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Old Jan 13, 2013, 05:01 AM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
954 Posts
Quote:
Originally Posted by Allan S View Post
SlowBarless,
Would it be possible to also add suitable spinners and hubs to the prop list.
Regards, Allan.
What do you mean by suitable Spinners? There's been some confusion about shaft sizes lately. But you'll find the props can be made to fit almost any size spinners and hubs with the exception of the folding props which are designed around a certian sized yoke. I'll update the orginal post with shaft sizes to avoid any further confusion though.
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Old Jan 13, 2013, 05:11 AM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
954 Posts
Quote:
Originally Posted by Adrian_M View Post
Great looking props there SlowBarless, what is the biggest size you do for a non folding prop?
Cheers
The biggest I sell currently is a 7x10, but it's a bit of a strange prop as it only has a 5mm shaft hole. One of these days Ill be doing one with a bigger hub and an 8mm shaft size.
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Old Jan 13, 2013, 02:17 PM
KC Racing Team
Allan S's Avatar
Melbourne, Australia
Joined Aug 2008
145 Posts
Quote:
What do you mean by suitable Spinners?
Spinners which will handle the high rpm on direct drive (ie. good balance and retaining method).
Back in 2009 I purchased some 30mm CNC Aluminium spinners from the UK for 1/8" (3.175mm) shaft dia, but will be needing more in the future to suit 5mm shafts.

Regards, Allan.
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Old Jan 15, 2013, 08:00 AM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
954 Posts
I've had good luck with the MPJet Spinners. They are pretty much all I've ever used! The machining on them is first class but you can get a wobbly one every now and then. I believe people have had good success with the Graupner spinners and the pylon ones available from soaring USA too.
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Old Jan 17, 2013, 12:41 AM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
954 Posts
Big hub 7x10! 8mm prop shaft, 20mm hub diameter. Just what the doctor ordered


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Last edited by SlowBarless; Jan 18, 2013 at 06:35 AM.
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Old Jan 28, 2013, 05:09 PM
Aka: Tom Jenkins
ApexAero's Avatar
Palm Beach County, Fl.
Joined Aug 2008
4,390 Posts
Hi guys,
new to folders questions, I believe I need a 38-40mm spinner for a 4035. Am I understanding correctly that a 45mm yoke would be needed? New wing cores came in made of some very dense foam, now for the motor test stand and airframe build. After studying the threads that pertain to my build I've self winded a 550Kv 5+6 yy 1.5mm Scorpion 4035 and plan on 11s/12s packs. I think this motor will turn a 10 x 17 at 18k for that 250 goal on 12s and have fun all day on 11s. Feedback?
Tom
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Old Jan 28, 2013, 05:33 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
New Zealand, Tasman, Richmond
Joined Mar 2006
1,941 Posts
Hey Tom,

The Grapuner 38mm works with 42mm and 45mm hubs. It depends a little on the size of the root of the blade, but that's hard to tell without trial and error.
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Old Jan 28, 2013, 06:59 PM
Carbon fiber is our friend
Steve C's Avatar
United States, CA, Lodi
Joined Feb 2001
4,188 Posts
I used an RFM 38mm on my 4020, but I don't worry about the blades folding flat to the sides of the fuse. The only time I did any damage to my blades was from the plane spinning around and sliding backwards. Even then it was minor on the trailing edge and I flew it afterward.
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Last edited by Steve C; Jan 28, 2013 at 07:05 PM.
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Old Feb 05, 2013, 08:12 PM
Registered User
Joined Mar 2011
72 Posts
Do you have a link to these props?
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Old Feb 06, 2013, 05:16 AM
Aka: Tom Jenkins
ApexAero's Avatar
Palm Beach County, Fl.
Joined Aug 2008
4,390 Posts
A thought this thread was the link! see beginning of it all
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Old Feb 22, 2013, 04:15 AM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
954 Posts
Just keeping this thread alive. First photo of the new layup sawtooth blades. Testing will be hopefully tomorrow. I'll report back with how things went. Improvements are.

1. Higher carbon content, will be able to handle more power for sport flying
2. Torsionally stiffer, hopefully to minimise powerspikes and cavitation during initial acceleration
3. Same weight as the older blades



Ben
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Old Feb 22, 2013, 04:29 AM
Registered User
Darron's Avatar
London
Joined Jul 2003
887 Posts
Looks good Ben.
What layup are you using?
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Old Feb 22, 2013, 08:09 AM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
954 Posts
A fairly heavy one. Forcing out as much excess resin I can and replacing it with more carbon! Ive managed to get about 20% higher carbon content at the same weight.

Layup is spread tow skins and just standard modulus rovings. Quality carbon straight out of japan all round though. But other then that, nothing to special
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Old Feb 22, 2013, 02:08 PM
Livin it UP when Im goin DOWN
Arcteryxxx's Avatar
Norway, Telemark, Skien
Joined Feb 2010
4,260 Posts
Has anyone tried the M.Koch 8x23 prop in a sport setup?
I'm wondering how well it will work on a sub-warpdrive power level and how well it will push a 990g Reverb/miniHawk.
Just finished a static test with a 2221-6/KPG5.2 on 4S and 5S.
It was easy on the amps, and if it can push the model to about 80% of the pitch speed.......
1300W, 85A, 254mph pitch speed static.
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Old Feb 22, 2013, 03:02 PM
"The Judge"
sebbe's Avatar
Sweden
Joined Feb 2006
5,761 Posts
Arcteryxxx , I think peter M has tried that prop in his plasma....

thanks for the numbers...
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