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APC-E 21x14 vs. Pt Model 21x14 Carbon

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APC-E 21x14 vs. Pt Model 21x14 Carbon

Old 11-26-2009, 01:26 PM
  #1  
Ricardo M.
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Default APC-E 21x14 vs. Pt Model 21x14 Carbon

I wanted to know which of theese props is better. Let´s suppose that cost is not an issue and both have the same price, which is more eficient, quieter, lighter. The PT is stiffer, is that an advantage ?
Which one would you choose?

Thanks.
Ricardo.
Old 11-26-2009, 04:41 PM
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Hans Meij
 
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Default RE: APC-E 21x14 vs. Pt Model 21x14 Carbon

The APC is more quiet and more efficient, the PT is lighter and stiffer. Tried both and liked the APC more
Old 11-27-2009, 09:40 AM
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joenella
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Default RE: APC-E 21x14 vs. Pt Model 21x14 Carbon


ORIGINAL: Hans Meij

The APC is more quiet and more efficient, the PT is lighter and stiffer. Tried both and liked the APC more
Well the PT is lighter and stiffer and this giving better effeiciency, quicker spool up, less load on the bearing/shaft, less gyroscopic influense and not to forget much BETTER LOOK
Old 11-27-2009, 10:29 AM
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Hans Meij
 
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Default RE: APC-E 21x14 vs. Pt Model 21x14 Carbon

At least the PT prop I have has thicker tips and a more blunt trailing edge. I could notice sound and performance differences with the APC.
Old 11-27-2009, 06:05 PM
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DaveL322
 
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Default RE: APC-E 21x14 vs. Pt Model 21x14 Carbon

The APC design is extremely efficient, so deviating from this design (airfoil, planform, TE thickness, etc) is not likely to increase efficiency. IF all other things are equal, lighter and stiffer is better for performance, with the possible exception of noise - some hollow CF props resonanate (like a drum) and are louder than an APC.

Regards,

Dave

Old 11-28-2009, 08:35 PM
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Ricardo M.
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Default RE: APC-E 21x14 vs. Pt Model 21x14 Carbon

Thank you very much for your replies. I will keep useing the APC.
Old 12-07-2009, 12:38 PM
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ytell
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Default RE: APC-E 21x14 vs. Pt Model 21x14 Carbon

What is the weight difference between the 2 props?

Yoav
Old 12-07-2009, 12:49 PM
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Hans Meij
 
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Default RE: APC-E 21x14 vs. Pt Model 21x14 Carbon

105,8 versus 68,8
Old 12-07-2009, 02:23 PM
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Pro pattern
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Default RE: APC-E 21x14 vs. Pt Model 21x14 Carbon

Hello Hans,

I’ve recently, since a few months now live in The Netherlands. In the Hague to be specific.
I’ve done this to continue with my studies at de Haagse Hogeschool in Delft.
And was wondering where do you guys fly.

It may be possible for me to bring my plane from home, Aruba.
Miss flying at times, but at the same time I don’t have as much time as I would like.

Though I’m really thinking to bring my Leviosa so I could fly and keep learning. Hah.

Regards,
Daniel Koolman
www.arubarc.com
Old 12-07-2009, 03:12 PM
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ytell
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Default RE: APC-E 21x14 vs. Pt Model 21x14 Carbon

WOW, that's not bad at all.
Good to know there is another weight saving option in case we need it.

Thanks

Yoav
Old 12-07-2009, 04:04 PM
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Hans Meij
 
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Default RE: APC-E 21x14 vs. Pt Model 21x14 Carbon

Hi Daniel,

My club is in Utrecht: http://www.modelvliegclubutrecht.nl/
It has some in F3A paticipating members.

Around Gouda is the GMVC http://www.gmvc.nl/
It has a F3A community too

Dutch F3A page: http://kunstvlucht.modelvliegsport.nl/F3A/
(next sunday there is a meeting)

Regards,
Hans

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