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Pattern Props

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Old 12-16-2008, 10:47 PM
  #1
cv22fe
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Default Pattern Props

Hi folks,
I'm trying to get back in the game. I've purchased a new YS 170, new airplane, and I'm working on making a decision on a new radio.
I need some help with prop selection for the YS 170.

Thanks Donny Wright
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Old 12-17-2008, 09:30 AM
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Default RE: Pattern Props

APC 18.1 x 10 wide
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Old 12-17-2008, 02:15 PM
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Hey Donny,
Glad to see you getting back in. just let me know if I can help
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Old 12-17-2008, 02:31 PM
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Hi
With nitro 25 % or above; APC 18,1x11
Regards
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Old 12-17-2008, 04:00 PM
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Default RE: Pattern Props

Why such high pitches on these props? Is it due to high amounts of torque? I went from a 15x10 to a 16x8 for more climb and better throttle response on my 120AX, but see most 'pattern props' are anywhere from 10-14" pitch.
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Old 12-17-2008, 05:40 PM
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Default RE: Pattern Props

Hi Donny.
APC 18.1x10 Pattern, 30% Heli cool power fuel.
Hope to see you in Ocala.
Regards.
Humberto Pomales.
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Old 12-17-2008, 05:49 PM
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rcpattern
 
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Default RE: Pattern Props

Donny,

Glad to see you are back flying. 18.1 X 11 is the best prop I've found for the 1.70. Slows down great on downlines, but still gives you the ability to fly a little faster on windy days than the 18.1 X 10.

Hope to see you at some contests next year,

Arch
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Old 12-17-2008, 06:03 PM
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Default RE: Pattern Props

gaRCfield:

Asked this question many times a few years ago. You actually have two items in your questions;
1. four strokes have more midrange torque than two strokes and get propped accordingly, and 2. you want cruising speed at half throttle or close to it, reserving power for the more demanding maneuvers without sacrificing speed. Higher pitch = cruising air speed at lower rpm thereby reserving power.
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Old 12-17-2008, 06:20 PM
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Jetdesign
 
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Thankyou.
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Old 12-17-2008, 07:17 PM
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Thanks for the info. Hope to see you all at local contest and NATS.

Donny
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Old 12-19-2008, 09:41 AM
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Default RE: Pattern Props

do anyone know where i can get info. explaining the diam. and pitch on the prop. i'm into elec. and new to rc.

thanks
gramps
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Old 12-19-2008, 01:49 PM
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RC_Pattern_Flyer
 
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Donny, hope to see you flying FAI... whilst I will be flying masters. hehehe.

Chuck
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Old 12-19-2008, 03:51 PM
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Default RE: Pattern Props

What about 17x13 or 18.1x12 ?
Please , compare it to 18.1x11
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