GM. I never use it....
No you are wrong. Get the GM for $75, fly it a hand full of times then sell it for €179 when you broke a blade off
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Old Yesterday, 08:28 PM
The Prop is Where its At!
blitzu's Avatar
New Zealand, Bay Of Plenty, Omokoroa
Joined Dec 2012
870 Posts
Quote:
Originally Posted by D.English View Post
chucking it all and going to play with gliders, at least there are a lot of comps around here for that.

D
I hear you Dave-exactly the same in N.Z.
Went to a pylon meet 2 weeks ago-there was x2 electric's,the rest were greasy Quickee 500's.

Glider scenes semi-decent,most probably cause we have Joe Wurts pushing things along, with a few more new classes being introduced as well...
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