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Old Jun 14, 2001, 10:06 PM
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Joined May 2001
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5.5 x 5.5 Folder Prop?

Does anyone know where to find a 5.5 x 5.5 folding prop? Planes just don't like to land on the Cam 5.5 - they break or break your plane. The Cam 5.5 is a great prop, it would be even better as a folder with a 1-3/16" dia. spinner.
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Old Jun 15, 2001, 09:11 AM
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Neil Stainton's Avatar
United Kingdom, England, Stratford-upon-Avon
Joined Feb 2001
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David Fee may chip in here, he made some sample 5x5 folders that were closer to 5.5x5.5.

BTW what motor are you using the 5.5x5.5 props on?

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Old Jun 15, 2001, 07:12 PM
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Palo Alto, CA, USA
Joined Nov 2000
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APC now makes 5x5 and 6x3 folders. The hub comes in different widths, starting with 35mm. I am running the 35mm hub with the 6x3 blades on AF 010 at ~13000 RPM. I can't remember what is the max RPM rating.
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Old Jun 15, 2001, 08:26 PM
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Thank you both, I think I will look into the APC's - (easily available). I am running a Kontronik BL400-22 12,800 rpm on 7 cell 600AE's 5.5x5.5 Cam prop.
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Old Jun 17, 2001, 12:28 AM
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United States, CA, San Mateo
Joined Jun 2000
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Try the CAM 5 x5 or the 6x 5.5. APC does not work well on low rpm. The 12800 is low rpm. My sp400 with 4.7 x 4.7 spins at 15600. The APC does not performs as well as the Grauper CAM at lower rpm.

Try the Graupner 6 x 5.5.

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Old Jun 18, 2001, 02:54 PM
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San Diego, CA, USA
Joined Mar 2001
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Hi Keith...
Sorry it took me so long to chime in... I've not been home much lately. Anyway, yes... I did start molding some carbon folders based on a 5x5 CAM prop, but they ended up being probably more like 5.5x5.5, as Neil correctly stated. As a result, they're maybe a bit too much prop for a S400, but they might be ok for your brushless motor, if you had an appropriate hub. Links are below...

Good luck and have fun!

<a href="http://www.members.home.net/davidfee/PROJ.html"> <IMG SRC=http://www.members.home.net/davidfee/images/s_propopen_s.jpg width="108" height="60" border="0"></a> http://www.members.home.net/davidfee/PROJ.html
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