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Old Jun 03, 2003, 03:34 PM
Name it, I've crashed it
Bill Germanson's Avatar
JAX, FL
Joined Feb 2002
1,556 Posts
APC-E or APC Sport props for larger sport planes?

Are most of you guys using the APC-E props on the larger motor/planes or the APC Sport props.

Reason I'm asking is that Aircraft-world.com has the APC Sport props labled "For larger Electric motors".

http://www.aircraft-world.com/^propellers.asp

I'm talking about setups like B50 or Mega 22-30-X with a 13-16" prop.

Thanks,

Bill
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Old Jun 03, 2003, 03:49 PM
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tlime's Avatar
Peoria,AZ
Joined Aug 2002
67 Posts
Bill,

I worked with Fred Burgdorf from APC and we developed the 22x10,22x12,24x10, and 24x12. They are labeled like all of the other E props. The state for electric flight only.

I hope this helps.

Sincerely,
Tim Lime
Hacker Brushless USA
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Old Jun 03, 2003, 08:28 PM
Name it, I've crashed it
Bill Germanson's Avatar
JAX, FL
Joined Feb 2002
1,556 Posts
Tim, Should I gather from your statements that the APC-E props are what should be used on electric motors even up to the largest ones (that could turn a 24" prop)?

Wonder why Aircraft-World is suggesting the APC Sport props for large electrics? Since they only seem to go up to 13" maybe they are for the high RPM direct drive planes like pylon planes.

- Bill
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Old Jun 03, 2003, 10:49 PM
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kmashima's Avatar
San Jose, California, United States
Joined Feb 2002
2,136 Posts
Bill
there's no need to be dealing with Aircraft world when you can go directly to APC. www.apcprop.com. I've only used their E props for large scale. Had to use a wood zinger prop until the 22 and 24 became available. You can't beat APC for light weight and performance.

Annie at APC provides prompt, accurate service. She's great. I've ordered from her about 10 times now and she's never made a mistake and I get the orders very quickly.

-- Kyle
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Old Jun 04, 2003, 08:54 AM
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Steven Horney's Avatar
Joined Jan 1999
419 Posts
I usually prefer the sport props on applications up to 11 inches in diameter, especially with faster-turning direct-drive set ups (I personally think the sport props offer better performance, perhaps because of the airfoil shape), but at larger diameters I prefer the e-props, since the sport props get quite heavy above 11 inches (and the mounting holes are generally too large).

Steve
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Old Jun 04, 2003, 09:29 AM
Name it, I've crashed it
Bill Germanson's Avatar
JAX, FL
Joined Feb 2002
1,556 Posts
Steve, Thanks. That's exactly what I needed to know.
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Old Jun 04, 2003, 11:33 AM
jrb
Member
jrb's Avatar
Edina, MN, USA
Joined Oct 1999
11,396 Posts
Here are a few thread speak to E vs. Sport:

http://www.rcgroups.com/forums/showt...hreadid=120497

http://www.rcgroups.com/forums/showt...ight=prop+myth

http://www.rcgroups.com/forums/showt...5&pagenumber=1
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Old Jun 04, 2003, 08:56 PM
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747drvr's Avatar
Dundas, Ontario, Canada.
Joined Sep 2001
776 Posts
I agree with Steve !

Marc
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Old Jun 05, 2003, 08:37 AM
310mph Kolibri T25 Swist
henke's Avatar
Sverige, Kronobergs Lšn, Ljungby
Joined Jan 2001
4,764 Posts
Muuuah!

24x12 arrived today here compared to the puny old 18x10

and no, this plane will not fly with the 24" prop, will settle with a 20x13 for some more speed. 24x12 is for a later, larger project.



/Henke
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Old Jun 07, 2003, 04:27 PM
Registered User
coventry uk
Joined Nov 2002
824 Posts
has anyone tried a 3d fun fly prop as i have some 13x4w props and was thinking of trying them on my cougar when my twister 29 comes.

t.n
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Old Jun 08, 2003, 12:36 AM
Name it, I've crashed it
Bill Germanson's Avatar
JAX, FL
Joined Feb 2002
1,556 Posts
Good question on the 3D props - saw those too and had not heard anything about them.

- Bill
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Old Jun 08, 2003, 04:46 AM
310mph Kolibri T25 Swist
henke's Avatar
Sverige, Kronobergs Lšn, Ljungby
Joined Jan 2001
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Hi

as I understood it the 3D props are for the weak .40 and .46 2 stroke engines, that can not hover a normal .40 size plane on a normal prop like 12x6 or so.

atleast for me, I use geard motors for 3D, and swing larger props slower, gettigh a higher eff. as they turn pretty slow a 13x4 would be to slow for any forward flying

my friend tried a 13x4 on his directdrive HP300/30, but no luck vibrated heavily. (might be a faulty prop he got)

/Henke
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Old Jun 08, 2003, 04:22 PM
Registered User
coventry uk
Joined Nov 2002
824 Posts
well the 13x4 3d apc prop i have is for a weston hype with a weston [ webra ] 50 size ic engine which produces 65% more power than an OS and if you see the surface area of this prop you could see its made to shift a lot of air.
any way time will tell just have to wait for my twister 29.

t.n
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