Matronics Email Lists :: View topic - 6 A is flight level when?

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

6 A is flight level when?

Matronics Email Lists Forum Index -> RV-List

View previous topic :: View next topic

Author Message

mjurotich(at)hst.nasa.gov
Guest

Posted: Wed Apr 19, 2006 6:23 am Post subject: 6 A is flight level when?

I am near to getting my RV 6A back in the air after a complete 

electrical and panel rebuild.  I plan on redoing weight and 

balance.  With a slider is the top rail of the slider parallel to the 

top longeron?  The top longeron is Van's reference for on the ground 

level.  I presume the top longeron is "level" when in straight and 

level flight.



Thanks



Matthew M. Jurotich



e-mail   mail to: <mjurotich(at)hst.nasa.gov>

phone   : 301-286-5919

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

sportav8r(at)aol.com
Guest

Posted: Wed Apr 19, 2006 9:52 am Post subject: 6 A is flight level when?

That's (presumed to be) correct.  Someday, I want to see numbers where someone has done their w&b with wheels level and with top longeron level, to see if the difference is truly worth worrying about.  It's a lot of work to jack these planes into that configuration and chock the wheels and scales to correct heights (or dig a hole under the nosewheel .  I may do it myself if I get bored...

 

-Stormy

 

--

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

khorton01(at)rogers.com
Guest

Posted: Wed Apr 19, 2006 1:55 pm Post subject: 6 A is flight level when?

On 19 Apr 2006, at 10:19, Matt Jurotich wrote:



 	  Quote: 	
		   



 I presume the top longeron is "level" when in straight and

 level flight.


	


The pitch attitude in straight and level flight will depend on the  

airspeed, weight and flap angle, and to a less extent, on CG.



Kevin Horton         RV-8 (finishing kit)

Ottawa, Canada

http://www.kilohotel.com/rv8

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

lors01(at)msn.com
Guest

Posted: Wed Apr 19, 2006 3:58 pm Post subject: 6 A is flight level when?

True, which brings up a related subject.



 Anyone know what the AOA of the 230xx airfoil on the RV is at any typical cruise speed?  I need to make a decision on whether to change from stock RV incidence on my "long wing" RV-8.  Span is 3 feet longer than stock which should result in a lower AOA for any given condition.  I have a program to predict the appropriate change but don't know what it is to start with and haven't seen it in the plans book.



Tracy Crook

 	  Quote: 	
		   



 I presume the top longeron is "level" when in straight and

 level flight.


	


The pitch attitude in straight and level flight will depend on the 

airspeed, weight and flap angle, and to a less extent, on CG.



Kevin Horton         RV-8 (finishing kit)

Ottawa, Canada

http://www.kilohotel.com/rv8<http://www.kilohotel.com/rv8>

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

klwerner(at)comcast.net
Guest

Posted: Wed Apr 19, 2006 4:57 pm Post subject: 6 A is flight level when?

Hi Tracy,

How come you extended your std. RV-8 Wings to become 3ft. longer?

Just curious to find out your reason.



Do not archive



SNIP

..on my "long wing" RV-8.  Span is 3 feet longer than stock ...

SNIP



Tracy Crook





--

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

khorton01(at)rogers.com
Guest

Posted: Wed Apr 19, 2006 5:25 pm Post subject: 6 A is flight level when?

The AOA will be quite low.  If the airfoil was a true 23013.5 series,  

and this was a 2D wing (i.e. there were no effects from the fuselage  

or wing tip, the AOA at 1600 lb, 212 mph at 8,000 ft would be about  

0.3 degrees (value calculated by XFOIL).  If we drop the cruise speed  

to 189 mph, the AOA would be about 0.6 degrees.

I understand that the leading edge of the RV airfoil differs slightly  

from the NACA profile.  And, the local AOA is not constant along the  

span, due to the effect of the fuselage and wing tip.  So the above  

values must be considered as approximate.

Kevin Horton

On 19 Apr 2006, at 19:55, Tracy Crook wrote:

 	  Quote: 	

 True, which brings up a related subject.

  Anyone know what the AOA of the 230xx airfoil on the RV is at any  

 typical cruise speed?  I need to make a decision on whether to  

 change from stock RV incidence on my "long wing" RV-8.  Span is 3  

 feet longer than stock which should result in a lower AOA for any  

 given condition.  I have a program to predict the appropriate  

 change but don't know what it is to start with and haven't seen it  

 in the plans book.

 Tracy Crook

> 

> <mjurotich(at)hst.nasa.gov<mailto:mjurotich(at)hst.nasa.gov>>

>

> I presume the top longeron is "level" when in straight and

> level flight.

 The pitch attitude in straight and level flight will depend on the

 airspeed, weight and flap angle, and to a less extent, on CG.

 Kevin Horton         RV-8 (finishing kit)

 Ottawa, Canada

 http://www.kilohotel.com/rv8<http://www.kilohotel.com/rv8>

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

low pass

Joined: 10 Jan 2006
Posts: 32
Location: Houston

Posted: Wed Apr 19, 2006 6:03 pm Post subject: Re: 6 A is flight level when?

Tracy -



Regarding the 3' longer wings, did you consider the change in flutter characteristics of the new wings?  How about longitudinal stability?



Not trying to be a downer on new ideas, but I would be very concerned about the change in resonance characteristics of the wing.  And to a lesser degree the stability. 



Just curious



Bryan Jones, PE, -8

Houston, Texas

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

randy(at)romeolima.com
Guest

Posted: Wed Apr 19, 2006 8:15 pm Post subject: 6 A is flight level when?

The standard angle of incidence on the RV-4 and RV-8 is .5 degrees. The 

guppy planes (side-by-side) are 1.0 degrees. Curiously the RV-3 is also 1.0 

degrees.



Randy Lervold



---

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

Display posts from previous:

	Matronics Email Lists Forum Index -> RV-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum