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Pattern Prop Pitch - 7/8/2002 4:57:37 PM   
Erick Royer



Posts: 438
Joined: 1/25/2002
From: Torrington, CT, USA
Status: offline 		Why are props with high pitch values considered PATTERN Props?

I see 11x11, 12x11, etc classified as Pattern Props. I assume that these props would give you more speed and less pulling power for vertical maneuvers.

Thanks
       Post #: 1

Pattern Prop Pitch - 7/8/2002 10:33:45 PM   
Geistware



Posts: 12946
Joined: 4/9/2002
From: Locust Grove, GA, USA
Status: offline 		This brings up a good question.
From my reading, pattern seems to rely on speed and reduced drag profiles while IMAC relies on pulling power and not speed. I would imaging that you have less time during a pattern routine to prepare for the next maneuver compared to IMAC.

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(in reply to Erick Royer)
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timing and air speed - 7/9/2002 12:29:43 AM   
Hubb


 

Posts: 369
Joined: 3/16/2002
From: Lebanon, OH, USA
Status: offline 		Geistware[QUOTE]I would imaging that you have less time during a pattern routine to prepare for the next maneuver compared to IMAC.[/QUOTE]

I have found this to not be so true. I seem to have a better pace (more time)to my manuvers with the pattern plane on a 17x12 as opposed to the IMAC plane on a 26x10. I am not sure how they relate to each other, but am very interested to know. perhaps some of the more knowledgable of this group can explain.

btw, my comparison is the IMAC advanced sequence to the pattern Masters sequence - both of which I am flying this year.

Hubb

(in reply to Erick Royer)
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Pattern Prop Pitch - 7/9/2002 1:20:20 AM   
OUTCAST


 

Posts: 880
Joined: 1/5/2002
From: ., NJ, USA
Status: offline 		Most of the PATTERN pilots I know not only fly much faster than I do but they seem to try to maintain one speed for the entire flight. With the exception of the hammer head the entire routine is flown at 75 MPH or so. With my planes we go from hover to harrier to vertical acceleration on the wall to high speed point rolls. The airspeed goes from 0 - 60 MPH and back. This may be the reason for the deep props use in F3A.

(in reply to Erick Royer)
       Post #: 4

Pattern Prop Pitch - 7/9/2002 1:50:46 AM   
can773



Posts: 1654
Joined: 1/25/2002
From: Calgary, AB, CANADA
Status: offline 		High pitch props is a way to eat up a lot of horsepower without becoming overly noisy.

Speed is not the issue that is why they invented throttles, the high pitch allows a much better constant speed presentation during flight. You dont ever really get that ballistic acceleration with a high pitch prop, from there you just tailor your horizontal speed to match the vertical speeds.

All in all noise is one of the big reasons, ever hear a noisy pattern ship?

As far as having less time, remember that our box is smaller, 60 degrees vs 75 degrees, or in some cases 180 degrees (no box).


Just for interest sake, my buddy who flies F3A against me had his plane radared. His setup is a Vector 2M (10.5 lbs) OS 140RX spinning a 16x13 APC. Max downwind speed, 196 kph, thats cookin' !!


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Chad Northeast

(in reply to Erick Royer)
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