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Old Nov 21, 2011, 02:10 PM
Registered User
The Willamette Valley, Oregon
Joined Dec 2008
1,213 Posts
Pitcherons...

Quote:
Originally Posted by ShredAir View Post
Given the moment arms and weight of a typical Rodent fuse (long nose, short tail moment, heavy fuse), I think a separate elevator will have a crisper pitch response. The Twist-N-Shout has a nice long tail moment, making it a great candidate for a pitcheron.

Dieter Mahlein, ShredAir
Devils advocate-- I see it just the opposite -- ultimately, our pitch control inputs are all about changing the angle-of-attack of the wings. That's what ultimately drives a change in lift which creates a curve in the flight path (loop, turn, whatever). If fuselage is heavy with lots of inertia, isn't that the scenario that most favors a pitcheron set-up? Move the servos and you have an instant angle-of-attack change, and the flight path starts to curve-- that's a snappy pitch response. An elevator would have to overcome the fuselage inertia before making any change in the wing's a-o-a-- particularly problematic if the tail moment arm is short.

Does it not work out this way in practice? Am I missing something? Seems to me a heavy long fuselage with a short tail moment will always degrade pitch reponse, but the degradation might be least severe with the pitcheron setup rather than the conventional setup... Steve
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Old Nov 21, 2011, 05:17 PM
slope'n the Colombian Andes
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Colombia, Antioquia, Girardota
Joined Mar 2001
4,699 Posts
Quote:
Originally Posted by aeronaut999 View Post
Am I missing something? Seems to me a heavy long fuselage with a short tail moment will always degrade pitch reponse, but the degradation might be least severe with the pitcheron setup rather than the conventional setup... Steve
I may be the one missing something... my train of thought may be in reverse.
Just got back catching the lift caused by a storm approaching from behind, sucking the warm valley air up toward it. Stellar... : )
Anyone flying at Peterson now (2:20)?

Dieter Mahlein, ShredAir
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Old Nov 21, 2011, 07:51 PM
Eugene Glider Guiders
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Eugene, Oregon
Joined Dec 2008
92 Posts
Hey all, who's going to PB tomorrow? looks like 15 mph plus!!
Hoody Pants
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Old Nov 21, 2011, 08:07 PM
Pat Chewning
USA, OR, Beaverton
Joined Sep 2009
318 Posts
Quote:
Originally Posted by Hoody Pants View Post
Hey all, who's going to PB tomorrow? looks like 15 mph plus!!
Hoody Pants
Most likely I will be there.
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Old Nov 21, 2011, 08:09 PM
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United States, OR, Corvallis
Joined Mar 2007
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Dang it, don't you people work???!!!
I'm sitting here trying to see how I can call in sick tomorrow
Tom
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Old Nov 21, 2011, 08:10 PM
Eugene Glider Guiders
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Eugene, Oregon
Joined Dec 2008
92 Posts
Cool. i will try to drag someone with me.
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Old Nov 21, 2011, 08:14 PM
Pat Chewning
USA, OR, Beaverton
Joined Sep 2009
318 Posts
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Originally Posted by tomleach View Post
Dang it, don't you people work???!!!
I'm sitting here trying to see how I can call in sick tomorrow
Tom
Try this: "I'm (cough, cough, cough) not feeling well today. I won't be in to work. I don't want anyone else to catch this ...."


BTW: Being sick OF work is still being sick ....
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Old Nov 21, 2011, 08:45 PM
Yes, ALL your money...
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A hut in the woods in Oregon
Joined Jan 2003
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Just got back from PB. It was high clouds and no rain. 18-25 SSW. Flew my Hypnosis and my M70 Jart. VinMech maidened his lightweight Speedo in a solid 20mph. It cut thru the chop pretty well considering how light it is.

WinchDoc


did you ever come back from flying with MORE planes than when you went out?
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Old Nov 21, 2011, 09:30 PM
pnc
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USA, OR, Eugene
Joined Jun 2009
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yes

Jana and I will be there gotta try the new xplane and the Icon w ballast ........... See yall there

P
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Old Nov 21, 2011, 10:18 PM
Registered User
The Willamette Valley, Oregon
Joined Dec 2008
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Well you know my quiver of planes is small so I'm not speaking from vast experience, only theory....

Maybe a pitcheron input would immediately "kink" the flight path in a sharp bend but tend not lead to sustained curve (loop, turn, etc), if we aren't imparting a pitch rotation to the fuselage very efficiently... and the fuselage has lots of inertia...

Interesting to puzzle over....

Maybe Pat will build that Rodent w/ pitcheron and give us a firsthand report...

Steve

Quote:
Originally Posted by ShredAir View Post
I may be the one missing something... my train of thought may be in reverse.
Just got back catching the lift caused by a storm approaching from behind, sucking the warm valley air up toward it. Stellar... : )
Anyone flying at Peterson now (2:20)?

Dieter Mahlein, ShredAir
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Old Nov 21, 2011, 10:22 PM
Eugene Glider Guiders
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Eugene, Oregon
Joined Dec 2008
92 Posts
Looks like the wind will be 25- 30 with gusts up to 50 mph with the rain 100% precip.
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Old Nov 21, 2011, 10:55 PM
Pat Chewning
USA, OR, Beaverton
Joined Sep 2009
318 Posts
Quote:
Originally Posted by Hoody Pants View Post
Looks like the wind will be 25- 30 with gusts up to 50 mph with the rain 100% precip.
It depends on which weather forecast you believe. It will be strong winds, and it will be wet. The only question is HOW strong and HOW wet?

The weather prediction I like to use shows 15-20mph with Corvallis area just on the edge of the steady rain (i.e. Rain showers less than 1/4 inch all day)...

See here:http://www.atmos.washington.edu/~ove...or_pcp1+//72/1

The best time looks like 0900-1300 , so getting there early might be better than late.
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Old Nov 22, 2011, 12:58 AM
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United States, OR, Tualatin
Joined Apr 2005
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This is the weather forecast that I like: http://www.wunderground.com/cgi-bin/...:97333.3.99999

It says 80% chance of rain and 20 MPH south wind. To wet for me. I have had good luck at 50% chance rain.

Tom, who will be working on a Rotor fuse.
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Old Nov 22, 2011, 01:08 AM
Build A Rocket Boys!
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Portland, Oregon
Joined May 2002
4,055 Posts
Sitting here on the sidelines as usual. Hoping for wind either Thurs, Fri, Sat, or Sunday. I need to get my Crossfire Evo maidened!
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Old Nov 22, 2011, 11:19 AM
Eugene Glider Guiders
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Eugene, Oregon
Joined Dec 2008
92 Posts
It is turning out to be a really busy day for me. I will not be able to fly today.
Hoody out!!
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